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They move up and down fine with my finger. I ordered a leak down tester today. When I ran the bike with pipes from the airbox removed from the carbs, I saw some backfiring in the right carb. That makes me think that the right intake valve is either still partially open at time of ignition or that th...

I'm leaning more towards a fuel or valve timing problem at this point. I think the timing light not firing is due to extreme vibration on the right cylinder messing with the inductive pickup. I took the air box pipes off and was getting a little bit of fuel ignition that I could see through the back...

I did valve lash at .10 and .20 for intake and exhaust per the Clymer manual. I also cleaned out the carbs, inspected the diaphragms and replaced both needle jets and jet needles since they were a bit worn. I then synced the carbs and set the idle mixture. I have equal vacuum pressure on my CarbTune...

Hi everyone, I have a 1994 R100RT. Using a timing light, I found that the left cylinder fires consistently, but the right seems to fire half as often, fires very intermittently as I approach 2500 rpms and stops firing all together after 2500 rpms. I have replaced the spark plugs with NGK BP6ES plugs...