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View Full Version : big red swap



philgipson
02-20-2015, 09:50 AM
i can pick up a 1985 fourtrx 250 for free.will this fit in my 86 big red or my 85 sx if i need a spare?

Trike_crazy
02-20-2015, 09:57 AM
If it's not a straight bolt in it's close, close enough to make it worth keeping if you have/find one. The only hang up I could think of is stator/pulse generator plug being different and the output shaft might not line up, if not it should be an easy enough swap. I currently have an atc 250sx, trx250 and 300 engine sitting on my floor in my garage. I could look for you later today

philgipson
02-20-2015, 11:30 AM
thanks,they look alike but i was not sure.

Jmoozy27
02-20-2015, 02:10 PM
It should be a lot of the same internal parts. Top end should swap. Camshaft is smaller but will swap.

Ol Deuce
02-21-2015, 07:30 PM
Phil if its a shaft drive it should swap!! did you do you get the whole thing?????

captainweezy
02-21-2015, 10:35 PM
Pretty sure it's a drop in motor.