New project in planning stage

[Pappy]

well, since my brother is getting a 450R, i had thought of stealing most of his chassis and building my son Cody a hybrid.

right now im leaning towards a CRF250f powerplant.


any input?

[kwatts400]

Sounds like the beginning of a sweet quad.

[Syrus]

Your gonna take him from a trx90 to a crf250f engine ? thats gonna be a step and a half for any kid at his age, but im not gonna dare argue with any father and son, you would know better then I. If u decide to go with that, it would be a killer quad. Keep us updated !

[Pvt. Maggot]

I was planning on doing this in my 300ex chassie..but i didn't have a good money income..so it didn't happen...should be an awsome setup..i'm parting out my 300ex...so if u want to do it in a 300ex let me know :)

[Pappy]

Originally posted by Syrus
Your gonna take him from a trx90 to a crf250f engine ? thats gonna be a step and a half for any kid at his age,!

well thats the problem. being so into atv's i rarely get to learn about the bikes. but i have seen the 150f and i think its kind of weak for the weight of a rolling quad chassis and 105 pound rider.

i can control the speed and cody knows not to be a jackazz, but the crf250 engine you think maybe too much?

[JR3]

i dunno people do 450f conversions into blasters so i feel ur setup should be fine have u considered puttin a 2 stroke powerplant in it like a cr 250 or 125 motor

[Out_Sider]

Cody will be fine with the 250f bike.. the 150 or 230 bikes are pretty much ***** bikes power wise, the 250 will give him more than enough, but i dont think its to much for cody, he's knows how to ride

[cletusEX]

Those "little" 250 4-strokes make quite a bit of power. I think the yamaha 250 is putting out like 38 horsepower. I think that would be a killer little quad.

[chucked]

Originally posted by JR3
i dunno people do 450f conversions into blasters so i feel ur setup should be fine have u considered puttin a 2 stroke powerplant in it like a cr 250 or 125 motor
do you want to kill cody?!!!

[Syrus]

Originally posted by Pappy
well thats the problem. being so into atv's i rarely get to learn about the bikes. but i have seen the 150f and i think its kind of weak for the weight of a rolling quad chassis and 105 pound rider.

i can control the speed and cody knows not to be a jackazz, but the crf250 engine you think maybe too much?

Pappy, this is what i would do.. get him to test drive a 250ex, if he wants more speed and power than that, then the CRF250F engine should be where he's at, if he scared of it and thinks its to much bike for him, then go for something a bit smaller till he grows into a larger bike. Shouldnt be to much longer till he starts craving for speed and power... and now that hes gonna be using a clutch he will probably just love it !

As long as he has the weight and clutch skills, the CRF250F powerplant should be good, just gonna take some gettin used to im sure.

[JR3]

Originally posted by chucked
do you want to kill cody?!!!

well i jus figured if he neede a lil more power itd be there jus an idea

[Pappy]

cody can ride a 300ex on our trails with no trouble.

id thought of a 2 stroke but truthfully a 4 stroke is smooth without a hit of power that could get a young rider in trouble.

[JR3]

heres sumthin that shows it can be done into bike frame 250f motor into cr125 frame http://www.bbrmotorsports.com/Bikes/Bike80/Yellowbike1.jpg

[Cole Trane]

That would be a sweet quad if you did it. Keep us posted, I know you will. If he can ride a 300, then this would be perfect. The 250f motor has a ton more power than the 250ex, and I'd say with the right mods, it could keep up with stock 400ex.

[Quad18star]

Pappy ... those CRF250Fs have BALLZ . Although the Quad frame will weigh more than the bike frame ..... it's still gunna have arm pulling power . But then again .... you can always play with throttle screw and start him off with maybe only 1/2 throttle allowed , then work his way up until you know he can handle the power of the bike .

Cuz I think him going from a 90 cc quad to a 250f would be like a kid on a 65CC dirtbike jumping on the 250F .... someone might get hurt. Just my opinion though .

