Author Topic: 40mm Bitubo adjustable fork dampers  (Read 552 times)

Online Turin

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40mm Bitubo adjustable fork dampers
« on: May 26, 2025, 11:43:43 PM »
One of the fork dampers on my 1991 cal III is locking up. Contributed to a scare Saturday morning.

I need at least one new damper. Here's the rub, I want to keep the adjustability of the stock dampers (the nifty dials on top , don't want the air valves)

Options? damper kit? NOS parts?

« Last Edit: May 30, 2025, 01:08:05 AM by Turin »
1998 Centauro GT
1997 Daytona RS
1991 Rennsport California III
1991 LeMans 1000
1987 LeMans SE Dave's Cycle Racer
1986 Sidlow Guzzi
1984 LeMans III
1974 850-T Sport
1969 A-series Ambassador
1996 Triumph Daytona 900
1982 Alfa Romeo GTV6 Balocco SE 3.0

Online Turin

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Re: Bitubo adjustable dampers 1991
« Reply #1 on: May 27, 2025, 12:11:48 AM »






« Last Edit: May 27, 2025, 12:19:02 AM by Turin »
1998 Centauro GT
1997 Daytona RS
1991 Rennsport California III
1991 LeMans 1000
1987 LeMans SE Dave's Cycle Racer
1986 Sidlow Guzzi
1984 LeMans III
1974 850-T Sport
1969 A-series Ambassador
1996 Triumph Daytona 900
1982 Alfa Romeo GTV6 Balocco SE 3.0

Online PeteS

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Re: Bitubo adjustable dampers 1991
« Reply #2 on: May 27, 2025, 06:54:21 AM »
This happened on my ‘76 Lemans. Almost no fork travel. I drilled the caps for schrader valves to let the trapped air out.
I planned to switch to FAC but still looking for a round tuit.


Pete

Online Antietam Classic Cycle

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Re: Bitubo adjustable dampers 1991
« Reply #3 on: May 27, 2025, 08:32:24 AM »
One of the fork dampers on my 1991 cal III is locking up. Contributed to a scare Saturday morning.

I need at least one new damper. Here's the rub, I want to keep the adjustability of the stock dampers (the nifty dials on top , don't want the air valves)

Options? damper kit? NOS parts?

Same thing happened last year to the dampers on my Cal III FF. I searched for rebuild parts, or complete dampers without success. Ended up installing FAC dampers.
Charlie

Offline Wayne Orwig

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Re: Bitubo adjustable dampers 1991
« Reply #4 on: May 27, 2025, 08:41:08 AM »
Have you tried Harpers?
Scientist have discovered that people will believe anything, if you first say "Scientists have discovered...."

Online Turin

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Re: Bitubo adjustable dampers 1991
« Reply #5 on: May 27, 2025, 09:08:24 AM »
Curtis is usually my first call. Be trying that shortly.
1998 Centauro GT
1997 Daytona RS
1991 Rennsport California III
1991 LeMans 1000
1987 LeMans SE Dave's Cycle Racer
1986 Sidlow Guzzi
1984 LeMans III
1974 850-T Sport
1969 A-series Ambassador
1996 Triumph Daytona 900
1982 Alfa Romeo GTV6 Balocco SE 3.0

Online Turin

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Re: Bitubo adjustable dampers 1991
« Reply #6 on: May 30, 2025, 01:07:04 AM »
saw an old thread about rebuilding dampers on the adjustable bitubo forks. ( bitubo rebuild kit #gr0024 )

https://wildguzzi.com/forum/index.php?topic=89277.0

1998 Centauro GT
1997 Daytona RS
1991 Rennsport California III
1991 LeMans 1000
1987 LeMans SE Dave's Cycle Racer
1986 Sidlow Guzzi
1984 LeMans III
1974 850-T Sport
1969 A-series Ambassador
1996 Triumph Daytona 900
1982 Alfa Romeo GTV6 Balocco SE 3.0


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