LTR 500 or KTM 300

[250Renvy]

I'm thinking of converting a NEW Fourstroke quad to 2-stroke, so I'm looking for thoughts on the best setup. Ideally I'd like to stick to same make motor as chassis.

Here are some thoughts - which do you think will be best, easiest and most available.

LTR 450 with LT 500 motor.

KTM 450XC with KTM 300 motor.

YFZ 450 with Banshee motor or TRI-Z 250 motor.

700xx with a Honda Pilot motor.

Any other ideas welcome. TRX450R with 250R motor isn't an option because the 250R handles so good. There's the possibility of any of the above motors in a 250R chassis - custom.

[400ex4ever]

[i]Any other ideas welcome. TRX450R with 250R motor isn't an option because the 250R handles so good. There's the possibility of any of the above motors in a 250R chassis - custom. [/B]

What about a CR500 in a 450R Chassis?

[chris46250r]

Originally posted by 400ex4ever
What about a CR500 in a 450R Chassis?

He probably wants to be able to ride it once he is finished with it.

[danhung11]

Originally posted by chris46250r
He probably wants to be able to ride it once he is finished with it.

You would have to admit... that would be a screamer! :D

It would be a blast in the sand though....

[woodsracer144]

ok a LTR with a LTA? 500 the king quad motor... in it would be sweet... espically if you could get it a 4x4... and still have good handleing! that woud be sweet!


i would say do a yfz 450 with a YZ 250 motor if not that....

or els get a rhino and put a V 6 or a 4 banger in it! that would be sweet!

[Ogener]

The yfz with a banshee motor would be sweet, I think theres pics on here somewhere. Also I think a cr 500 motor in a 450r would be sweet, I thinks theres pics of a cr 500 motor in a 400ex chassis somewhere on here also.

[250Renvy]

Sorry guys but a CR500 motor is as far as I am concerned a waste of money and UNRIDEABLE!!! NO BIKE MOTORS. Has to be counterbalanced.

Woodsracer, I think maybe your youth shows on your reply. I don't understand what would be the purpose of putting a 500 4x4 motor in a LTR?

I was talking about the LT 500 motor the 2-stroke.

I'm leaning toward the LT500 or the Yamaha with a Tri-z motor.

[my88r]

the ktm 300 your talking about would be a great xc quad. the EXC motor that is. but like you said it has to be counterbalanced.

but the LT500 and the Tri-z motor or maybe the tecte4 motor. but the lt500 im not sure if that would make a good race quad. as for 2 hours in the woods. might where you out faster. im not sure what your going to ride with it. but i know your into xc.

also im not sure if your familiar with the gas gas 300 quad. but that motor would be another possibility.

[woodsracer144]

i just thought it would be a sweet quad... takein a sport quad thats 2wd and makein it 4 if youcould get it to handle good that would be sweet... i think it would be way better than the 700ex or what ever it is that honda made...

my next best bet would be with a yamaha yfz 450 chssie and a yz-250 motor

why would u destroy a brand new reliable 4 strake and put a old 2 stroke in it just buy the ktm quad and be done with it

[woodsracer144]

he wants the powerband of the 2-stroke... and to me the 4-stroke is over rated... something that you call your own...

[250Renvy]

2 strokes are better. They are lighter, more powerful, cheaper to rebuild, can be setup for many different applications, very customizable.

[chris46250r]

Originally posted by 250Renvy
2 strokes are better. They are lighter, more powerful, cheaper to rebuild, can be setup for many different applications, very customizable.

Amen Brother Envy, preach on.

[atvmxr]

LT 500 for sure!! there is a guy in So-Cal thats been working on them since 87 and he can make them rip and very reliable too. I have one in a LT250r and next Im putting one in a TRX250r for the ultimate power and handling combo.

I sand dragged a modded 700 raptor, him on paddles and me on knobby tires and I was just a hair faster.

:macho

[woodsracer144]

yeah i would rebuild a 2-stroke be for a 4-stroke....

[Nevada520]

What about the KTM 380? Best of both worlds possibly?

[woodsracer144]

Originally posted by Nevada520
What about the KTM 380? Best of both worlds possibly?
is that a 2-stroke? or is that a 4?

[250Renvy]

Originally posted by Nevada520
What about the KTM 380? Best of both worlds possibly?

Was that a bike?

----

I'm leaning toward the LT500 because most of the motor parts are still available and it's a powervalve motor.

[my88r]

Originally posted by 250Renvy
Was that a bike?

[woodsracer144]

yeah that would fly! why dont they counter ballance the bike motors?