[Cole Trane]

What kind of frame would you be using? Either a 300 or maybe a mojave frame?

[Hammer trx450r]

Hey Pappy i think your fine with that motor, like you said you kids aren't jackazzs. How about making a post on all progress and problems along the way. Very cool idea, lucky kid:blah:

[Pvt. Maggot]

i think a 300ex frame would be best since hes used to riding one..thats what i was going to use..seems to be a simple swap. :)

[kicken250x]

ive rode a 250f and theyll haul my *** around pretty good. put in a 300 frame or something equal i think it would be close to mildly moded 300. i think he would do fine on it, i mean hell....after all he is son of the great pap!:p

[DEAL]

Originally posted by kicken250x
ive rode a 250f and theyll haul my *** around pretty good. put in a 300 frame or something equal i think it would be close to mildly moded 300. i think he would do fine on it, i mean hell....after all he is son of the great pap!:p


I think a 250f is closer to a modded 400ex than a 300ex.

your probably better off with the 230f or maybe even an Xr200.

[Mxjunkie]

just thought id be the one to point out they are crf250r's and not crf250f's lol, but i think the crf250r motor would be quite a powerhouse for him, but like a 300ex with one or a 250r chassis, it could be done, the xr200 motors run pretty darn good worked but it would be better off going with the crf250r

with the way cannondales r selling, you could use one of them for a start, 250r plastics and stuff, woo what a beast that would be :macho

[Pappy]

thanks for the input fella's

i havent decided on a chassis yet, like i stated i have a 400ex frame here but would prefer to run a 250R. the down fall with that is the parts are drying up and alot of junk is floating around. using the 400ex as a base model would allow access to new parts as needed.

im just kinda pissed off because there is no quad for young riders to buy . the current crop of entry level bikes are just that....entry level. my boy doesnt need gobs of arm ripping power, but id like (as he grows) for him to have a quad that can advance with him. so since they cant make one i geuss i will.

ill let him rde burgards 400ex/blaster and see how he does. if he is still too small to handle the weight ill just have to put this off for another year or so.

[Mxjunkie]

u could also try a 300ex-cr80 or a 250r-cr80 then just later on change the mounts and stuff so he can keep running bigger motors

[Pappy]

Originally posted by Mxjunkie69
u could also try a 300ex-cr80 or a 250r-cr80 then just later on change the mounts and stuff so he can keep running bigger motors

true, but those little engines just dont seem to hold up when used in a quad enviroment. ive discussed this with those that have them and say they are a plain headache:(

[jcv400ex]

Kenny, you need to take a road trip up to Hetricks. He's the east coast mini specialist. We had a 90cc modded Kasea and it went head to head with a Speed in a drag. He also builds the sick 70cc and 90cc mod quads. Custom chassis, and I'm sure he could squeeze a CRF250R motor in a Chassis. The only downfall of the CRF motor is it's a racer. Maintence would be easier on the XR models. I agree with ya on the 4 stroke though, I think it's the way to go. If you did build up his current mini, Little Man could grow into it, so it wouldn't be money not well spent.

[remlapr]

I would say wait and see what the GNCC people are going to do about mini races and classes for next year, no need to build him a quad he can't race right now.

If you were going to build him a hybrid, I think a 250f in a blaster frame would be a trick setup...

[Pappy]

yep i know rick hetrick...damn fine person.

the building/fabrication isnt an issue...i have the technology:scary:

the think i see with my boy is that he isnt frail or small. he is a brute:p the mini quads are already getting too small but he will be forced to race them until he is 16 if he keeps running XC type events.

the 90's we have now are just on the edge of fitting him. if it was merely a power or handling concern it wouldnt bother me at all.


(hint im just wanting to build a kick *** quad and the ol'lady wont let me build another one for me:cool: )

[BSTURDIVANT]

If he's going to run any XC then think about the CRF250x with electric start and a little milder cam! The Mohave takes less mods and a lot less fabrication-just add some HP to the engine, wider axle and arms with a good set of shocks and it will be a pretty potent force to recon with!

