Results 1 to 11 of 11

Thread: Clutch failure... any suggestions before I take a look?

  1. #1
    One Litre Duc Eater Paul D's Avatar
    Join Date
    Jan 2015
    Location
    Midlands (UK)
    Posts
    541

    Clutch failure... any suggestions before I take a look?

    Folks,

    Was making the most of a fun run today, when clutch ceased to work! Quite exciting riding 12 miles back home to the edge of a city without a clutch and without stopping... but made it, thankfully!

    So... any suggestions on cause and fix/cost, gladly received.

    Symptoms:

    Clutch lever works as normal, but does feel a bit heavier. Clutch fluid in reservoir. Fluid and master cylinder rubber seal were replaced last year.

    Pulling in the lever has zero effect and bike will pull/accelerate as normal! (Realising that at 70mph makes for an interesting discovery )

    I notice when lever is pulled in/out, the outer cover on the clutch assembly flexes in/out in tandem.

    Sounds like something knackered in the clutch assembly...

    All suggestions before i take a look gladly recieved!

    If it's a new clutch mechanism, any suggestions on a good quality aftermarket replacement?
    Last edited by Paul D; July 1st, 2016 at 05:09 AM.

  2. #2
    Superbike Twin 999Gav's Avatar
    Join Date
    May 2016
    Location
    Southampton
    Posts
    222
    Im wondering if the rod that goes though the clutch into the main pressure plate has popped out the other side. When you open it up you may need to replace th pressure plate.

    Pressure plate is the one with the springs holding it down, It has a rod that pushes this out to release the clutch. If the rod has somehow pushed through the hole in the pressure plate, It would then be pushing against the outer cover.

    If this is the case I would see which has failed (the rods flange has broken/Pressure plates hole is now like a holland hooker). and replace/bleed all back to normal

    I had it happen with the Ducati, I bought a fancy pressure plate that wasnt up to scratch and he rod just burst through it

  3. #3
    Evil Twin hs2300's Avatar
    Join Date
    Aug 2015
    Location
    Sheffield
    Posts
    427
    Quote Originally Posted by 999Gav View Post
    Im wondering if the rod that goes though the clutch into the main pressure plate has popped out the other side. When you open it up you may need to replace th pressure plate.

    Pressure plate is the one with the springs holding it down, It has a rod that pushes this out to release the clutch. If the rod has somehow pushed through the hole in the pressure plate, It would then be pushing against the outer cover.

    If this is the case I would see which has failed (the rods flange has broken/Pressure plates hole is now like a holland hooker). and replace/bleed all back to normal

    I had it happen with the Ducati, I bought a fancy pressure plate that wasnt up to scratch and he rod just burst through it
    +1 Gav I think you are correct with this diagnosis pressure plate bearing or rod failure

  4. #4
    One Litre Duc Eater Paul D's Avatar
    Join Date
    Jan 2015
    Location
    Midlands (UK)
    Posts
    541
    Thanks guys!

    As it's a wet clutch does the oil need draining before removing the clutch outer cover?
    - Or will oil have drained fully into reservoir if engine not run for 60+ mins?

    Why would clutch fluid need bleeding if pressure plate replaced?
    - I'm assuming the system is separate.

  5. #5
    Evil Twin hs2300's Avatar
    Join Date
    Aug 2015
    Location
    Sheffield
    Posts
    427
    Good practice to replace fluid and bleed after a major repair also if the pressure plate has broke or the push rod / Bearing's has failed the clutch slave cylinders piston may have travelled further than normal possibly to the cylinders limit and drawn air into the system.

  6. #6
    One Litre Duc Eater Paul D's Avatar
    Join Date
    Jan 2015
    Location
    Midlands (UK)
    Posts
    541
    Thanks for the pointers. Definitely a help knowing what to look out for & expect.

    Took clutch cover off tonight. I'll disassemble the M12 nut + pressure plate tomorrow.

    Looks like the bearings have worn through the inner ring of the clutch hub.
    - Or is this the flange that has worn through/broken, hence new clutch disengaging shaft required?

    Anyone else seen this before?
    What sort of mileage do these units typically last?
    Any recommended supplier, or is it best to get the Aprilia original part?

    IMG_20160704_200530088.jpgIMG_20160704_200547707.jpgIMG_20160704_200617581.jpgIMG_20160704_200636421.jpg
    Attached Images Attached Images
    Last edited by Paul D; July 4th, 2016 at 11:50 AM.

