Honda Twins banner

Gas Leaks In Right Cylinder

695 Views 5 Replies 3 Participants Last post by  66Sprint
I left the petcock on my cm400t for a few days and found that though it was leaning left on kickstand gas had filled the opposit cylinder and I had to remove plug to let out the gas cause of pressure buildup so that it would turnover and start..
My first thought is float needle isn't seated or intake valve isn't seething. I recently adjusted valves gaps too proper specs.
Any other possibilities I might have overlooked?

1 - 3 of 6 Posts
No I did not. But it ran fine all day and will change oil tomorrow. However, what causes such a leak of gas into the cylinder, gravity? I assumed a sticking valve or float needle not seating properly.
Gotcha. Appreciate the insight. Will definitely change oil tomorrow.
1 - 3 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.