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View Full Version : up-grade the engine or get more hp



86-250Rnut
06-27-2005, 07:06 PM
I have a 86 250R wtih alot of mods,but i need more power! its geared so high that when i hit 6th gear that it dogs out so i cant get it out of 5th. im going to guess it has about 60hp. i need more hp with out spendin a-lot of money(i was hopein around 800 give or take 100) or i could use a new motor but really dont want to start a project like that till winter. so can someone plz help me out?
thanks guys,
Mitch:)

TheFontMaster
06-27-2005, 07:28 PM
Simple solution, gear it down.

86-250Rnut
06-27-2005, 07:33 PM
but i like the speed!

baker250r
06-27-2005, 07:33 PM
well we cant help u if we dont know wut all u got for "mods" on it right now

TheFontMaster
06-27-2005, 07:37 PM
Is this quad soley for drag racing? I can't see any other aplication where so much speed would be needed. And like Baker said, lets hear what your running.

86-250Rnut
06-27-2005, 07:38 PM
not 2 sure but ill name some. i got to get the pinkslips from the guy. ill get them this week i hope.

its fully ported and poslished, bored 30 over, something was done to the head for more compression-he guy who had it b4 the guy i bought it from did it so we really dont know what was done to it-,power reeds and all freash seals and brearings.
thats all i know for sure, sorry
mitch

TheFontMaster
06-27-2005, 07:41 PM
Well with only those mods, I can tell you that you are a far cry from the 60 HP you said it was making. You would need a pritty build 310, or something like a 350 or 370 PV motor to be putting out that 60 HP your claiming.

baker250r
06-27-2005, 07:41 PM
well if thats all it is.... but we dotn know yet. ur goona want a top end pipe. then ur goona want a bigger carb... 38 or 39. probly run no air box. reed spacer. cr250 reed cage assembly... either boysen or v-force 2 or 3. and i dont think u want higher compression for a top end bike.... but id say get a 87-88 6th gear

06-27-2005, 07:42 PM
Originally posted by 86-250Rnut
but i like the speed!

You will still have the speed once you get it in 6th...

Gear it down your just straining the hell out of the engine.

PS no way in hell your close to 60hp, if it was you would have zero problems with your gearing.

86-250Rnut
06-27-2005, 07:51 PM
yea thats what i was told from the dood "60hp" but there are more mods but not sure witch till i talk to the guy.i have an aaen pipe and a stock carb. i would send some pics of it but but i dont know how but i still would like it geared that way. i might just buy a lower 6th for now and save up for like a stroker kit for the winter or summin. but u got to give me a bone i just bought it and dont know much about it.sorry
mitch

06-27-2005, 07:53 PM
Well it aint no 60hp i cna tell you that :) dont care what that guy told you, must have told you that to get it sold.

86-250Rnut
06-27-2005, 07:54 PM
i got it for 3 grand even if he didnt say that i would have bought it. it looks pretty shhweeeeeettttttt

TheFontMaster
06-27-2005, 07:55 PM
If you email me some pics I can post them, thefontmaster06@aol.com

And you can't lower just 6th gear, you have to buy ether a smaller front sproket, or a larger rear sproket.

86-250Rnut
06-27-2005, 08:03 PM
hey thanks
ill send them in the morning. got to go pick up my camera from my grandpas house and put them on my computer. thankyou
mitch

86-250Rnut
06-28-2005, 11:31 AM
Hey font i just sent them pics

TheFontMaster
06-28-2005, 07:33 PM
Originally posted by 86-250Rnut
Hey font i just sent them pics

I got them, I'll have them up tomorow after work.

06-28-2005, 07:33 PM
Just use this please.

http://www.island-designs.com/pictures/upload2new.asp

once its uploaded it will give you the link to paste in your post for it to show up.

86-250Rnut
06-28-2005, 07:56 PM
hey wolf i sent one but i dont know if it went threw or not.and what pics of the quad u want? sideshot/engine/front/ ect.

TheFontMaster
06-28-2005, 08:53 PM
Here's the pics, Very nice quad you got there.

http://img.photobucket.com/albums/v602/fonty/Sexy.jpg
http://img.photobucket.com/albums/v602/fonty/powder-coatedswingarm.jpg
http://img.photobucket.com/albums/v602/fonty/Fullskidplates.jpg
http://img.photobucket.com/albums/v602/fonty/AAENPipe.jpg
http://img.photobucket.com/albums/v602/fonty/250cc.jpg

#1speedbump
06-28-2005, 09:30 PM
I would ditch the Aaen pipe for just about any other pipe out there. ( fmf, duncan,lrd,esr). Then I would jump to a 38 or 39 PWK with a set of V-Force reeds to go with the new carb. JET IT RIGHT!!! This is often over looked and can really help ya out.

Get your port work looked at by a REPUTABLE builder. It could be a horrible hack job and is doing more harm than good. How bout getting a new ignition ( CR, DYNA,MSD) are all good alternatives.

If that isnt enough then jump into the 310-330 kits and hold on.

