Ok I have 1979 rm100 and i have been trying to fix it up. It ran fine until the crank bearing shot. so it sat around for about six month until my friend gave it to me to fix up. so I got a new carb and it ran fine for awhile. all of a sudden it stop running so I looked it over and the pin in the carb was bent horablly. so i bought a new carb on **** and installed it. but after starting it once it it died and the pin was bent again. The only thing i could think of that was bending it was backfires. Eversince the crank went it has been backfiring. would that be enough to bend the needle. anyhelp is greatly apprecciated.