How to Rebuild ANY Motorcycle Petcock Fuel Switch!

This is a quick look inside a motorcycle petcock fuel switch. We explore both kinds of petcocks - vacuum and gravity style. Almost all petcocks look like this and are disassembled in the same fashion.
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[@vandal968]

No fluff, just information. VERY helpful, thank you!

[@mitaux495]

Explained perfectly, thank you from Italy.

[@edwardjames6070]

this is the way a video should be made

[@agivogue]

Thanks for the video. I was struggling to understand the difference between the vacuum style and gravity style but now it's clear. Cheers!

[@TheMarcball]

Wow, that was an excellent video. Restoring a 1-owner unrestored unmolested albeit super cruddy 1981 KZ1000 Ltd here in WA state. vac petcock looks good. I'll inspect, clean and hopefully reinstall as is. Thanks for the inspiration and keep on trucking !. (subscribed)

[@jaaahws]

Very informative! Via your video, I corrected the order of the wave washer. Thanks!

[@evangto]

Wow! Great, very informative video. I have a complete understanding now. Thanks so much!

[@franzelfelix5493]

Thank you

[@briankilby8320]

One of the the best how toos I have ever seen. Good job and looke forward to more of your videos.

[@spoiler42ify]

Very informative,thank you!

[@12591259]

very imformative, well done and thank you!

[@devonnewest7990]

Excellent vid!!!!

[@johnburke2285]

Thank you! The very last thing I did on my 17 year rebuild project.....was to rebuild the petcock on my'78 Yamaha SR500E. The Yamaha parts fische and Clymers manual did not show the vacuum assembly and I was not sure how to rebuild it. Your video made it easy.

[@scottwales5966]

Is it running now?

[@ThePerfectSeason1972]

@@scottwales5966 - well ?

[@glennvonk719]

Great video. I have the condition you discussed where fuel is flowing while the engine is not running. Looks like my vacuum diaphragm is not sealing. Rebuilding the unit now.

[@karlh4313]

Should I clean off the gasket diaphragm mine just has the one that goes on it. I have a 95 Yamaha Virago 535 with the solenoid valve on it. I cleaned mine off then sprayed it with some silicone spray to help keep it on better for rebuilding it. Is that ok? Or should I clean it with just gas or carb spray. Thanks!!!!

[@elijahbutterfield4869]

Heres a question, the new ring gasket, that sits between the tank and the petcock, keeps popping out of its groove? How do I stop that from happening? Just clamp in down into place and let it sit for a week, or do I use some sort of adhesive, or am I just supposed to be stupid quick with it and hope it doesn't pop out when I try to fit it on?

[@pistolmike791]

Hey just got 2 new bikes and I am a mechanic but I'm new to bikes. I have a bike that sat for 10 years, 05 shadow. Got it running finally by removing the black bladder inside the petcock and just seeing if that would work. It did. So I've looked everything over and replaced the vacuum lines, I do have vacuum but I don't see why the valve is t working with bladder. It looks brand new still soft and no holes

[@teaguejelinek4038]

Thank you I think my diaphragms are worn out and allowing fuel to leak out of the sides of my fuel petcock on my bike. I know I'm leaking fuel, just not 100% sure what needs fixed and from this video I am thinking I need a rebuild kit.

[@mr.nelson9396]

didn't show the diagnosis to my problem... my 77 GS550 has a hole in the middle of the diaphragm. I need to know if this whole corresponds with the air inlet on the back of the petcock. or if it should straddle in some way?

[@Unknownas1337]

Hey man. I need help. I just bught a DR650R 1995 and it has a leaking fuel tap on it. I just ordered a rebuild kit but it will take 2 weeks to arrive. I want to fix my petcock earlier. My problem is that it's constantly dripping little drips out of it on "ON" and "RES" positions. What do I need to replace exactly to stop this problem ? Thanks!!!

[@JT.559]

What do you do when there is no rebuild kit or suitable replacement? I have a 06 E-Ton Vector 250 with a petcock that has a really bad leak on the vacuum side. I tried looking on different sites but they don't make the petcocks anymore and there aren't any rebuild kits for it.

[@reginaldbeck]

There's a plate the fits between the diaphragm that has a slot .my question is does it matter what location the slot should be oriented?

[@sunnydeshpande2645]

Does anyone know where I can get a gasket that goes between the black plates of that diaphragm? I’m taking about the whitish looking square gasket. All these rebuild kits only come with the diaphragm, not the gasket, and the gasket I have is currently the issue because it’s worn out and has a hole where fuels clearly squirting out of!

[@CBDav]

Nice video but I would like to add that the vacuum petcock is very problematic and has flooded many a crankcases/airboxes...I've heard of them flooding at as little as 5 hundred miles.

[@peteg8187]

Any recommendations on where to get a petcock rebuilt kit? I have a 1979 Kawasaki KZ1000 MK2. Thanks.

[@glennvonk719]

I bought a complete rebuild kit on Amazon for $14. Fit my 82 Seca 550 perfectly. I seen no difference in quality compared to OEM.

[@JohnathanLimCheng]

How to add Key lock feature for PetCock?

[@rosesprague5369]

how do you separate the 2 diaphragms from the plastic piece?

[@LUNARIAproject]

I have the same style petcock as in 6:47, without vacuum operation. The problem I have is that it will pass gas to the carb directly as I pour it into the tank even with the petcock set in off position. I took it apart and checked it, even made a new gasket out of cork but it still will just flow gas through it as before. What could be the cause of this? I noticed that in the bowl underneath where the net is there is a small gap between the net and the middle pole, could this be the cause of the problem? Just to clearify, I've only checked this with the bike not running, don't want to try and start it when it seems that the carb is getting flooded. I never put in much fuel, just a little so I could empty it easily. Any ideas on what to check or do? I want to get a new petcock but it's hard when I ain't sure of the exact size and no shops nearby that sell bike parts. You mentioned that if the float or needle in carb is failing this could happen, but does that happen even when the petcock is in off position? It seems my petcock isn't serving any purpouse at all since the gas just passes straight through it.

[@williammoore6952]

Thanks brother! Great video!

[@sflexusford]

how to fix rotted ruber insert

[@raymondlopez4035]

Could I get by for a bit without the filter on the peacock?

[@elijahbutterfield4869]

I guess, but I would put on a second exterior fuel filter

[@MastaKeahi]

What if fuel won’t come out

[@trainmaster0217]

The video didn't show how to do the rebuild. Just showed the parts.