SOHC.co.uk Forums > CB500/550
First Start Highs and Low!
deltarider:
--- Quote from: Neilw on September 30, 2026, 12:24:15 PM ---[...] Put more in the external tank i'm using and now i have an over flow leak on bowl 2, that no amount of tapping seems to stem the flow!.[...]
--- End quote ---
In general: do not position an external tank higher than the original tank. The higher the more pressure in fuel feed. As a consequence float valves will not close causing overflow.
taysidedragon:
You need to keep some choke on for a couple of minutes until the engine warms up enough to run without it. It will stall without any choke when cold. Gradually reduce the choke to keep the revs from rising as the engine warms.
Neilw:
--- Quote from: deltarider on September 30, 2026, 04:16:04 PM ---
--- Quote from: Neilw on September 30, 2026, 12:24:15 PM ---[...] Put more in the external tank i'm using and now i have an over flow leak on bowl 2, that no amount of tapping seems to stem the flow!.[...]
--- End quote ---
In general: do not position an external tank higher than the original tank. The higher the more pressure in fuel feed. As a consequence float valves will not close causing overflow.
--- End quote ---
Thank you. It's suspended from the ceiling joist, so well above the bike, so will try that.
Neilw:
--- Quote from: taysidedragon on September 30, 2026, 04:22:05 PM ---You need to keep some choke on for a couple of minutes until the engine warms up enough to run without it. It will stall without any choke when cold. Gradually reduce the choke to keep the revs from rising as the engine warms.
--- End quote ---
I'll try that too, with the improved fuel tank location.
McCabe-Thiele (Ted):
Ensuring the needle is in the correct position is pretty much a basic essential as is checking you have the correct needles, with the circlips all in the same position.
Assuming you are using the right size JIS screwdriver those screws should come out, as long as you have the strength to push into the screw head it should turn after soaking them in releasing/penetrating oil.
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