Well guys i have my hands on one nasty built project... I scored a 88 250r for $800 a few years ago, it had lost the chain and knocked the entire shifter boss off!!! I could touch the trans w 3 fingers.. had it welded up and rockn the dunes in a day. Came w vf3's ,cool head, renthal bars moose throttle , fmf pipe and ran amazing! That was until i sprung a water leak and fried the piston.... I bought a spare motor to get me buy and its still in it.
Now for the kewl sh*t..... I looked into big hp mods for the r and found all kinds of BB kits w all kinds of prices to go w it. Then i heard about ppl putting the polaris jug on the r cases....I happen to have 2 spare polaris jugs and was well on my way to start hackin it all together when i stumbled upon another mod that seemed so much meaner, Rotax!!!!!!! i sniped a jug and piston off ebay w a good rave valve for $110 delivered and it is a masterpiece of 2stroke technology!!!!!!! Like the gods of 2 smokers had an orgy and gave birth to a sled.
I'm using a skidoo mxzr 800 twin jug, +4 hotrods trx250r crank w a rotax 670 rod, stock rotax 82mm piston, a stock rotax head chopped in half. I have to weld and tap the cases for the rotax bolt pattern, bore the cases to accept the jug, cut another transfer port in the case , weld the jug transfers to better match the r's case, weld the head closed , weld the water inlet bung on and block off part of the water passage in the jug and then assemble it all to start porting and mocking up a pipe.....
My buddy is a foreman at a weld shop and i werk at a machine shop, or else idk if it would be cheap and i know i am ,lol
current progress on it all = cases, head and jug at welders. crank needs sent off to be assembled and balanced
so far the above parts are all i have purchased and im about $433 into a motor that should have 80hp-100hp+ on a 250r chassis ... kinda gives my a chubby thinkn about it
Now for the kewl sh*t..... I looked into big hp mods for the r and found all kinds of BB kits w all kinds of prices to go w it. Then i heard about ppl putting the polaris jug on the r cases....I happen to have 2 spare polaris jugs and was well on my way to start hackin it all together when i stumbled upon another mod that seemed so much meaner, Rotax!!!!!!! i sniped a jug and piston off ebay w a good rave valve for $110 delivered and it is a masterpiece of 2stroke technology!!!!!!! Like the gods of 2 smokers had an orgy and gave birth to a sled.
I'm using a skidoo mxzr 800 twin jug, +4 hotrods trx250r crank w a rotax 670 rod, stock rotax 82mm piston, a stock rotax head chopped in half. I have to weld and tap the cases for the rotax bolt pattern, bore the cases to accept the jug, cut another transfer port in the case , weld the jug transfers to better match the r's case, weld the head closed , weld the water inlet bung on and block off part of the water passage in the jug and then assemble it all to start porting and mocking up a pipe.....
My buddy is a foreman at a weld shop and i werk at a machine shop, or else idk if it would be cheap and i know i am ,lol
current progress on it all = cases, head and jug at welders. crank needs sent off to be assembled and balanced
so far the above parts are all i have purchased and im about $433 into a motor that should have 80hp-100hp+ on a 250r chassis ... kinda gives my a chubby thinkn about it
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