this post was submitted on 26 Jun 2026
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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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[–] gabmus@retrolemmy.com 7 points 1 day ago (1 children)

I am no expert but I'd try tracing the path that the fuel makes from the tank to the injectors and see if there's any leaks. The cracked gas cap gasket could suggest that other rubber parts in your bike might also be degraded.

Might be worth investigating the ICU sensors, I believe there should be some attached to the exhaust pipe. Could also be a problem with the ICU itself.

[–] dingus@lemmy.world 1 points 1 day ago (1 children)

The latter paragraph requires more specialized diagnostic equipment, correct?

[–] gabmus@retrolemmy.com 1 points 1 day ago