06-29-2005, 09:51 AM
Originally posted by 86-250Rnut
hey wolf i sent one but i dont know if it went threw or not.and what pics of the quad u want? sideshot/engine/front/ ect.

You need to follow the instructions i gave.

after you click upload after browsing for the file on your computer, you have to wait it will give you another webpage whree you can copy and paste the link into your message here.

06-29-2005, 09:53 AM
Yes ditch that pipe, get an FMF or whatever you can afford, pretty much any other pipe will be much better than that one.

Upgrade the carb as well like someone else also mentioned.

Perhaps its this setup, people get only 26hp from :)

Other than that dude, you got yourself a nice quad, frame looks in very good condition along with its axel and swingarm/arms.

86-250Rnut
06-29-2005, 11:36 AM
Hey thanks guys.
but why trash the pipe? what is wrong with it, i heard it was a fairly good pipe. and what kind of carb should i get? and what size carb is on there now?
thanks
mitch
ohh and them tires suck i have a better pair, just to tell you:blah:

86-250Rnut
06-29-2005, 12:06 PM
ohh and 1 more ?. could i beat a raptor or a banshee?

#1speedbump
06-29-2005, 01:20 PM
The pipe is like everything in life........what you are told is not always the truth! It is an improvement over stock and may have been a fair price thus the thought of it being good.

The bottom line is that the R has been around for years and many of dyno runs have been done with almost all the pipes around. For a great all around pipe at a fair price the FMF FAtty cant be beat. Next in line IMO is the ESR 5 again for ALL AROUND power. If you want something for top end or more specific areas look into the Sparks TT, MX, FTZ although I havent heard alot of good about it, ESR 11 or a custom CPI.

As far as what carb is on there it is hard to say from the pics. I am not a carb guru. Go look at it and it will most likely give itself away;) Seriously though the thoughts on carbs are like those on pipes. Everyone has there own opinions. I like the PWK's 38 or 39. I run a 39 on my 86 with a FMF Hi rev, Vforce reeds and it hit 39.5 on a local dyno. I like the PWK's because they are simple and easy to jet.

The only way to tell what you can beat is to get out and race it. if you lose well then you have a starting point.

06-29-2005, 01:58 PM
A raptor you can beat for sure... banshee will take some upgrade on pipe, reeds, carb and then you might still be a little behind or even, you will have to goto a bigger kit if your going to want to kill the banshee.

Banshee has alot going for it and they hardly stay stock for very long, on a drag it will win all the time if your not running a big bore kit.

But the banshee will not outperform you on corners, so you should be able to dominate over a banshee when it comes to handling.

zedicus00
06-29-2005, 02:16 PM
get a used carb of a newish 250 2 stroke dirtbike. i got one off a ymmi. they r 38mm A/S pwk carbs an they run about 50$ take a lil bit of modding but works good when yur done. while yur at it get a new intake boot and reed and match port inside of the reed to the boot anyways.

an get a good all around pipe, like an esr trx5

Iliketogofast
06-29-2005, 03:38 PM
350PV

Iliketogofast
06-29-2005, 03:40 PM
Nice R btw... Very cool swingarm man.

86-250Rnut
06-29-2005, 04:33 PM
thankyou, but im not a big fan of the red. i wish it was all gold like that.
and what the heck is pv stand for?

z400clone
06-29-2005, 04:45 PM
"powervalve"

86-250Rnut
06-29-2005, 09:18 PM
So i heard yoshi pipes were good. and i may look into 1 of them. but i would possibly get a DG or a fmf. what do you guys think?
also what kind of carb should i get? i dont know much about them so if i ask alot of ?'s about them dont get mad:) and i was thinking of either a 310 kit or nos. i would really like the nos just 2 say i have it on a quad but dont know much about it. what do you think?
thanks
mitch

06-29-2005, 09:32 PM
I would get the FMF pipe and the 310 kit, leave the nos for later.

TheFontMaster
06-29-2005, 10:00 PM
Yea you don't want NOS, learn a little more about how everything on your quad works befrore you spend 700 dollars on a kit that can blow your motor in a mater of seconds if it's installed wrong. For pipes, I would stay away from DG. I also hear sparks pipes are one of the best. I have one of those for my 250r, but it's still not running, haha.

#1speedbump
06-29-2005, 10:13 PM
Yep Yoshi's are good but I have never seen one on a two stroke.

Look and read the reponses, you have been told what carbs work good as well as what pipes work good. People are repeating one another that leads me to believe that the pipes and carbs recommended will WORK GOOD.

z400clone
06-29-2005, 10:27 PM
Originally posted by #1speedbump
Yep Yoshi's are good but I have never seen one on a two stroke.



LMAO!!!

86-250Rnut
06-30-2005, 08:31 AM
But i hear NOS can be good for your engine as long as u dont overuse it and or install it wrong.but i dont know much about it so i think ill take ur advice and stay away from it.


So u guys think i should stick with the good ol fmf pipe? and can i keep my silencer on there? its an answer s-11.

zedicus00
06-30-2005, 08:41 AM
sorry but i hafta add FMF is quite possibly the worst 250R pip ive ever used.

i would take a DG over them any day.