  7. #7
    Evil Twin hs2300's Avatar
    Join Date
    Aug 2015
    Location
    Sheffield
    Posts
    427
    If it was mine and I was intending on keeping the bike then I would fit genuine Aprilia parts. I guess that the failed parts are the original fit so I assume they would last the same mileage again if not more. What mileage has the bike done?

  8. #8
    One Litre Duc Eater Paul D's Avatar
    Join Date
    Jan 2015
    Location
    Midlands (UK)
    Posts
    541
    Recorded mileage is 25k. Based on research I understand this failure isn't common, but can happen as the miles clock up. Obviously, the wear occurs when the clutch is disengaged (lever depressed) - which is when the bearing spins. So, it really depends on rider style, whether clutch held in at every traffic light, or whether neutral selected and clutch released, etc...

    Perchance anyone else needs to replace one going forwards...:

    Part Number for a Tuono Gen 1 bearing is:
    - Aprilia Part Number: AP0632130
    - Actual Bearing Type Part Number (from Aprilia or any other bearing supplier): 16004

    Managed to source a bearing from Aprilia Performance, at standard price (approx 22 inc VAT). But some sellers (e.g. Ultimateparts.net - who claim to be largest UK stockist of genuine Aprilia parts) sell them at 51 (incl VAT). AF1 also sell them at the lower price (plus shipping from USA), as do apriliagenuineparts.co.uk but would have to order from Italy, which can take 5 to 10 days... with a prevailing wind...

    Aprilia don't manufacturer their own bearings and probably source from a number of approved vendors... but I agree it's best to buy Aprilia genuine... unless the alternative sourced part comes from an established quality bearing manufacturer.

    Removal of old bearing is easy, using standard process of suitably size sockets and soft mallet (or threaded bar with suitably sized washers + nuts.

    HTH's someone else...

  9. #9
    Superbike Twin 999Gav's Avatar
    Join Date
    May 2016
    Location
    Southampton
    Posts
    222
    Shouldnt need a new shaft, Just rest the bearing on something with the rod hanging, then tap the rod with a punch and mallet, It will pop out.

    As for the bearing, Get a new one, they're cheap and simply push in from the 'Inner' side, Then its just a case of reassembling.

  10. #10
    One Litre Duc Eater Paul D's Avatar
    Join Date
    Jan 2015
    Location
    Midlands (UK)
    Posts
    541
    All done/sorted.

    Original bearing (almost certainly fitted by Aprilia) was marked 'FMB' 'Portugal'. Replacement was allegedly an Aprilia original part, and marked 'SKF' 'Italy, which is a well known bearing brand.

    So. Point is, any 14006 bearing from a reputable supplier will be fine, and probably cheaper than buying via Aprilia.

    PS: as bearing had worn apart, inner ring cames off, leaving outer ring in the clutch basket. Had it been fully pushed in it would have been virtually impossible to get a purchase on it, to press it out. But thankfully, it was already 4mm out of the housing so I could tap it out, working around the edge with a screw driver and mallet. The bearing fell apart as I removed the shaft, but also thankfully, all 11 bearings were still there and I picked them out with a magnet before they rolled down into the crank casing!
    Last edited by Paul D; July 7th, 2016 at 05:23 AM.

  11. #11
    One Litre Duc Eater
    Join Date
    Mar 2012
    Location
    southampton area
    Posts
    936
    Well done P/D , out you go and enjoy!

Similar Discussions

  1. dash light failure on 2006 Tuono R
    By stewiew1985 in forum Mechanical and Technical
    Replies: 4
    Last Post: November 27th, 2014, 01:15 PM
  2. stator failure #2
    By bonzerjoe in forum Aprilia Tuono 1000
    Replies: 7
    Last Post: May 22nd, 2014, 02:32 PM
  3. Button failure
    By Crisis in forum Aprilia RSV Tuono
    Replies: 6
    Last Post: June 29th, 2011, 12:37 PM
  4. Bridgestone Apologizes to Dani Pedrosa for Motegi Tire Failure
    By Asphalt & Rubber in forum Motorcycle Talk
    Replies: 0
    Last Post: April 29th, 2009, 10:09 AM
  5. Rear Wheel Bearing Failure?
    By adamski49 in forum Aprilia RSV Tuono
    Replies: 15
    Last Post: October 24th, 2008, 10:09 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


SEO by vBSEO 3.6.1