[MotoX3]

hes probly just at the age/size where its soooo hard to find the right thing....like when i was 12 i was 5 10 and 150 pounds:eek2: ....my dad just decided that i was a good and responsible enough rider that i could handle a bigger bike...i think you are the one that could decide the best quad for him:macho

[Pappy]

thanks brent...the electric start would be a big plus.

[cheetah]

Originally posted by Pappy
(hint im just wanting to build a kick *** quad and the ol'lady wont let me build another one for me:cool: )

Hey I'll take a donation from ya Pappy.:D

[Pappy]

Originally posted by MotoX3
hes probly just at the age/size where its soooo hard to find the right thing....like when i was 12 i was 5 10 and 150 pounds:eek2: ....my dad just decided that i was a good and responsible enough rider that i could handle a bigger bike...i think you are the one that could decide the best quad for him:macho

i know he is plenty responsible. and yes, his size will dictate what machine he is physically capable of handling. i know some parents that allow young children to operate quads that can get away from them in a flash but they feel its fine. i dont.

weight of the machine and a broad smooth powerband decide for me what i allow him to ride. he knows how to control his speed, but if the weight of the machine is too much he is screwed. ive let him ride my 450R around the yard but would never dream of letting him hit the track on it.

[DEAL]

You could also check out a 200x motor.

[Pappy]

Originally posted by DEAL
You could also check out a 200x motor.

yep i know. but that brings me back to the future. if i build one i want it to be of current design. the 200x engine can be made to run very good but id really like to stay with a newer model engine.

[DEAL]

Originally posted by Pappy
yep i know. but that brings me back to the future. if i build one i want it to be of current design. the 200x engine can be made to run very good but id really like to stay with a newer model engine.

The older 83-85 200x motors are almost indeticle to the xr200 motor used today.

[Rrider4life8]

here we have a 10- 12 year old that races the JMX series ..... cr80 motor. It pulls pretty good.

http://www.ncdirtrider.com/graphics/topgun080704/p08/img_8962.jpg

http://www.ncdirtrider.com/graphics/topgun080704/p08/img_8979.jpg

http://www.ncdirtrider.com/graphics/topgun091104/p05/img_2865.jpg

http://www.ncdirtrider.com/graphics/topgun091104/p05/img_2873.jpg

[Mxjunkie]

that is one wide mini :eek2:

[Pappy]

what chassis was used for that quad?

[Rrider4life8]

i dont recall. I think his dad said it was a lonestar????

Its a sweet mini tho

[theTman]

thats what i would do for cody pappy...he would have so much fun with it:)

[Ericthered rdr]

Originally posted by Pappy
thanks for the input fella's

im just kinda pissed off because there is no quad for young riders to buy . the current crop of entry level bikes are just that....entry level. my boy doesnt need gobs of arm ripping power, but id like (as he grows) for him to have a quad that can advance with him. so since they cant make one i geuss i will.


Pappy this is a big problem that the quad manufactures need to address. There are no mid sized quads out there for the 11-15 yo range. I think Polaris came out with the Pheonix 200 but I have a feeling it is a terd. What needs to be built is a frame sized around the blaster with a powerplant similar to the new 250 fourstrokes. These quads could be made lighter and safer than some of the 250's out now. What I see are parents in your situation, they have a child that is too big for a 90cc unit and too small for a 250EX or Z. I see these parents buy them for the kids and it is too big and bulky, mainly too heavy for them to safely control. I have a 12yo daughter that is 5' tall and very light (mabey 75#) She is begging me for her own quad....sure I can go to a local dealer and get her one but the feds tell them not to sell me one over 90cc. This needs to be increased to at least 200cc. Here are the feds limits
50cc not under 6yo ( my 5 yo is too young for his Kasea 50)
90cc not under 12yo (give me a break my 7yo can fling one around no prob)
anything over 90cc you better be 16 yo or big brother can come and get ya

Now these warning lables my not affect you or your local salesman but if you show up at most state parks or privately owned ORV parks and tracks they might not let your child ride if they dont meet the federal age requirement of the quad. I am starting to ramble you get the picture. The goverment needs to back off on some things. The manufactures need to nut up and build a safer "size" specifc quad.

