dickielumpkin Posted May 16, 2009 Report Share Posted May 16, 2009 Hello there.. Any one got any tips for replacing the gearbox oil seal (the one behind the sprocket) on 125 pro? I'm hoping it can be done from 'outside' the engine and that I don't need to split the cases to get at it. I've had umpteen GasGases over the years (my 2 sons and I ride them) and this is the first time I've had one fail (its on a 2008 125 'Racing'). Many Thanks Andy Quote Link to comment Share on other sites More sharing options...
jse Posted May 16, 2009 Report Share Posted May 16, 2009 Hello there..Any one got any tips for replacing the gearbox oil seal (the one behind the sprocket) on 125 pro? I'm hoping it can be done from 'outside' the engine and that I don't need to split the cases to get at it. I've had umpteen GasGases over the years (my 2 sons and I ride them) and this is the first time I've had one fail (its on a 2008 125 'Racing'). Many Thanks Andy Andy, The sprocket seal can often be carefully levered out without splitting the cases. Jut be very careful not to scar the surfaces where the oil seal lips ride. A large, long socket can be used as a seal installer, just tap lightly and don't try to move it too much at a time so it goes in straight. Jon Quote Link to comment Share on other sites More sharing options...
pandelboy Posted May 16, 2009 Report Share Posted May 16, 2009 theres 2 o rings in there that sit behind the sprocket bush one slightly bigger than the other make sure you replace these as well. Quote Link to comment Share on other sites More sharing options...
dickielumpkin Posted May 16, 2009 Author Report Share Posted May 16, 2009 Thanks Guys I'll give it a go in the morning...luckily we're not riding this weekend. Cheers Andy Quote Link to comment Share on other sites More sharing options...
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