Hi all,

After fitting a new clutch\water pump gasket to cure a small leak ,I ran the bike,started fine ,revved ok after maybe 2/3 minutes stopped firing (but still running very lumpy)and water entered the gearbox!!! When I remove the water pump seals etc ok removed clutch cover gasket ok,but Mick start shaft loose!!!! What's happened any ideas ????

Gasgas 125 txt pro 2009

Thanks in advance

Paul

A few things to look at. The kickstart shaft runs in a needle roller bearing in the crankcase, the shaft may just have popped out of the housing as you took off the clutch cover. Those bearings don't usually give any trouble. A photo of the kickstart shaft in the casing would help. The double sided water pump seal is not usually so easy to remove, first thing to look at when coolant gets into the gearbox is to replace the water pump shaft and seal, also have a look at the impellor as it may be damaged. If coolant is still entering the gearbox then very likely the cylinder head O rings are passing, or there is a crack in the cylinder head O ring groove. You can't just use nitrile seals for the inner O ring, these have to be Viton for heat compatibility. Bye, Peter B.

Thanks Pete I'll investigate