gearbox oil 250 lc

[davey]

hi all,
what grade oil is the best for the gearbox on me 250 lc.
can i use a good engine oil ie semi or fully synthetic, and any tips on flushing out and a good interior clean after draining before replacing with the new oil would be much app,thanks

Dave

[bare]

GL4 gear oil 75/85 w

[Norbo]

If your not taking of the casing and just draining from the sump bolt then i would do it after a ride get it nice and worm then do it .
Id use any good quolity Light gear oil i use MOTUL Transoil 10W30 and Transoil Expert 10W40 depending on the bike.

[stanlc7189]

I've just put in Castrol GPS 10W40 synthetic m/c engine oil following a re-build. Same stuff I put in my GSX-R750k5. Supposedly good wet-clutch performance. I've had no problems in the Gixxer's gearbox/clutch dealing with 150 bhp, so 47 bhp going through the Yam's gearbox shouldn't create any problems.