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Petcock rebuild vs new

Started by soonerbillz, January 16, 2026, 07:05:49 PM

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soonerbillz

My LT3 petcock needs everything new. It's real messed up.
I can buy all new oem parts for it but it will cost me over 60 bucks.
 I can buy a aftermarket replacement for about 20 bucks. I haven't had the greatest luck doing it either way. Leaning towards rebuilding.
 What are you guys doing?

m in sc

gotta watch the aftermarket ones. is it a 16mm thread or flange mount?

soonerbillz

Quote from: m in sc on January 16, 2026, 08:01:36 PMgotta watch the aftermarket ones. is it a 16mm thread or flange mount?

Pipe style with a double threaded seal nut.

m in sc

probably a 16mm then  . ive had decent luck w the aftermarket ones for cb 350s etc on the smaller bikes like the yl1 & ls2. you order them dir a yamaha and its 2x the money.. but its the same part.  these are dual outlet though

soonerbillz

#4
This is the one
LT3

RDnuTZ

possible to post a picture of it? I have a couple new aftermarket ones here I bought hoping it might work on some of my dirt bikes but didn't pan out (win some, lose some, etc).

They never got mounted or ran gas through them.
1987 TZR250R Restricted Japan Domestic market bike (Project)
1977 RD400 (Project)
1974 RD350 (2) (Projects)
1973 RD250 (Project)
2022 Beta 300 X-Trainer, Yamaha Vintage MX, YZ (18)

m in sc

yup a 16mm thread. common size. id replace it.