Hi everyone,

Purchased my pro 250 new in June, the back brake was perfect until recently when it started to just about hit the frame when pressed. It always had a fair bit of travel anyway.

I bled it properly and it was good again (still a fair bit of travel), a month or so on and 5-6 rides and it's getting back towards the frame, no visible leaks anywhere. Is it acceptable to adjust the push rod further up into the master cylinder? There is a fair bit of slack there, however there is no locking nut on this, just the nut to raise or lower it.

Thanks

Hugh

You can adjust the pushrod to take up the slack BUT the internal piston must come all the way out to the circlip. The reason being it has to come all the way back to replenish the fluid inside.

Try putting a spot of tipex on the nut and rod to see if its rotating itself loose.

Edited September 25, 201213 yr by tazz229

Excactly same problem as my brothers bike. Tried bleeding, new master, new hose.. Problem didnt go away until fitting an AJP slave.. :-(

-Jan

jandyb, when you say ajp slave, do you mean an ajp brake calliper?

Yes thats what I mean. (Was thinking a bit car here ;.) )

-Jan

Looks like you are not the only one with problems..

http://www.trialscentral.com/forums/topic/42803-i-have-given-up-on-formula/

Thanks Jan. I'll have to look into changing out the calliper then, looking quite expensive though!

Well... could be worth trying to get the dealer to sort it out..? :-)

Almost new... more with same problem etz..

Just clearing up one thing, about the brake adjuster, the nut you see it is the jam nut, least it is on all the bikes I own.

2 things have been reported,

One was before AJP lost the fight to be solvent. I am pretty sure it was my 2008 Raga and many guys of that year bike, had to rebuild the master cylinders, without many hours from new, for a torn o-ring. I didnt own the 08 raga, I think my dad had our dealer check it out and he did the work. I think it is really easy to check this, there is a Circlip and get the pluger out and check? might be able to do on bike, with tank off, laying on side?

then there are the "several" the Formula problems, (link given by jandyb above) of which I have only seen people provide links to, BUT, since I dont have any formula brake bikes, I haven't read those... yet.