Hi,

The 2012 gasgas 300 racing i have has a slight leak coming from either the sprocket shaft oil seal or the gear change oil seal,

John lee mcs kindly sent me the o rings, and everything i need to replace them, (bought it from them last month, they offered to do it, but i said id do it at my leisure to save time and getting it back over there)

Before i start, has anyone done it before, and any advice?

Thanks

I have and I believe they are the same as on the ossa. Firstly you need to figure out which is leaking unless you are just going to do both anyway. Just be careful getting the old seals out. Once out choose a correct size socket to install the new. If it is only the o rings they are very easy and just fit over the countershaft in the collar

All done. Very easy, and i did both sprocket and gearchange seal. Lets hope that fixes it!