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Front Brake locked up after fitting ASV Leaver! |
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Posted: 27 Jul 2017 at 18:36 |
Hi, I fitted new leavers to my 2008 Tuono yesterday and riding home today my front brake locked up! Luckily I was accelerating at the time not going to fast! I managed to remove the leaver at the side of the road which released the front pads from the discs. I rode home carefully using the pretty useless back brake. Not a fun experience!
I have looked at the pushrod barrel supplied part no BRC555-B and compared to original, I also mated it upto master cylinder and it quite clearly doesn't mate up the same as the original. The drilled hole is not as deep! Have I got the right pushrod barrel or am I doing something wrong. Bike is 2008 Tuono r? |
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Can't see where I can edit post! Spelt Levers wrong and I want to add a picture?
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Tifa
Moto GP Alien I am Sparticus, only uglier Joined: 21 Apr 2009 Status: Offline Points: 1972 |
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Your brake is over adjusted, it requires about 2-3mm of free play before the lever makes contact with the plunger.
I had to take a smidgeon off my plunger when I fitted my CRG's.
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Is there anyway of adjusting the free play without taking a smidgeon off the plunger? I have resorted to replacing the ASV leaver with the original and am worried it might happen again and I might not be so lucky!
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Tifa
Moto GP Alien I am Sparticus, only uglier Joined: 21 Apr 2009 Status: Offline Points: 1972 |
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ISTR that the only way to get sufficient clearance was to take a bit off the plunger.
Obviously, don't ride it until you've done this. There are several reports of front brakes locking with disastrous results.
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Fitted original back on and bled front brake. Have emailed Asv, don't think I should have to remove material from the plunger!
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Diablo
Premium Member Joined: 29 Sep 2010 Location: Upwell Status: Offline Points: 3126 |
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Make sure your reservoir has enough room in for fluid expansion as well buddy. I'm running about a 3rd full or so.
I've got short ASV's on radial masters and they were pretty much spot on out of the box, the brake side pin and barrel should be OK and is non adjustable. It sounds like maybe when your brake fluid has got hot and expanded, if the reservoir is too full of fluid, it's had nowhere to expand to, so pushes the caliper pistons and pads, onto the disc instead. Worth a check. I think it was Spoonz that was saying there should be about 10mm free play at the end of the (standard length?) lever?? Be very careful until you know it's 100% buddy |
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Question everything.
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Spoonz
Admins Group Joined: 11 Feb 2008 Location: North Devon Status: Offline Points: 10726 |
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10mm of lever tip play is for the clutch m/c to get the right bite point.
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Diablo
Premium Member Joined: 29 Sep 2010 Location: Upwell Status: Offline Points: 3126 |
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Well I got it half right ha ha
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Question everything.
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FTM
Moto GP Alien Joined: 04 Apr 2016 Location: Lovedean Status: Offline Points: 381 |
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Where did you buy them from? I'm sure there will be fake Chinese knock off copies out there but if you got them direct from ASV then they should be okay.
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Sportsbikeshop.co.uk so would expect to be genuine!
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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You'd hope so wouldn't you
I'm using shorty ones from the Land of the Chrysanthemum on both my bikes,the ones fitted to the Mille were BikeIt branded and fitted perfectly as supplied,but the latest pair I found for the Gen2 T ( same master cylinder mind) would have put some pressure on the piston at rest just like you found As designed the brake side is non adjustable,unlike the clutch so any small differences in hole spacing in the lever body will have a big say in the operation I slightly deepened the counterbore in the barrel so I got minimal clearance on the plunger at rest,but no wasted lever movement Excellent outcome,well pleased Thanks Ray I work in the manufacturing industry with CNC machining centres and in spite of what people will have you believe it's very easy to get ( cough, um, abnormalities ) when running large batches of components as nobody does 100% inspection I laugh when I see Cnc'd as a selling point,it's mass production by an unskilled button pusher and sod the precision usually Give me hand made by a craftsman over machine made any day |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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snowman
Premium Member Joined: 27 Oct 2010 Location: Romsey area Status: Offline Points: 1385 |
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All to do with adjustment, had bother with my Pazzo short lever on the clutch side, fitted every thing exactly as in old lever but wouldn't disengage , so had to fiddle with it till it came good .
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Problem is there is no adjustment on the brake side.
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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Unless you can blag one of those CNC mills for a few minutes a drill bit is your best bet
Go gently and check often |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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If you pay for expensive levers you expect them to fit! Not impressed ASV!
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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Indeed
Big up for the Chinese then,same sh*t but a fraction of the price Worth a call looking for a refund maybe? |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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badapple
Premium Member Joined: 03 Nov 2014 Location: Norwich United Kingdom Status: Offline Points: 5608 |
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I'd definitely be looking for a replacement set or cash back. I had to change my levers last week due to a certain incident so I dug an old pair of special fry ones out of the parts bucket 10mins later all good they have done me well fitted to 3 bikes over 7 years and still work very well much better than standard levers and all for 20 quid. Don't knock the cheap alternative they're pretty decent only bettered by the full monty mc's and levers from accosato but they set me back 370 quid!
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I started out with nothing and I've still got most of it left
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legend88
Premium Member Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6597 |
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No problem Ian, glad your happy. How did the clutch one work out? |
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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That one was fine thanks,although I think I may have played with the adjustable rod a little? Can't remember now tbh
I think the Alzheimers is kicking in Nice milled from solid levers though,identical to the Bikeit ones but minus the branding so obviously massed produced and sold by many,good kit though The only thing I will say about the cheap levers compared to Brembo originals is the lack of a bushing on the pivot screw,this seems to be common on all the ones I've seen Mind you if they are lubricated and checked regularly this is not an issue,and even if they do wear at that price point one can just get another pair for a few quid |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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snowman
Premium Member Joined: 27 Oct 2010 Location: Romsey area Status: Offline Points: 1385 |
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Any progress yet ? Let us know the outcome?
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Diablo
Premium Member Joined: 29 Sep 2010 Location: Upwell Status: Offline Points: 3126 |
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Are you running axial or radial masters?
If you're using radial, I could take my ASV brake lever off and measure the pin for you, see if yours is the same? |
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Question everything.
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ianv5
Moto3 racer Joined: 26 Jun 2017 Location: Thrapston Status: Offline Points: 25 |
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Hi, radial.
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IanG
Premium Member Joined: 04 Oct 2010 Location: N Wales Status: Offline Points: 10725 |
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Have they been changed then? I thought all the 2008 Tuono's used radial calipers with axial masters and only the Rsv's using radial masters?
That's certainly the case with my 2008 T |
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www.apworkshops.co.uk
www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
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Spoonz
Admins Group Joined: 11 Feb 2008 Location: North Devon Status: Offline Points: 10726 |
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Axial M/C on all 06 > 09 Tuono's as standard
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snowman
Premium Member Joined: 27 Oct 2010 Location: Romsey area Status: Offline Points: 1385 |
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Yep mine same as yours IanG 09 Tuono ,.
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