Captain Scarlet Posted June 1, 2007 Report Share Posted June 1, 2007 Well I'm officiall annoyed, as if my trials budget hadn't gone overboard on expenses already, this may have made things worse.I started off on 2 bolt mounts (Maguras on Evo mounts), on my T-Vee. The rear brake was fine and good, only needed a few spots of tar and would hold like a beast, I also put a bit extra tar on if I wanted the brake to lock a bit intentionally. Towards the end of my T-Vee I changed to Onza Citrus pads and these worked better as I could feather the brakes as well as have them lock.Recently I bought a T-Pro frame, and put all my bits on that, obviously new mounts, new wheel and gearing.Since I've had my T-Pro built, I have been having problems with my brake not holding, Its fine if I'm pedal hopping in a line, backwheeling a wall that I can only just make, or sidehopping.However, If I backwheel a wall that I can easily do or do a big gap, or anything that results in my weight being over the back and the front end up high, then the brake has no affect at all and slips completely (resulting me falling off the back), no squeak's or anything.Same thing happens if I try backwheeling a wall higher than what I can do, on my old bike my wheel would hit the edge, weight back, and the brake would hold but slip a tiny bit (with a little squeak) due to the weight, but this was okay as the brake was working to an extent.On my T-Pro, I backwheel something higher I can go and when the wheel hits the edge, the backwheel just spins/slips even though the brake is being held, not even a squeak is produced during the slip and would normally happen.I've tried numerous different ideas but nothing has worked. (I'm running a smooth rim with tar)Cleaned the rim, cleaned the pads, changed the pads, set the brakes up perfectly, Used no tar, used normal amount of tar, used too much tar (would stick like a bitch If I did this with old bike), put tar on in the reverse direction.One thing I have invested in is a booster, I noticed my frame flexes, but I only had a cheapy flimsy Magura booster on a 2 bolt mount on my T-Vee (This still had flex in the frame).I know a couple of people with this frame and other Onza frames who had been running without a booster for a good long time, and they did not have this problem.I've ordered my booster and shall try it, but I still feel concerned that this is not all that is behind this.If its not my frame flexing then what can it be?-Tom Quote Link to comment Share on other sites More sharing options...
kid creole Posted June 1, 2007 Report Share Posted June 1, 2007 GRIND !!!!!!!!!!!!!!!!!!!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted June 1, 2007 Report Share Posted June 1, 2007 do you like your brake to pull quite far in? if so that may be the problem as if your cylnders are quite far out they may have reached their limit, causing your lack of brake.if not then i don't have a clue and that is damn weird Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted June 1, 2007 Author Report Share Posted June 1, 2007 do you like your brake to pull quite far in? if so that may be the problem as if your cylnders are quite far out they may have reached their limit, causing your lack of brake.if not then i don't have a clue and that is damn weirdI set-up my pads and slave close to the rim, so it doesn't have far to pull, but sitll getting the problem.I am running tensile mounts in the direction so the slave can go closest to the rim, meaning less strain on the pistons, and I kept to the same rule when set-up on the T-Vee.I'll consider a grind if all else fails. Quote Link to comment Share on other sites More sharing options...
Guest Posted June 1, 2007 Report Share Posted June 1, 2007 p.s it will help if he knows before tommorow so his brake works fine and dandy for the clacton ride Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted June 1, 2007 Author Report Share Posted June 1, 2007 p.s it will help if he knows before tommorow so his brake works fine and dandy for the clacton ride I ditto that lo, from the interest shown it appears I will be sidehopping most stuff tommorow.=D Quote Link to comment Share on other sites More sharing options...
Willy Posted June 1, 2007 Report Share Posted June 1, 2007 Grind the b*stard and been done. It will help a shed load and your brake will work properly as long as you've set it up right. Will. Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted June 1, 2007 Author Report Share Posted June 1, 2007 Grind the b*stard and been done. It will help a shed load and your brake will work properly as long as you've set it up right. Will.That is an option I may resort to, but it doesn't answer the question.I have the same brake, same pads, same set-up, same tar, just a different rim, but I've cleaned that and tarred it. Quote Link to comment Share on other sites More sharing options...
kid creole Posted June 1, 2007 Report Share Posted June 1, 2007 (edited) hey tom theres another thread complaining about them tensile mounts cause they dont do up tight enough so the slaves still move , maybe thats the problem http://www.trials-forum.co.uk/forum/index....showtopic=98918 Edited June 1, 2007 by Alain Quote Link to comment Share on other sites More sharing options...
