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timfo1
05-09-2009, 01:10 PM
i just got a complete 85 engine my question is can i use all internal parts from 86-89 except for the crankshaft.?
LONG-ROD
05-09-2009, 01:27 PM
why can you not run a long rod crank? I thought the only difference was the 5 speed tranny, good Q.
timfo1
05-09-2009, 01:42 PM
i think i can run a long rod but only with the spacer..i didnt know an 85 doesnt have 6th gear..
Dave83
05-09-2009, 02:25 PM
All are 6 speeds,you can use all parts,even the crank if you use a piston for the short rod.The 85-86 engines are the same all over.87-89 used the longer rod and 88-89 had different gear ratios for 5th and 6th.
deathman53
05-09-2009, 03:21 PM
actually the first run of 85 motors did only have 5 speeds. That series of motors is very rare. I read about it in 2 other places and a shop owner confirmed it. I read about it on 3ww ~4 years ago. The guy that started the thread used to flat track race his atc250r in 85, he got back into the sport and bought another atc250r and was suprised to find 6 speeds.
LONG-ROD
05-09-2009, 07:28 PM
defiantly some 5 speed r motors out there.
Dave83
05-09-2009, 10:42 PM
Interesting,if this is true,then I will rebut my earlier post and will take this stance,all 86-89 and MOST 85's are 6 speeds.Anyone have info on the 5 speed water cooled engines?
deathman53
05-10-2009, 08:50 AM
the guys that had 5 speed 250r motors thought that they were better and you were always in the "zone". Maybe they had a close ratio tranny? I wonder where to find more info about this. Everything I read was from another person, maybe I'll email Mike Coe and ask him about it. He knows just about everything concerning 83-87 atc's, the rare factory parts and works projects that most people would never be able to get.
trx310R#24
05-10-2009, 06:54 PM
Originally posted by Dave83
Interesting,if this is true,then I will rebut my earlier post and will take this stance,all 86-89 and MOST 85's are 6 speeds.Anyone have info on the 5 speed water cooled engines?

i have one.
Honda 250r 001
05-10-2009, 08:12 PM
a 5 speed? Take that motor out, put it in a box. and save it. IT will be worth a mint someday. if not already!!!
86 Quad R
05-11-2009, 09:53 AM
i too think i may have one....... i'm not 100% sure tho. i need to dig it out and see. i do know that it came from an '85.
Honda 250r 001
05-11-2009, 10:01 AM
Take that motor out, put it in a box. and save it!!! lolz