Honda-SOHC

Other Stuff => Misc / Open => Topic started by: AshimotoK0 on August 05, 2015, 07:33:36 AM

Title: Gapping oversize piston rings to standard.
Post by: AshimotoK0 on August 05, 2015, 07:33:36 AM
A CB250 twin restorer ( he sold the NOS tank and paintwork  set on eBay recently) and has an 100%  immaculate restored K4 model, advised me that I will find it difficult to locate standard size piston rings as surprisingly they are rare. He says that that he uses +0.25mm oversize rings and just gaps them accordingly in the standard bore. I have the option on 8 sets on +0.25 Genuine Honda ring sets at 20% of the CMSNL last listed price, so if it is indeed an acceptable practice, I will buy a few sets. Personally, I have never heard of it before but he says it's common practice amongst pro. engine builders.

Ash
Title: Re: Gapping oversize piston rings to standard.
Post by: Trigger on August 05, 2015, 07:41:12 AM
Yes, it is common practice. File to fit  ;)
Title: Re: Gapping oversize piston rings to standard.
Post by: Bryanj on August 05, 2015, 08:43:17 AM
).25 is only 10 thou on the bore so not much on the circumference
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