petcocks

[Dale Sonnenschein]

What are the threads on a penton tank? 16 mm x 1.0mm ?

74 puch 175 SD
73 Husky 360 WR/RT
75 Penton 250
10 ktm 250xc
02 bmw r1150r

[Kip Kern]

I wonder how the old original cocks worked back in the day?

[G Ellis]

I will order some petcocks from Al. I will find a fix and pass it on Later Gary

[454MRW]

Other than the thickness of the "turnstyle" that rotates inside of the assembly, for lack of the correct term, I have found that on the RH side ones that do not line up correctly, or at 1:30-4:30-6:30-10:30 detent positions, instead of 12:00-3:00-6:00-9:00, the 4 indentations on the backside of the "turnstyle" that correspond with the 4 dimples on the tabbed washer that determine the detents for the lever arm are in slightly different locations, meaning the "turnstyle" was improperly cast, which also affects when the slot on the front of the "turnstyle" opens the passageways for the valve to work.
I wound up using old turnstyles in both petcocks and the new dimpled washers, and slighty longer springs, which were stock in some of my old petcocks to make up for the thinner original "turnstyles", and now I have a pair of correctly positioned and flowing petcocks, which was not possible using the NEW petcock "turnstyle", at least for the RH petcock. Mike

Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1974 250 HS Pentons-1980 KTM 175-400'S
1975 Can Am 175 TNT & 77 250 Black Widow
1979 Husqvarna OR390
1976-78 RM & 77-79 PE Suzuki's
1974 CR250M 07 CR125R 79 CR250R

[checkcrew]

Mike Winter

great diagnostic work !!!

i knew after talking with you last night you would get to the bottom of it :-)))

so old fuel valves with Al's rebuild kits should do the trick !!
i have never had a leaker after carefully cleaning the old valve and installing a new seal kit !!!

great work Mickey !!!



Mike Gallagher, NJ.
[email protected]

[Dale Sonnenschein]

My saga continues,
I found petcocks online and replaced my old ones. They are after market for husky. They are both the same so no left or right. But they flow alot of gas. I put them in and started the bike. It ran for about a minute and ran out of gas. Same problem as before. I finally got ambition to pull the carb again. I found that the float needle sticks in the seat. I cleaned everything and it still sticks. Any ideas why this happens?

74 puch 175 SD
73 Husky 360 WR/RT
75 Penton 250
10 ktm 250xc
02 bmw r1150r

[gooddirt]

The rubber tip might be distorted ,if very slight they will hang up.