THE trials commentator Posted June 1, 2007 Report Share Posted June 1, 2007 maybe its somehow got shed loads of air in it?either bleed,grind,or use standard magura 4 bolt mounts.if not,kick it...it just seems very strange to me Carl Quote Link to comment Share on other sites More sharing options...
Guest Posted June 1, 2007 Report Share Posted June 1, 2007 his brake doesnt need a bleed and he will most probably get a grind in the end as i advised this to him aswell, so cheers for the comments but still no answer lol, i also have tensile mounts and they work fine and his slaves dont slide about, so i really dont knowdoes anyone know the answer???? Quote Link to comment Share on other sites More sharing options...
Simpson Posted June 1, 2007 Report Share Posted June 1, 2007 To get a working brake all you need is- a good bled brake with the TPA out- a true central rim- booster helps- good pads- no tar- then just set you pads up perfect- and relie on TPA for ride adjustments.......Also with your T-pro ensure the cones are all done up propperly and the wheel moving from side to side could affect your brakes working Quote Link to comment Share on other sites More sharing options...
lankyri Posted June 1, 2007 Report Share Posted June 1, 2007 that does sound really weird man only thing i can think is that maybe the pad is not hittin the rim properly (angled, off the rim) try this now man before you go bedfind a 2p coin stick that between the rim and pad push the slave in so the coin dont fall out make sure all the pad will hit the rim tighten boltsadjust tpahopefully you will be riding sweetlythats all i can suggest mate,and if your running tar how would you put it on i have seen kids use tar like its a colouring in lesson when i used tar i found if u lightly put tar on so you can even see it on the rim that works a treat as too muc tar makes your brake stick too much sometimes or makes it worse in the hot weather/ rainhope this helps materick Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted June 2, 2007 Author Report Share Posted June 2, 2007 that does sound really weird man only thing i can think is that maybe the pad is not hittin the rim properly (angled, off the rim) try this now man before you go bedfind a 2p coin stick that between the rim and pad push the slave in so the coin dont fall out make sure all the pad will hit the rim tighten boltsadjust tpahopefully you will be riding sweetlythats all i can suggest mate,and if your running tar how would you put it on i have seen kids use tar like its a colouring in lesson when i used tar i found if u lightly put tar on so you can even see it on the rim that works a treat as too muc tar makes your brake stick too much sometimes or makes it worse in the hot weather/ rainhope this helps materickDone it all man, with my old bike I only put a few spots of tar around the rim and let it spread, with my current set-up I've tried that and tried using loads where it would normally stick.I'm just hoping that this booster makes a lot of difference. Quote Link to comment Share on other sites More sharing options...
steve@banbury-trials Posted June 2, 2007 Report Share Posted June 2, 2007 how long have you left the bakes set up perfectly? maybe they're still bedding in ,in the past i've had your problem ,it just takes time with some pads .steve Quote Link to comment Share on other sites More sharing options...
Joe Sheehan! Posted June 2, 2007 Report Share Posted June 2, 2007 The only things i can think of is making sure the wheel is true and grinding the rim. When you got new pads, did you file them, as they have a weird bit of compound stuff which isnt actually the pad, and it just slips all over the place. if you havent, try this, filing in a diagonal pattern, or even just scraping the pads on the floor until you cant see the shiny bit. Quote Link to comment Share on other sites More sharing options...
pengsmelly Posted June 2, 2007 Report Share Posted June 2, 2007 well i have had the same problem when i had a smooth rim but when i met the grinder trials changed for me. I GOT WAY BEETER!!!. so i advise grind it. matt Quote Link to comment Share on other sites More sharing options...
Fixed Pants™ Posted June 2, 2007 Report Share Posted June 2, 2007 how long have you left the bakes set up perfectly? maybe they're still bedding in ,in the past i've had your problem ,it just takes time with some pads .steveThis man has sense.It's probably because your rims are at diff angles somehow, so the old pad is only getting some contact. Quote Link to comment Share on other sites More sharing options...
ogre Posted June 2, 2007 Report Share Posted June 2, 2007 i'm only skimming the thread, but are you using a different rear wheel/rim? 'cause if the rim is harder/softer than your old one it'll make a difference to the brake get a grind Quote Link to comment Share on other sites More sharing options...
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