four stroke "R"

[01400ex]

has anyone successfully and professionally installed a 4 stroke engine on an "R" frame? just curious i have a trashed frame and will be attemting this for fun! mabe alifan 200cc kicker/e-start motor just happen to have one!!!lol

[Dirtcrasher]

Sounds like a great idea if you can fit in in there. You'd have a lightweight well suspended four stroke. I always wanted to put a Yamaha Blaster motor into a 1985 ATC250R.

[SWIGIN]

i have in trx frames...you have to lower the motor and to do this you need to spread the lower tubes

[deathman53]

I would like to put yz450f motor in an atc250r, thats my next project.

[boonis]

a wile back in a dirt wheels they had a yfz with a r motor in it and they said it ripped