Help! 74 35mm Ceriani Fork stop valve

Started by 454MRW, August 14, 2014, 06:29:44 PM

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454MRW

In rebuilding a set of 1974 Penton Ceriani forks, I found one side of the internals to be significantly rusty, especially the stop valve that retains the wave washer that restricts the fluid to provide the proper damping under compression and releases under extension. I have purchased a set of the upgraded wave washers, but the rusted and pitted stop valve is deteriorated to the point of not being able to retain the wave washer, even after several attempts to crimp it in place. The other side if fine. Does anyone have a spare for sale, or have any suggestions? Thanks, Mike [email protected] I checked Al's site and he is sold out.





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
Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1976 Penton MC5 400
1977 KTM MC5 125
1978 KTM 78 GS6 250
L78-79 MX6 175-250 KTM\\\'s
1976-78 125-400 RM\\\'s
2007 CR125R Honda
1977 MC250 Maico
2017 KTM Freeride 250R

firstturn

Mike, have you checked with Tom at Genuine Parts?

Ron Carbaugh
Ron Carbaugh

454MRW

Yes. He doesn't have any, but thanks anyway. Mike
It looks like a job for master machinist, Bob Wardlow! Surely some others suffer from the same issue. What do you think Bob? Its steel.

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
Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1976 Penton MC5 400
1977 KTM MC5 125
1978 KTM 78 GS6 250
L78-79 MX6 175-250 KTM\\\'s
1976-78 125-400 RM\\\'s
2007 CR125R Honda
1977 MC250 Maico
2017 KTM Freeride 250R

firstturn

I will look today to see if I have any left?


Ron Carbaugh
Ron Carbaugh

Rick Bennett

I could make you one if you sent me the old one for a pattern.
Rick Bennett

rob w

Yep, I'll look for some also Michael. I know they're common enough to find, no one needs to go through the trouble of making one.
(I'll weld your silencer and get it shipped next week)

454MRW

Ron or Rob, Please let me know if you come up with one, I still have the other upgraded valve for it. Thanks, 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
Michael R. Winter
I enjoy rebuilding and appreciating Pentons!
1976 Penton MC5 400
1977 KTM MC5 125
1978 KTM 78 GS6 250
L78-79 MX6 175-250 KTM\\\'s
1976-78 125-400 RM\\\'s
2007 CR125R Honda
1977 MC250 Maico
2017 KTM Freeride 250R

rob w

Michael, The spare parts I was thinking of / looked at, are from the 1976 35mm x 225mm off-set front axle Ceriani forks. They are not the same, and do not use the part that you're looking for.

But I have the correct part you need, taken from a decent set of spare forks.
I am going to mail it to you to have, and we'll just have to keep an eye out for a replacement part in the next year or so.


 



rob w