J&P Community

So is a 77 vintage? What does that make me? Don't answer that!!! My FLH backfires (frontfires?) out the carburetor at constant throttle, cruising speed, acceleration is good. Valves adjusted (solids) 1Kmi on new valve job, new plugs, wires, coil, points, condenser, counterweights, timing adjusted, new carb kit...I'm thinking that old original Klingon Carburetor has finally just worn out, but before I cough up the cash for a new S&S, I was wondering, did I miss anything?

Did you check for an intake leak? 

 yup, i guess i forgot to write that part down. I had the whole intake and everything off. new o-rings, tons of hi temp silly putty new carb gasket, blah blah blaaaah....

Dave,

  Tight valve?????????? Are they new to the engine? What is your adjusting procedure?

 by tight valve i assume you mean tight pushrod? those are OK. Adjusting procedure is strictly by the book.

and now, for my next trick, I just bought a new compression tester yesterday....

Dave,

 If  the compression is low in either cly. squirt some oil in each, and test again. If comp. comes up, you have bad rings. If it stays the same, there is a valve problem............If it's popping out the carb,That could indicate it is firing with an intake valve leaking. Did you just put a cam in it before the problem started? timing could be off with cam or ignition

 I read that you have a new valve job. If the problem started right after that i would suspect it as your problem. perhaps they arent seating properly. Rob