Hi guys

Have a 75 year model of a CB 500 Twin

Left hand cylinder misses in ignition all the times .

Have tried the following :

New spark plug
New condenser
Timing adjusted on the clock and so the breaker points
Valve adjustment tip top
coils are okay
Right hand cylinder works fine all the time

It keeps on missing on the left cylinder ..... a new spark plug works only for a few minutes .. then it starts to miss in ignition ... then if sparkplug is taken out , - its wet of fuel and no spark is on when testing .

What the h... is wrong here ?

Im getting a serious attack of lust to smash the bike with a big hammer now ....

Any ideas ?

kr
k

 

hey
I dont know the exact bike you are talking about but il try to help.
Looks like you are fouling your left plug.
What color is the plug when you take it out? what does it smell like?
Does this bike got a twin carb setup? if so try cleanig them and tune them. Mightbe a bit rich on the left cylinder.