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Water pump gear crisis

Posted: Wed Oct 06, 2021 8:33 pm
by Write2Paul90277
Ah, yes, the elusive OEM nylon water pump driven gear -- fragile, fickle and nearly impossible to find.

I'm in search of said gear (17522-31031) and the only one I've found costs $217 US on eBay.

I found one guy in the US who makes/sells machined aluminum ones for $120 US -- a bargain by comparison.
https://chrislivengood.net/product/gt75 ... pump-gear/
I contacted him through his website but have not heard back yet.

Has anyone found any other sources for OEM or aluminum water pump gears?

Thanks much,

Paul

Re: Water pump gear crisis

Posted: Wed Oct 06, 2021 10:40 pm
by Alan H
Aluminum? We only have Aluminium here.

Re: Water pump gear crisis

Posted: Thu Oct 07, 2021 8:00 am
by BAZ
Don't worry always split never fail I have built 150 Kettle engines.

Re: Water pump gear crisis

Posted: Fri Nov 05, 2021 3:26 pm
by Twowheelman
Legend motorcycles has them for £70 on ebay

Re: Water pump gear crisis

Posted: Fri Nov 05, 2021 3:35 pm
by Write2Paul90277
Thanks! I found the listing and ordered one. What a relief to know I won’t be gambling on using my old, cracked gear and wondering when the time bomb will explode!

Trivia question: Is it my failing memory, or do I recall hearing that some guys have removed the water pump altogether and relied solely on thermosiphon action to keep the engine cool?

Curious minds want to know!

Re: Water pump gear crisis

Posted: Fri Nov 05, 2021 5:20 pm
by Twowheelman
I wouldn't think so buddy, IMHO the Kettle would boil at the cylinder head :lol: :lol: :D