this post was submitted on 26 Jun 2026
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Motorcycles

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My motorcycle smells strongly of gasoline at higher rpms (and still a bit for lower RPMs). Where do I start troubleshooting first? (lemmy.world)
submitted 1 day ago by dingus@lemmy.world to c/motorcycles@lemmy.world
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Hi all. Noob here back again. I got the screws out of the front master cylinder, but I have been having a different problem.

When under higher RPMs, the bike gives off a VERY strong fuel smell. It's still noticeable at lower RPMs, but not as bad. It didn't do this initially when I got it a few months ago, but I didn't ride it much initially.

Bike is a 2017 Honda Rebel 300. Fuel injected. No carb.

I noticed that the gasket to the gas cap was a bit cracked and distorted so I got a new gas cap. Didn't resolve the issue.

There are no visible leaks anywhere that I can tell.

The smell is very strong around the gas cap and engine, not so much the tailpipe. The bike seems to run great otherwise.

Unfortunately, googling seems to show this as a very nonspecific issue, so I'm a bit lost as to where to begin. I'm a huge noob when it comes to mechanical things.

Thanks!

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[–] Nomad@infosec.pub 2 points 20 hours ago

Should be positive pressure, so nothing should get in while running. Also rain water doesn't get in either? :)