sisu Posted January 21, 2018 Share Posted January 21, 2018 Hey folks, bit of an odd one ... In the continuing job of bringing sons 125 back from storage I took the exhaust off (to de-rust and paint plus get access for other stuff) I noticed that there was no exhaust gasket. Looking at the service manual; parts exploded diagrams and the (infallible) Haynes manual it appears that there should be a copper 'o' ring. I did buy one from Wemoto in preparation for refitting the exhaust but the one supplied is a bit big to fit in the hole. 1. I am right that there is supposed to be a gasket? Never noticed an issue with it missing before and there is no evidence of gas blowing from the recessed socket. 2. I haven't checked the amount it is over by but would it be ok to sand down the copper gasket? Its a pretty chunky 'o'? Any help appreciated Link to comment Share on other sites More sharing options...
Moderator Cynic Posted January 21, 2018 Moderator Share Posted January 21, 2018 How do you mean too big. Too round or too thick. It is supposed to crush to a degree to form the seal. Link to comment Share on other sites More sharing options...
sisu Posted January 21, 2018 Author Share Posted January 21, 2018 Hi Cynic, thanks for the response. It's the diameter that's the issue - the one I have is 40mm which appears to be 2mm too large for the exhaust socket. I did order the one for a 2010 (actually cant find where I got it from - apparently wasn't on the wemoto order I did) but its looking like it might be for a different year (assuming there is a year variation). I guess I could take the Dremmel to it and shave a mm off around it Link to comment Share on other sites More sharing options...
Moderator Cynic Posted January 22, 2018 Moderator Share Posted January 22, 2018 Double check there is no cack or old gasket left in there, some are 2 rings with a material centre, the outer may still be in place. Got a part number, we can double check for you. Link to comment Share on other sites More sharing options...
sisu Posted January 29, 2018 Author Share Posted January 29, 2018 Hi, Ordered another gasket (from Womoto) and this one fitted (slightly smaller diameter, one surface flatter) ... think the first one was an eBay purchase so probably some sort of a knock off. Still no idea why there wasn't a gasket there in the first place but will be when I'm done :-) Thanks for the response Link to comment Share on other sites More sharing options...
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