Re: Resistance while clutch is pulled
If the chain is not binding in the case and the wheel stays stationary when lifted off the ground with the clutch pulled yet sometime slides on gravel, then it has to be a rear wheel or chain issue. Something is creating drag. Normal chain drag is nowhere near strong enough to drag the wheel in gravel.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.