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| Joined: | 04-07-2022 |
| Location: | Oregon USA |
| Posts: | 126 |
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Any chance the float bowl vent is clogged or capped off? The float bowl vent must be open to air. If the emissions gear has been altered the float bowl can get pressurized. Oh snap, you said that is where it is leaking, so it isn’t clogged. Another hmmm.
You might pull the plugs for the front two cylinders and inspect them. If they are black it would be a clue that something is amiss with the carb other than simple leakage, and correcting that may alleviate the leakage. Restoring any missing emissions gear might help as well.
Make certain the gasket between the carb and air box is correctly aligned and has the cutout for the float bowl vent. I occasionally come across carbs that are using SU gaskets, which do not have provisions for the vent opening or the temperature compensation, although why covering the air intake for the compensation would cause a leak is not at all obvious to me.
Rereading your post, makes me think that the gasket is not the problem, but I am leaving that thought in my post in an attempt to be thorough. You might consider posting a photo of your carb plumbing as well, sometimes another set of eyes is all it takes.
Just spitballing here. =:-o
Vance
Last edited on 11-29-2025 04:02 pm by vnavaret