400/380 2 stroke

[brewster426]

i know this isnt the hybrid forums, but has anyone ever put a dirtbike motor in a fourwheeler frame and it worked? i have heard both ways and researched it pretty heavily. im almost done with my build. im putting a ktm 380 two stroke motor in my 400. im going to rubber graumet everything, so it will sortof float? just wanting some opinions. thanks

[togup]

what exactly are you putting rubber grommets on?

[brewster426]

on the head stay and on the front side mounts. and on every mounting place on the exhaust. its more like a 3/16 thick rubber washer

[trailrider894]

Like float in water???? O.o :eek2:

[flyboy1294]

I understand what you're saying, I was hoping someone would help you out, but no one is pitching in, so I'll try to help with what little I know on the topic.

Yes, people put dirtbike engines on 400ex's all the time- no problems

There is one guy on here that put a 500cc 2 stroke from a Kawi on his 400. It's a sharp looking bike.

From what I've read, don't bother with the rubber bushings; they aren't going to help. The guy with the 500ex said that it doesn't vibrate much worse than any other quad. He said something about just looking the quad over for lose bolts before every ride.

So in short:

Yes, it'll work just fine if you do a good job.

No, don't bother with bushings, it just makes things come lose. Just tighten things down before every ride.


I hope other people can chime in and help you out bro.

[CJM]

blue loctite on the bolts would work nice.

I think the rubber bushings would help greatly, worst that can happen is they dont work and you take them off.

[trailrider894]

hey, i have a friend who did a 250r Motor in his ex frame. He used rubber gromits and stuff and it actually helped out quite a bit. Get an anti-vibe stem and that should help out greatly too!

[spark plug]

Dirt bike motors dont have a counter balance. It will vibrate=cracks,parts falling off,numb hands and feet and loose teeth. The LT500 Quadzilla motor has the balancer. Best bang for the buck!!

[MidnightBlade]

/\ /\ /\ yea what he said. we put an xr650 in my buds ex and it tore itself apart on the first ride. they vibrate and are off balance too much for a quad frame. idk why

[brewster426]

lmao no its not going to float in water. i mean where the motor will have a controlled float. i will know more by tommorow. im going to fab up the exhaust tomorrow. hopefully it will work fine. thanks for the input though.

[spark plug]

Four points of contact to the ground vs two.