engine piston check
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@Hark_Ptooie yeah its the diameter of the piston, the standard is 56.00mm if you get a bigger one you need to rebore the cylinder so that piston can fit
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Most people recommend Yamabond. It’s a silicon RTV type sealant I believe. I have used Hermatite red without any leaks or problems. I prefer it just because it doesn’t shed ‘worms’ of sealant into the gearbox. Not so important on a 2/ but can be death to a 4/ if it clogs an oilway…
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@erion1 said in engine piston check:
@Hark_Ptooie yeah its the diameter of the piston, the standard is 56.00mm if you get a bigger one you need to rebore the cylinder so that piston can fit
OK, thanks - and what would the appropriate size of the bore be? +0.1 mm? +0.5 mm? +50 µm?
I may need to swap piston in the not too distant future, and motorcycle workshops are few and far between where I live. So it may be that I will need to turn to some car shop and tell them how it should be, because they are not used to this type of engine.
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I don’t have my Haynes manual at hand, but the max recommended clearance is in there…
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Okies, thanks!
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Found it! 45-50 µm on the diameter. Wear limit 100 µm
25 µm per side is hella tight.
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Kinda pisses you off when your recently ‘rebored’ piston used to rattle back and forwards in the barrel, doesn’t it?! I had the same experience buying a REBORED barrel & piston.
I’m very particular about who does my rebores now…
