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Clutch And Gearbox Oil Levels

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hi about to drain clutch and gearbox oils on bultaco sherpa 91 model, how much to put back in and best brands of oil thanks in advance for replys, took bike on road for first time to get day mot but had trouble getting high gears seems to skip gears or very close together like took to highest gear i could get but felt like still in 2nd or 3rd over revving, stupid question but it is 1 down 4 up, being used to road bikes for too long,

Yes, 1 down 4 up. The older Sherpas aren't very quick on the road

Gearbox = 600cc

Clutch = 300cc - if you have the original steel plates, use ATF

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