[SRH]

Originally posted by Pappy
well thats the problem. being so into atv's i rarely get to learn about the bikes. but i have seen the 150f and i think its kind of weak for the weight of a rolling quad chassis and 105 pound rider.

i can control the speed and cody knows not to be a jackazz, but the crf250 engine you think maybe too much?

the crf and yzf 250s are fast they feel close to a 250 2 stroke they make more ponies than a 400ex and the power is like a 450r or a yfz

pappy, id go with a 150f bike motor but... have you looked into modding out that 90 motor or getting a crf 50 motor and going to a 124 dual over head cam liquid cooled top end with manual clutch etc...they make a ton of power ...easily faster than a crf 230 or xr 200 but it would be a really cool project if you ask me, just build a custom chassis off of the trx 90, the crf/xr/z motor should bolt right in, i know it does sound fast but i beilive there close to or over 15 hp, and really fly

couldnt find a pic of the liquid but heres a 124 dohc superhead motor http://www.hondaminitrail.com/gifs/P660-3.jpg you could stick a 150 motor or something in t here or crf 230 but i dont think they put out as much power and ther enot quite as trick as a race motor

[Fred55]

Pappy, have you considered a Wr250F?
Its a toned down version of the YZ250F, with electric start! The ratios are also supposed to be better for the woods also.

[SRH]

Originally posted by Fred55
Pappy, have you considered a Wr250F?
Its a toned down version of the YZ250F, with electric start! The ratios are also supposed to be better for the woods also.

is this going ot be a 90 sized quad or a 400ex sized, becauce a 250f motor would only really suite a normal adult sized quad

[bradley300]

you guys are talking about ALOT of different bikes, but seem to be reffering to the same ones1lol the crf230f is an xr type motor, very mild, air cooled
the crf250x is a yammy wr equivelent,liquid cooled,racy and more gncc orriented. the crf250r is the yzf eqivelent, gobs of mx type power,liquid cooled . pappy, i would say if your going to build any of them,the crf-x would prolly be the best and here is why
if you use the crf-f motor, you might as well just save your moneyand buy him a 300ex b/c i bet power would be dang close
the crf-r motor will rip,if he cant handle a piped 400ex,this isnt the motor for him, not only will it be about the speed of a piped 400ex,but it will also be a much more peaky two stroke type power.
to me,the crf-x would be right ther in the middle, and i think its even electric start.
next is the chassis. i would say just for ease of the swap, a z400 would be the best frame to use. i say that because it handles great and a plus is it has raditor mounts already. if thats just too heavy for the lil man, put him on a blaster frame. my blaster with the crhomoly a-arms and swingarm still wieghs less than a stock yfz or 450r. the chassis dosent handle great, but a good rider can over come that over the handleing of say a 300ex and i'm sure burgaurd would make you a set of lt a-arms for it like my laegers

[SRH]

Originally posted by bradley300
you guys are talking about ALOT of different bikes, but seem to be reffering to the same ones1lol the crf230f is an xr type motor, very mild, air cooled
the crf250x is a yammy wr equivelent,liquid cooled,racy and more gncc orriented. the crf250r is the yzf eqivelent, gobs of mx type power,liquid cooled . pappy, i would say if your going to build any of them,the crf-x would prolly be the best and here is why
if you use the crf-f motor, you might as well just save your moneyand buy him a 300ex b/c i bet power would be dang close
the crf-r motor will rip,if he cant handle a piped 400ex,this isnt the motor for him, not only will it be about the speed of a piped 400ex,but it will also be a much more peaky two stroke type power.
to me,the crf-x would be right ther in the middle, and i think its even electric start.
next is the chassis. i would say just for ease of the swap, a z400 would be the best frame to use. i say that because it handles great and a plus is it has raditor mounts already. if thats just too heavy for the lil man, put him on a blaster frame. my blaster with the crhomoly a-arms and swingarm still wieghs less than a stock yfz or 450r. the chassis dosent handle great, but a good rider can over come that over the handleing of say a 300ex and i'm sure burgaurd would make you a set of lt a-arms for it like my laegers

a crf 250r or x are both faster stock than any 400ex there is something wrong if they cant walk by the 400ex likes its not moving