[Waynoka Local]

If you want a counter-balanced two stroke, your choices are limited. The LT500R would be your best choice. The Tri-Z, YZ, and KTM engines are not counter-balanced, and they will shake like a mofo in a quad. Tudors Performance can build you an awesome 500. I've owned numerous Quadzillas, and I've never had trouble with any of them. True, people did have problems with them (and continue to do so), but most of them were seriously modified. As we all know, the more mods, the less reliability. If I was doing this, I would put a 500 into a 250R chassis. Of course, I am building a hybrid of my own, but I'm using a stroked Tecate-4 engine in a Laeger's narrow-chassis 250R. :cool:

[atvmxr]

I beg to differ. if you know what the weak points are and how to fix them, you can get excellent reliability out of a very modified LT500, 75hp + and plenty of lowend to trail ride and etc. ;)

[woodsracer144]

yeah 75 Hp in a XC quad isnt needed to me... 75Hp is more like a fast trailer or a duner...

[250Renvy]

Originally posted by woodsracer144
yeah 75 Hp in a XC quad isnt needed to me... 75Hp is more like a fast trailer or a duner...

Who said this was going to be an XC quad. If I do this as a LT 500 conversion, it will be as wide as possible and run a flat/track/ ice racing and drag setup.

The biggest problem will be finding a really good 89 or 90 motor.

[woodsracer144]

some one above said it being a XCer...

[atvmxr]

you dont have to worry about finding a 89 or 90 motor, any year will work. the 87 have a bigger intake and make more power. the issue with 6 head studs versus 7 of the later years can be fixed with bigger head studs.

i guess Im just crazy, but I love ridding this beast around in the woods, mx track, sand drags, etc. what-ever when-ever. it does it all. :D

when you get serious about starting your hybrid, check out this site to get all the LT knowledge you need http://quadracerhq.com/

[stocktires]

The LTR-Zilla idea is Sick!

[JIMFROMTEXCO]

my vote is for the tri-fz. it be the bike yamaha needed in the late 80's

[Johnny Minehan]

Originally posted by chris46250r
He probably wants to be able to ride it once he is finished with it.

LOL. yeah we had a cr motor in a 400ex chassis, neither me or my dad could kick it over we had to bump start it. it was good for drags, but after 1 run, you thought your teeth were going to fall out of your head.:eek2:

[00.400ex#55]

wtf is with people and this vibration mith about the cr500. ITS NOT THAT BAD. all you have to do is spend some time and money. alot of both. the frame has to be gusseted and many cross braces put in. my motor is solid mounted. everything else ( exaust, intake, rad) are on rubber. i can hit the trils for the day and the vibs dont bother me all that much. im not sure if i would do it again givin the amount of work it took to keep it in one peice but it is an absolute blast.

my next project is one you listed. i will be putting a banshee motor in a yfz roller next year. i think thats a better choice, and theres unlimited possibilities with a banshee motor.

http://i203.photobucket.com/albums/aa289/quadracer56/DSC00044.jpg

[250Renvy]

Well, since I started this thread I've been looking for LT500's and haven't had any luck.

So I've come across something else and I'm going to try it.

I'll keep everyone posted as soon as it comes together. What I'm going to build will hopefully be a MEGA-LITE quad. I have to do some research but there are two options I'm looking at.


I'm also going to keep my eye open for a Zilla and once the LTR frames come available I will price it out.

[atvmxr]

just rode my hybrid again the other day.. the 540 HRD LT motor has too much power from the bottom all the way to ~8500 rpm... a total blast to ride


good things are worth waiting for. there seem to be ALOT of zilla's on ebay lately....

:devil:

[atvmxr]

there are a few zilla motors on ebay right now.. :macho


FYI the best setup is a 88+ bottom end with 87 cylinder :devil:

[800screws]

u know, i agree that "was" the best combo to use, but after a little talking with doc, i realized that his engines make some much power that having the wider ratio is actually better as u don't need to shift as much, and u know his engines can pull gears! plus it was only 4th and 5th that were different, who gets into those gears anyway!

i'm actually using a 89 top end/87 bottom end!! the 87 actually made too much power for motocross and doc said the 88-up jugs will take a little hit out of the enigne.

[atvmxr]

well brian your 87 was too much power for you to handle, not for me though. haha :blah:

I think Qracer (Dan) did some tweaking to the timing and powervalve settings becuase it does not have much of hit, just goes from off-idle all the way up with no violence to speak of. and yeah i hardly use 3rd, nevermind 4th and 5th! :devil:

[800screws]

ha! i'll admit it! i wouldn't race my hybrid competively for the safety of myself and others!:D i would never have steering because the front was always in the air and i would crash into people because suzuki brakes suck! and u need alot to stop Q's engines....

i didn't even have the 540 kit, just the dune/mx job!

[atvrider23054]

how about a cannondale with the ktm 640 motor in it