Good morning to all, I recentley just rebuilt my 93 fatboy with a 80" evo with the following: daytona twintec single fire ignition kit(ability to adjust the curve, mode, and rpm limiter(curentley set at single fire, and rpm set to 6000) e3 spark plugs 10:2:1 pop up pistons new rings manley race valve kit with up to .560 lift Head work to increase air intake and compression releases andrews Ev57 Cam lifters adjustable pushrods sampson short shots exhaust I rode the bike for almost 2k miles, but am still looseing oil some were, i guess the rings are still breaking in and trying to get seated. However that is not the issue, The problem im having is that recentley i have been hearing a slight noise upon shut off of the engine on the last stroke it makes before shut off. Now i noticed it is even louder when the bike is running when i was at a stop sign the other day, it sounded like a knock that was also rubbing. When i got it home i checked the oil to see if it was just low on oil, which it was so i add some to it. The noise is still there. Upon shutting the bike off on the last stroke the engine makes a loud mechinical noise after i have turned off the bike. I tried to adjust the primary chain tension thinking the rubing noise could have been to much slap in the chain, but it did not change anything. The bike has also not ben timed yet, because at the time i could not see past all the smoke the engine was makeing threw the timeing hole, so i wanted to let the rings set first before i timed it. The best way i can describe the noise is on the last stroke it like, clunk, clunk, clunk each one slower then the last. I have no idea were to go from here, i read in my ignition manual for the one i have that i need to advance the slope for the type of gas i run wich is 93 octane only, could that be the cause of all this?