After my last carb clean I thought I'd beaten it as the bike now runs and ticks over off-choke and generally sounds pretty sweet, however on a test ride it quickly becomes clear there still is a fuelling issue. Previously I had also swapped out the fuel tap, as these clog almost as well as jets, so this time I am getting serious and completely stripping the carb and running through an Ultrasonic Cleaner.
An ultrasonic cleaner uses high-frequency sound waves (typically 40 kHz to 49 kHz) to agitate water or cleaning solution, creating microscopic cavitation bubbles that scrub dirt, grease, and tarnish from intricate surfaces and crevices. It looks like a small fryer complete with mesh basket for the parts and are relatively inexpensive.
The cleaner itself uses de-ionised water or a very mild cleaning agent can be set for temperature and time, I went for 40 degrees and 20 minutes.
In preparation I completely stripped the carb down, small parts were placed in a bag with fluid inside so they didn't fall through the mesh basket. I removed o-rings, and I noticed the float bowl seal had gone brittle and snapped so this will have to be addressed. Lastly I have heard of anodising getting stripped if left to long, so for safety I decided to clean the slide by hand.
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| small items like jets were placed in a bag with fluid inside so not to fall through the mesh. |
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| fuel residue free |
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| rebuilt |
The cleaner I used was at my work, however if like me you have multiple bikes that are used infrequently I think I'll get one for the garage as modern ethanol fuels just don't last.
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