I'm having a few issues with the tuning of a standard 1-1/8 inch carburettor on the comet. This is the first time that this carburettor has been fitted to the bike. The comet will not run between 1/4-3/4 throttle position. It will bog down (starving of fuel) here. Turning the choke on helps. The comet starts and idles easy, and is fine on full throttle but nothing inbetween. This is a fuel problem, not electrical in this case.
106 needle jet, 29/3 slide, needle in middle notch.
The total overall needle length is 3.46 inches (88mm). Is this the correct overall length? When the throttle is completely shut the needle sits approximately 1.5 inches into the needle jet.
On this forum I found an article by E.M.G Stevens (MPH 191, page 22). He states that the needle type fitted to the 1-1/8in. carburettor is "1.7/8in. overall” in length. But isn't this way too short?? At full throttle the needle would come completely out of the needle jet I would think.
Any thoughts would be greatly appreciated.
Thank you,
Brad.
106 needle jet, 29/3 slide, needle in middle notch.
The total overall needle length is 3.46 inches (88mm). Is this the correct overall length? When the throttle is completely shut the needle sits approximately 1.5 inches into the needle jet.
On this forum I found an article by E.M.G Stevens (MPH 191, page 22). He states that the needle type fitted to the 1-1/8in. carburettor is "1.7/8in. overall” in length. But isn't this way too short?? At full throttle the needle would come completely out of the needle jet I would think.
Any thoughts would be greatly appreciated.
Thank you,
Brad.