I was out riding a couple days ago and after about 3 hours my bike decided it didn't want to idle anymore and when i kept on the throttle to keep it running so i could make it back, it backfired a lot. So when i took it home, i thought it must be something to do with the valve clearances. My inlet RHS and LHS clearance were within specs, now on the exhaust side, the RHS (.007) was within clearance, but the LHS was .022. So instead of the clearance wearing up, it's going down. How is this possible only on the LHS side and not the RHS of the exhaust cam?