[CEET400ex]

It sounds like Cody knows his limits and rides safe so I don't see why he couldnt handle the motor. Plus it gives him something to grow into that he can ride for awhile. I don't see why the CRF250 wouldn't be a good choice if he rides smart. But hey, I'm 15, what do I know....:macho

[EXRIDER400KFX]

pappy, im just curious, how old is cody? he looks like hes gonna be ridin your quads before long :eek:

[Pappy]

Originally posted by EXRIDER400KFX
pappy, im just curious, how old is cody? he looks like hes gonna be ridin your quads before long :eek:

cody is 11 and has been riding since he was 6

yes he knows his limits on a quad that has too much power for him, he has a good head on his shoulders that why i dont fear him being on something because i know he will make smart choices. and again, i can control how fast the quad will be allowed to go.

this wont be a race bike per say, just something for him to ride here and at the local track for fun allowing him to learn and grow with out having to buy a new quad evey 6 months because he has outgrowed yet another quad:p

the biggest advantage he has is that he is short. the honda 90 still fits him fairly well and we will be modding it extensively this winter.

btw...thats a cr80 powered hybrid behind cody....and thats where it stayed:chinese:

[trick450r]

i would say go for it...i started riding at 5 and when i turned 11 i got a mojave...a very modified mojave...grew out of it and when i was about 13 maybe a little younger we got an extremely fast 250r for me and i was fine with it....what im getting at is if i had just gotten the 250r and tuned it down a bit we would have saved a crap load of cash.....

[Rico]

I say Let GT Thunder finish up that motor pappy, if you find the right jet...:mad: and go from there. The pull start really sucks though for starts in XC..:(

I think the jump to the 125 dirtbike motor would be the right step. The 250 seems too big right now, put the project off for another year. Start building it this time next year and have it finished his birthday. I think it would be a perfect 13th birthday present..:D

put a yz250f engine in a blaster frame. Its coming sooner or later from yamaha and youll be the first to have one!:chinese:

[400exbiggun]

with all due respect, he seems like a very good rider for his age:D

but in all honesty, im thinking a quad with a good running and good setup chassis like im sure you are planning on will be enough or more quad then some people on this site are willing to throw around.

I rode a couple bikes.
Only own the 230f...and everyone who says the 230f is a slow POS...is a retard. Its NOT A FAST BIKE but its decent. What do you expect outta a trail bike.


I also got to ride a wr250, and a crf250x. That bike has some balls. My little 230 is nothing compared to the 250. ANd i have been around my share of decently powered bikes and quads as well (tecate, rmx250, ktm250exc, 400ex's)

but your dad, you know whats best.


I wish my dad would build me a quad...well even buy me a quad:(

[Out_Sider]

Originally posted by Rrider4life8
here we have a 10- 12 year old that races the JMX series ..... cr80 motor. It pulls pretty good.

http://www.ncdirtrider.com/graphics/topgun080704/p08/img_8962.jpg

http://www.ncdirtrider.com/graphics/topgun080704/p08/img_8979.jpg

http://www.ncdirtrider.com/graphics/topgun091104/p05/img_2865.jpg

http://www.ncdirtrider.com/graphics/topgun091104/p05/img_2873.jpg

DUDE!! i saw him at Parker Valley, that quad is a little bad ***

[Chef]

Pappy, as trick as teh CRF250X quad would be, why dont you just buy him a 400ex? I had one when I was 11, and it wasnt a problem. Just leave it stock and let him go with it. Unless I missed something, thats the way I would do it.

