Thanks for posting. Funny you say this is often overlooked . Exactly my experience. I cleaned my CT110 fuel tank with POV and sealed. Rust 100% removed! Later... I'm stuck on the side of the road, and my once extremely reliable Honda... died and will not start🤔 Thankfully, I have clear fuel lines and after some time (and lots of kicking, realize that after running for a while...the fuel system is creating a vacuum. I cleaned out those little holes in the gas cap and ... 👍success! Back on the road. During the POR tank treatment, the holes had gotten partially clogged. Check the cap!
I've never seen such a thing on a CT90 but Honda DID use Metal Fuel Caps with a Manual Vent (Not "threaded" though) on their Express 50 Mopeds (78 to 82 for certain) & perhaps others. I believe Yamaha did the same - Pretty sure my 81/82 Yamahopper has, essentially, the same style cap. Both OEM.
Thanks for posting. Funny you say this is often overlooked . Exactly my experience.
I cleaned my CT110 fuel tank with POV and sealed. Rust 100% removed!
Later... I'm stuck on the side of the road, and my once extremely reliable Honda... died and will not start🤔
Thankfully, I have clear fuel lines and after some time (and lots of kicking, realize that after running for a while...the fuel system is creating a vacuum. I cleaned out those little holes in the gas cap and ... 👍success! Back on the road. During the POR tank treatment, the holes had gotten partially clogged.
Check the cap!
Thanks for taking the time to show that I found it interesting after wondering how they worked.
Thanks for sharing, Michael! All your videos and info in the Blog spots are very informative!
Glad you like them!
I saw a gas cap that had an open/close vent cap by twisting a threaded vent cap... I'm not sure if it was OEM
I've never seen such a thing on a CT90 but Honda DID use Metal Fuel Caps with a Manual Vent (Not "threaded" though) on their Express 50 Mopeds (78 to 82 for certain) & perhaps others. I believe Yamaha did the same - Pretty sure my 81/82 Yamahopper has, essentially, the same style cap. Both OEM.
Where can you get a decent replacement? Previous owner drilled holes through mine.
You should be able to find a gas cap on eBay or at a CT90 parts site like www.dratv.com