Hi Neal, The phenolic spacers won't help. Trust me on this.
Pilot screws will have minimal effect once you are much above idle.
Absolutely you want to correct this soon as possible. Don't ride in the misfire zone unless you are doing diagnostics. Then do minimum as possible.
Always verify your voltage is good from battery + to EI power wire or coils if using points. Measure this hot when bike is acting up. Carry volt meter in your back pack.
Mark your throttle.
Print this & road test. We'll go from there.
My bike has a choke, I could never find lean by applying choke. I know some can, but I certainly couldn't. The tuning guide gets into telling lean by backing off throttle slightly, like 1/32 throttle & feeling if power slightly increases.
Generally lean is worse colder & better as motor heat soaks. Online it's hard to tell. Road testing with tuning guide will teach you a lot. Do you know what 8 stroking sounds like? Rhythmic misfire ah ah ah ah ah. I had to go extra rich on main jet to discover it. Then do 1 size smaller at a time. Lean does not rhythmic misfire. It will feel like loss of power or no enough power as should be.
Of course all tune up items, valve adjustment, timing. No air leaks. Make sure the crossover pipe is good & there is a bolt in the old choke bracket hole or that's an air leak.
Don
Pilot screws will have minimal effect once you are much above idle.
Absolutely you want to correct this soon as possible. Don't ride in the misfire zone unless you are doing diagnostics. Then do minimum as possible.
Always verify your voltage is good from battery + to EI power wire or coils if using points. Measure this hot when bike is acting up. Carry volt meter in your back pack.
Mark your throttle.
Print this & road test. We'll go from there.
My bike has a choke, I could never find lean by applying choke. I know some can, but I certainly couldn't. The tuning guide gets into telling lean by backing off throttle slightly, like 1/32 throttle & feeling if power slightly increases.
Generally lean is worse colder & better as motor heat soaks. Online it's hard to tell. Road testing with tuning guide will teach you a lot. Do you know what 8 stroking sounds like? Rhythmic misfire ah ah ah ah ah. I had to go extra rich on main jet to discover it. Then do 1 size smaller at a time. Lean does not rhythmic misfire. It will feel like loss of power or no enough power as should be.
Of course all tune up items, valve adjustment, timing. No air leaks. Make sure the crossover pipe is good & there is a bolt in the old choke bracket hole or that's an air leak.
Don