I recently restored a 1979 Cb750, had to put a new head gasket in, completely rebuilt carbs and carbs are synced stuff like that, anyway the engine runs great.
I have a mac 4 into 1 exhaust and jets are at 105 main 75 idal, ( stock is 102 main 68 idal)
But here is the problem, the plugs are white, so I go and adjust the A/F screw out to richen and it just runs worse, like hanging idal ( when the RMPs drop slowly) and the plugs are still white.
This makes no sense to me because the engine runs so good. anyway im not trying to burn up a valve, so ill see if you guys could help.
Any help will be much appreciated Thanks.
*i did set the timing static (i dont have a timing light) but i figured this would not affect it.
I have a mac 4 into 1 exhaust and jets are at 105 main 75 idal, ( stock is 102 main 68 idal)
But here is the problem, the plugs are white, so I go and adjust the A/F screw out to richen and it just runs worse, like hanging idal ( when the RMPs drop slowly) and the plugs are still white.
This makes no sense to me because the engine runs so good. anyway im not trying to burn up a valve, so ill see if you guys could help.
Any help will be much appreciated Thanks.
*i did set the timing static (i dont have a timing light) but i figured this would not affect it.
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