[87-89 crank on 86 bottom end] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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87-89 crank on 86 bottom end
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Posted by: VZTech

I have decided that while my engine is apart to go ahead and put in a long rod crank. Is there anything else other than using 87-89 piston that has to be done to make it work? I read on another site that when going to long rod on 86 bottom end that gears on clutch side of engine needed changed,is this true? I did a search on here and Beerock said the best combo for reliability was the 88 oem crank and 88or 89 piston. Would most of you agree with that? This r will not be raced,I got it for another toy just to play around on. Looking for reliability and less frequent top end rebuilds. Thanks to all who reply.

Posted by: robyone

No gear changeing, short rod...86 piston.
Long rod....87, 89 piston.

Posted by: Rich250RRacer

I prefer the long rod crank with an 86 piston and spacer plate. Everybody has their own preference, but this combo has been good to me.

Posted by: beerock

quote:
Originally posted by Rich250RRacer
I prefer the long rod crank with an 86 piston and spacer plate. Everybody has their own preference, but this combo has been good to me.

I prefer this combo too rich, its just that the non spacer plate 87-89 motor were really reliable. i put over 200 hours on a 88 non spacer plate, when i tore it apart the piston looked new.