Lancia Motor Club Forum Banner
13 December, 2019, 12:34:00 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Search Calendar Register  
Pages: [1]   Go Down
  Print  
Author Topic: Aprilia clutch slip  (Read 1247 times)
0 Members and 1 Guest are viewing this topic.
davidwheeler
Permanent resident
**
Offline Offline

Posts: 1084



« on: 16 May, 2009, 08:22:13 AM »

NS 1692 has a second series clutch to go with her enlarged engine.  At first all was well but recently it has started to slip.  When I had the gearbox out to correct second gear (it only fits on the shaft one way otherwise the detent pin is blocked) I checked it out and there was no obvious problem, ie good plate flat surfaces and no sticking and nothing blocking the return of the withdrawal race.  I guess weak spring?  Before I drag it out again, has anybody any advice or a supply of stronger springs?  It would probably be easier with the first series clutch with its external coil springs but the plate is much smaller and would not transmit the power I think and in any case would upset my beautiful Vibration Free balance.
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
ben
Megaposter
*
Offline Offline

Posts: 456


« Reply #1 on: 18 May, 2009, 10:15:04 PM »

I went to Turin in '81 in my Citroen DS23 Safari because of chronic clutch slip in my S1 Aprilia (en-route to the ferry!).I eventually cured it by changing the gear-box although I never put my finger on exactly why that particular box allowed its oil to get onto the clutch.Many years later I up-rated to a S2 engine but have always retained the S1 clutch (with its hair-pin springs around the rim) and have had no problems despite the big increase in torque.
In the dim and distant past the cure(??) for slip due to oil contamination was to introduce Fullers Earth.If you were able to do this(access might be difficult on the Aprilia) it might show if oil on the plate is the problem.
All the best
                 Ben

 
Logged
JohnMillham
Rebel Poster
*
Offline Offline

Posts: 927



« Reply #2 on: 19 May, 2009, 07:37:44 AM »

Another way is to squirt the contents of a carbon tetrachloride fire extinguisher on the clutch, but do it in the open and don't sniff it!
 Regards, John
Logged
davidwheeler
Permanent resident
**
Offline Offline

Posts: 1084



« Reply #3 on: 19 May, 2009, 07:50:25 AM »

Trouble is, there was not any oil on the plate when I took it apart and gave it a clean anyway - to no avail.
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
davidwheeler
Permanent resident
**
Offline Offline

Posts: 1084



« Reply #4 on: 28 May, 2009, 06:25:52 PM »

Curiously, after I had rebuilt the front axle and took her out for a test drive the clutch forgot to slip.  It still has not remembered so I wonder if splines were stiff or something...
Logged

David Wheeler.  Lambdas, Aprilia, Fulvia Sport.(formerly Appia and Thema as well).
Pages: [1]   Go Up
  Print  
 
Jump to:  

Contact the Forum Administrator

LMC Forum copyright © 2007 - 2018 Lancia Motor Club Ltd

Powered by SMF 1.1.20 | SMF © 2006-2011, Simple Machines