KR-1S.co.uk Forum

When stripping and checking the top end I noticed this-



One of the pistons is using two types of retaining clip. I've had a look in the manual and they should be simple snap rings like the one on the right.
Can a normal circlip be used?
Is it better? Worse? A bodge by the previous owner when he lost the snap ring?
Any advice gratefully received,

Mike

Don't take any chances - never re-use piston circlips - get genuine ones if you can.

You normally leave one in while stripping an engine, suspect the circlip ones happened to be lying around handily at re-build time

Brings back memories from my 50cc days Not a nice feeling emptying your piston rings out of your exhaust

Hi I'd check the groove in the piston now where the circlip sits. The design in the piston is for a round form clip, the one on the left is a square form.

Hopefully it hasn't damaged the seat so you can use a proper wire type one.

Can the one on the left, get a proper wire type one and if the piston groove is marked, get another piston.

When they come out at 10000rpm they make a hell of a mess in the barrel, the piston is cheap by comparison.

Never ever use a square form clip in a round wire groove or vice versa.

Always use new clips, and always put a rag in the crankcase until they are in and seated. You can never get the buggers out if you drop one in to the crankcase......

Very good advice, thanks chaps.
Didn't think it looked right and I didn't want to damage a really good barrel.

Mike