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piston wear

Posted: Sun Dec 20, 2009 9:56 pm
by sydduckett
Have just put the piston back in my rb20 and noticed that at the top of the piston there are 2 wear spots that correspond with the finger inlets in the barrel. There are no rough edges and you cant really feel any thing but you can see it.... :o Is this somthing i should be overley worried about? To be honest i havent go the money to get it sorted but if i wanted to would it be a case of getting the fingers shaved back or somthing like that?

Any suggestions.

Ta
sef

Re: piston wear

Posted: Mon Dec 21, 2009 2:22 pm
by soullad
When you say the wear marks line up with the finger inlets do you mean the wear is the same width of the inlets.......if so maybe some slight smoothing / profiling of the top of the inlets might help? It might just be a sharp nicasil lip left over from the plating process, thats not been removed.
There was a thread on here recently about nicasil removal - by Scooterotica's very own soap dodger I believe. :D :D sorry David, couldn't resist.

Re: piston wear

Posted: Mon Dec 21, 2009 3:37 pm
by GPMatt
you oftern have 'shiny' spots left on the piston, and the cylinder for that matter. i wouldnt be too worried if thers no raised or dipped bits.