[Tommy 17]

pappy the 250f motors are just like ur brothers 426... u might as well just leave him on the 426 and save urself a TON of money...


if ur lookin for a middle motor between a 80 and a 125/250 4stroke... go build him a kx100 powered quad... its the only logical motor between the 2...


if it was me i'd think about a 250x/350x conversion but then again parts will be a pain to find and ur gonna be running old parts...

a stock 400ex does sound good 2...

[JR3]

pappy i rode with a guy that has the new kfx 4 stroke 250 and it should have plenty of power the thing was nice and hes puttin a pipe on it to

[TheFontMaster]

I would say stay away from the crf230f motor. I rode one of those over the summer and it had no power at all. Bogged so easily at the local sand pit. My 300ex or my friends rancher 350 4x4 would kill it.

[I-7]

Honestly, I think the crf250r will have alittle too much torque and power for someone of that age. But then again, if you are comfortable with him making a jump from a 90 to that, then I guess it will be the right decision. Personally, If it was me, I would start with an 85cc/100cc engine. The power delievery isn't as wild and its a very smooth engine. It will be easier to work on, and it will be something to grow into. But if your spending that much money your going to want something that will last him awhile. Tough decision but me personally, owning a 250, think its alittle too much.

[ex kid]

WR 250 motor in a BLASTER!

[ex kid]

my thoughts.. the WR motor is wide ratio and has electrict start. kicking over the MX Honda's or Yamaha is probably going to be tough for him to learn. the WR doesn't hit quite as hard as the YZ and has a different flywheel to prevent stalling. in a Blaster frame the power to weight ratio would be great. the WR's are reliable and there are ton's of aftermarket frame/suspension parts for a Blaster.

[SRH]

id get him that 125 motor i posted it will bolt right up to his chassis or should, and it has more balls than a crf 150 and no sense in doing a 350x in a 250x when the 350 makes more power and youd be putting it in a less stable chassis, or get him a 400ex

[Bush0102]

the 250 f has plenty of power...i was running with one last time i was at the track (the rider was a pretty big older guy) and he was taking off on the straights pretty good from my piped/jetted/filtered 400ex and giving me plenty of roost...

i'd get on the inside and let him have it on every turn though:D

but i think your next step up from the 90 is the 125 dirtbike motor. the 250 may be just a little too much for now. however, if you do go with a liquid cooled motor, whoever suggested the z/kfx frame had a good point with the radiator mounts...but if you have a 400ex frame you can probably whip somthing up...after all, you are pappy:scary:

[Bush0102]

any progress pappy?

[250xridamatt]

I wish my dad would build me a quad...well even buy me a quad



Amen to that.

Also, i was talking to a kid and his dad that were at the race i went to yesterday, at a local track. On his trx107 with works and a few other things this kid demolished all the other ones. I think he was 13. They told me how he did one gncc race and how this guy gave away a kasea (good advertising idea). I guess he had picked up so many sponsers lately that they are not even sure who all they have. But he said he just got elka. I just dont understand to get a sponsership from elka at the age of 13!

Hes getting his motor bored the 124.7 and a new frame, plus a whole bunch of new goodies then he is gonna race national next year.

I wish i would have started to ride when i was young, like your son.


By the way, sorry for the offtopic post, and good job getting the word across on the kasea give away. I think it surprised the heck out of a lot of people.

[Fred55]

Originally posted by 250xridamatt
They told me how he did one gncc race and how this guy gave away a kasea (good advertising idea). .

I think that was Pappy/Exriders who gave that quad away......

[Bill Fuller]

Pappy,what about the Gas Gas that can be destroked from the 300cc it is stock and as Cody grows you can always step up the power with his advancement.When at Lorettas we camped next to a bike like this and it was BAD ***** used alot of Honda style parts and geometry.I was impressed.I believe the builder joined the site after the race since I told him about us.I do remember there being a bunch of controvercy about the destoking of the motor but I think it is a great idea and in the long run would save a young racer alot of money.