hi, new to the game and wondered whats wrong with bike- Sherco 250 2007 vintage, it smokes pretty badly and when i change the gearbox oil there is only about 250cc comes out, despite draining and filling it with 450 every 20-25 hours of riding! what can let the bike burn gearbox oil?

hi, new to the game and wondered whats wrong with bike- Sherco 250 2007 vintage, it smokes pretty badly and when i change the gearbox oil there is only about 250cc comes out, despite draining and filling it with 450 every 20-25 hours of riding! what can let the bike burn gearbox oil?

The crank seal has probably gone

Best to order you a pair of the Viton seals fron Chris at Splatshop.

Seals come out the sides with clutch side and magneto removed so requires some tools and expertise.

Best to order you a pair of the Viton seals fron Chris at Splatshop.

Seals come out the sides with clutch side and magneto removed so requires some tools and expertise.

thanks, a local bike shop has quoted me 2 hours labour plus parts to fix it if i bring him the engine unit from the bike,

thanks, a local bike shop has quoted me 2 hours labour plus parts to fix it if i bring him the engine unit from the bike,

No need to remove motor, sounds ok, though you need to order in the special Viton seals if possible, day or two in the post won't kill you.

Get a clutch cover gasket as well in the case the original tears during removal.

On second thought, if they told you to remove the motor, you might want to select someone with more Sherco experience, such as a local dealer or experienced rider.

Edited March 1, 201115 yr by copemech

thanks, a local bike shop has quoted me 2 hours labour plus parts to fix it if i bring him the engine unit from the bike,