The clutch adjustment increase & decrease is the manual clutch freeplay .. If you turn the adj screw all the way to increase then the manual clutch won't engage and the bike will shift very hard & rough .. If the screw is turned to decrease (past where it gets hard) the clutch won't dis-engage and the bike will just rev up and not move in any gear ..
Here is how Honda recommends adjusting the TRX350 clutch ..
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