Topic: when gas meets oil..

[mr.brandon]

Hello.  I have a "bobbed" cb750 k series engine. 1975 sohc. i had pod filters on..and wanted to put on velocity stacks and start to tinker with performance. the stacks have extremely thin filters  thereby, letting in a great deal of air and perhaps, debris as well? gas has begun mixing with oil, i took off carbs and cleaned the little barrel and pin apparatus that works the float. it was very freely moving, no damage had been done to any part of that piece or float. i know that most of the time this is the cause. before i dump a new batch of oil what else might be the case?

[scottly]

Do the "clear tube" test to determine the actual fuel levels in the float bowls...

[Black 750K8]

Hello.  I have a "bobbed" cb750 k series engine. 1975 sohc. i had pod filters on..and wanted to put on velocity stacks and start to tinker with performance. the stacks have extremely thin filters  thereby, letting in a great deal of air and perhaps, debris as well? gas has begun mixing with oil, i took off carbs and cleaned the little barrel and pin apparatus that works the float. it was very freely moving, no damage had been done to any part of that piece or float. i know that most of the time this is the cause. before i dump a new batch of oil what else might be the case?

I don't understand the fuel level in the bowel is what works the float.

[Don R]

The float controls the fuel level, you can adjust it by bending the tab that operates the little pin on the float valve. If a float valve is leaking past slightly it will flood the engine with fuel. Turn off your fuel when parked, I finally replaced my float valves and re-set the fuel levels, that fixed my problem. Mine would leak all over the shop floor if I forgot to close the petcock. Some people turn the float valve plunger against the seat to wear them in to each other. didn't work for me.

[ekpent]

As Don mentioned be sure to turn your petcock off when not in use. Your petcock may also be a 'leaker'.

[scottly]

Brandon, here is a link to one of the many threads about the clear tube test:
http://forums.sohc4.net/index.php?topic=123965.msg1408265#msg1408265