help me 250 R gurus?

[blue416ex]

i need to know what year motors parts will interchange trike and quad motors are ech year different im wondering because im going to be getting ahold of a trike 250R motor and electrical and everything for free but it needs cases and a topend

but i was wondering if any other year motors cases will fit and if i can just buy a big bore head for a 250r and it will fit it is watercooled and will run once i rebuild her it ran abourt 2 years ago then the cases cracked :rolleyes: so if anyone knows alot about 250r cases and cylinders please reply to this thread thanks

[elbine69]

the 85 and 86 atc engines are all the same as the 86-89 quad. the only difference I believe is the cranks because the atc's had the short rod cranks.

[blue416ex]

im mainly just worried about the cases and the cylinder

[matt250r21]

85 and 86 trike motors are very similar to 86-89 trx motors. Most parts will interchange with no problems. Case are pretty much the same for all years besides color and the 87-89's were beefed up in the case saver mount. Trannys for 85 + 86 trikes and trx are the same, 87-89 have different 5th + 6th main + counter gears. All the rest of the tranny will interchange. Flywheels were lighter on 85 + 86 trike + trx but all will interchange, the wire plugs may be a little different though. Cranks for 85 + 86 trikes + trx were short rod style, 87- 89 were long rod, but all will interchange with the right setup, piston + spacer plate. Kickstarter setup on 85 trike is different from all years but will work with 89 clutch cover (or 85 cover). 86 + 87 trike + trx's kicker's and covers are different form 88 + 89 trx's. Cylinders for 85 + 86 had a large intake port while 87-89 had a bridged intake, all will interchange. Clutch presser plates were a little different between all years, do yourself a favor and get the 89 update kit ( presser plate, lifter, rod + needle bearing thrust washer). Thats pretty much it, hope this helps.

[blue416ex]

thanks alot so all i will really need for the motor is cases and a topend but i may go big bore with an aftermarket cylinder just because but if i buy new cases all my parts should just go in with no problems ? im not sure what year the motor is but iknow it is a trike motor and is watercooled i think they only made this setup fr 2 years or so but the parts should just fall in the new cases when i buy them correct ?

[matt250r21]

Cases for 85 - 89 will all interchange. Go to the honda shop and give them 85 case part #'s and I'm 95% sure the will superceed to 88 - 89 part #'s for case halfs. They are all pretty much the same, 87 - 89 are the best because honda beefed up the case saver mount area on the newer cases.

I think 88-89 cases will come without bearings, and 86-87 cases come with bearing allready installed.