85 Cr125 restoration need answers

TAMBURELLO
Edited Date/Time 7/12/2013 9:53am
I always buy new bikes and try not to keep them too long.....however the restoration bug got to grips with me and I started this a few months ago.....I am almost finished

Except the motor.... I am hoping to solve the corroded magnesium w pump with a new 86 clutch cover...but the bottom end I am assembling is a 85.....Honda fische says 84-86 is the same...but there are differences for sure

so the question is has anyone here have any recollection of whether a 86 front cover will fit on a 85...anyone vouch for doing this swap ???

I know the 86 cover is deeper and will accommodate a different basket height...so I am ok there with the shorter 85 basket

Its the waterpump shafts I am concerned with... have both versions

and also I have deleted the ATAC govenor

anyone done this swap

I know the gasket and bolt patterns interchange with no problem


any advice

thanks in advance
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claclair2013
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claclair2013 7/12/2013 6:03am
7/12/2013 6:03am
Hi I also i have an 85 cr 125. With the clutch cover i understand that you have to use the 86 pump/impeller. And eric gorr says not to mix the cylinders in the late 80's bikes cause you may have the ring hanging up on the sleeve.
Chuck
TAMBURELLO 7/12/2013 8:32am
7/12/2013 8:32am
83-84 have shorter stroke cylinder looks interchangable but isnt....... crankcases different too...
smaller chamber .......85-86 interchange but the headstay on the 86 is redundant on 85

the exhaust bridge is a bone of contention on CR s it must be radiused correctly and have plenty of clearance or it will touch and with distasterous results
claclair2013
Profile picture for user claclair2013
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claclair2013 7/12/2013 9:53am
7/12/2013 9:53am
oh i understand that the shape of the heads differ 86 is round and the head on the 85 are like a pentagon shape! I was just trying to help you with you 85!

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