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Post by mellow on Jul 18, 2019 18:41:29 GMT 1
Fitted them in my F2. Rebore done by grampians and they supplied mitaka pistons with RK rings.
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Post by stanlc7189 on Jul 19, 2019 23:23:59 GMT 1
I omitted mine last time I changed the rings after I noticed the expander rings were in several pieces when I removed the old ones. Fortunately none of the bits were ingested into the engine. Also, I can't say I've noticed any additional noise due to piston slap. Not worth fitting in my opinion. As for the expander rings centralising the piston in the bore, isn't that what the rings do anyway as part of their job?
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Post by bid on Jul 28, 2019 13:02:01 GMT 1
Never fitted them in over 30yrs with no issues, when ive bought 2t bikes and renewed top ends these expander rings are nearly always broken, thats why i dont fit em,😉
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Post by steeley on Jul 28, 2019 13:13:06 GMT 1
Stopped fitting them years ago . Have engines that run like swiss watches , but still cant tell the time from one.
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