NOS is never 'good' for an engine.

yes you can keep yur silencer, they are all pretty much a standard size inlet unless u r using a big bore pipe. (which u dont need on a 310)

get ready to learn a lot, and get a manuall.

86-250Rnut
06-30-2005, 09:10 AM
Well whats ur suggestion on a pipe?

z400clone
06-30-2005, 09:33 AM
Originally posted by #1speedbump
Next in line IMO is the ESR 5 again for ALL AROUND power.


All the answers lie within the post. Take the info the guys have provided and get to work.

wilkin250r
06-30-2005, 12:35 PM
You've got a lot of information, now it's just time to wade through it all and separate fact from BS.

FMF is not a bad pipe. It's an overall pipe, but doesn't excel in any one area. A good rider will generally be faster on a pipe that is dedicated to a specific power range, but a novice rider may not have the skill to keep in a narrow powerband. It's kinda like cars, do you want to tow heavy loads, or get good gas mileage? you won't get both, you can't tow with a Honda Civic. If you want middle ground, get a Toyota Pickup, it will kinda do both, but doesn't excel at either one.

The other thing to mention is that all your engine components work together, and some work better than others. I know enough to be able to put together a good engine package from different components, but you may not have that knowlege. One carb isn't best for all applications, one head isn't the best for all riding styles, and one pipe doesn't out-perform all others in every single scenario.

If you want stellar performance, you want to choose components that compliment each other. There are alots of little details involved for max power. I highly suggest sending it to a professional, or buying a complete engine kit already proven to work well as a package. It's more expensive that way, yes, but it's very difficult to peice together a good engine from individual components if you don't know what you're doing.

hollywood250r
06-30-2005, 08:49 PM
Originally posted by TheFontMaster
Well with only those mods, I can tell you that you are a far cry from the 60 HP you said it was making. You would need a pritty build 310, or something like a 350 or 370 PV motor to be putting out that 60 HP your claiming.

Actually, his motor could be close to 60hp at the wheel with his mods! Even though it is only 30 over it could be stroked! I know if a 275 getting 55-65hp at the wheel. It is all in the pipe, porting, and jetting. If you get the port and pipe match and can jet you can make a stock bore 250r that will blow 450s out the water. You don't need a 310 to get 60hp. With a 310 properly tuned and ported 310 you should be seeing 75-80hp with a 310. It is very possible that his motor is putting out 60hp.

wilkin250r
07-01-2005, 09:37 AM
Originally posted by hollywood250r
It is all in the pipe, porting, and jetting. If you get the port and pipe match and can jet you can make a stock bore 250r that will blow 450s out the water. You don't need a 310 to get 60hp. With a 310 properly tuned and ported 310 you should be seeing 75-80hp with a 310. It is very possible that his motor is putting out 60hp.

I like my powerband more than 200rpms wide...

hollywood250r
07-01-2005, 11:23 AM
Originally posted by wilkin250r
I like my powerband more than 200rpms wide...

Your powerband will be more than 200rpms wide. Think of it this way. You bike probably runs well right now and the I am willing to bet the port/pipe relationship is off. If you matched you porting to your pipe and jetted correctly you your bike would run like a raped aped. The main point I was making in the post was that you don't have to have a big bore to output 50-60hp. You have to have a well tuned motor. A lot of people buy big bore kits with generic porting and don't realize that if they had the motor customed ported to their riding needs they would have much more power with the same displacement. That is how they have the Saber cylinder at 100hp. That is a PV cylinder so you know the power is spread throughout the RPM range. They cell you the cylinder, pipe and carb. After that all you have to do is jet properly. The will port the cylinder to the pipe they give you with the kit.

wilkin250r
07-01-2005, 11:34 AM
200rpms wide was a little bit of an exaggeration. What I'm saying is that 60hp on a stock cylinder isn't easy, and certainly won't be a nice, smooth, easy powerband. It will be and arm-wrenching screamer, with a fairly narrow powerband.

hollywood250r
07-01-2005, 12:15 PM
Originally posted by wilkin250r
200rpms wide was a little bit of an exaggeration. What I'm saying is that 60hp on a stock cylinder isn't easy, and certainly won't be a nice, smooth, easy powerband. It will be and arm-wrenching screamer, with a fairly narrow powerband.

I know the 200rpm thing was an exaggeration. Actually the powerband is the midrange. It is not as narrow as you might think. I can not speak as to how hard it comes on but it gives the 450s pure hell!

07-01-2005, 12:21 PM
especially mine's, its like it never goes away LOL.

86-250Rnut
07-02-2005, 12:07 PM
Well i really think my RWHP is up there. i have a very short powrband and it dosent seem that powerfull because i get no traction. all i do is spin tires. but its still powerfull enoughf to make my arms a little sore when i get done ridding it for 20 min.
but maybe its around 50 RWHP give or take 5 hp. but then agin, i have no idea. ill have to bring it to a dyno and see what she puts out.