Pete Fisher
2010-04-01 20:28:35 UTC
If it's not broke then don't fix it right?
The day started well with the arrival of a Talon 42t rear sprocket for
the YZ250. That was soon deployed, though it needed another couple of
links taking out of the chain. If it should prove too high, I can always
go down one or two on the front sprocket.
Next on the agenda was the binding front brake. So I adopted my usual
strategy of getting the caliper off, removing the (new) pads and working
the pistons out, cleaning them up then smearing with a bit of rubber
grease and then pushing them right back in - followed by several cycles
of pump out a few mm and push back in.
They were a bit sticky at first, but after a few iterations they were
both moving in and out nice and evenly. Put the caliper back on, spin
wheel, apply brake - nothing. Much, pumping of the lever failed to
produce any pressure at all. I've been meaning to change the fluid since
I put the new disc and pads on, so this now seemed essential.
At least the two horrible little cross-head screws holding the master
cylinder reservoir cap on came out easily (unlike the lad's YZ85 - but
that's another story). Oh, fuck, the fluid was like Quink. Poped on my
one-man brake bleeding kit and cracked open the bleed nipple on the
caliper and tried to pump the old fluid out. A feeble dribble of ancient
fluid resulted rather than an impressive squirt. I suspect some shite in
the fluid has got pushed back up in to the hole in the reservoir. A
master cylinder rebuild wasn't supposed to be on the agenda. I'll give
it a go with the existing seals (which don't look too bad) and nice new
fluid and I've ordered a new piston and seal kit, but it's looking like
I won't get to Loton on it on Sunday. Which is a tad annoying, because I
was able to ride it OK at Hartland even with a slightly binding brake.
The day started well with the arrival of a Talon 42t rear sprocket for
the YZ250. That was soon deployed, though it needed another couple of
links taking out of the chain. If it should prove too high, I can always
go down one or two on the front sprocket.
Next on the agenda was the binding front brake. So I adopted my usual
strategy of getting the caliper off, removing the (new) pads and working
the pistons out, cleaning them up then smearing with a bit of rubber
grease and then pushing them right back in - followed by several cycles
of pump out a few mm and push back in.
They were a bit sticky at first, but after a few iterations they were
both moving in and out nice and evenly. Put the caliper back on, spin
wheel, apply brake - nothing. Much, pumping of the lever failed to
produce any pressure at all. I've been meaning to change the fluid since
I put the new disc and pads on, so this now seemed essential.
At least the two horrible little cross-head screws holding the master
cylinder reservoir cap on came out easily (unlike the lad's YZ85 - but
that's another story). Oh, fuck, the fluid was like Quink. Poped on my
one-man brake bleeding kit and cracked open the bleed nipple on the
caliper and tried to pump the old fluid out. A feeble dribble of ancient
fluid resulted rather than an impressive squirt. I suspect some shite in
the fluid has got pushed back up in to the hole in the reservoir. A
master cylinder rebuild wasn't supposed to be on the agenda. I'll give
it a go with the existing seals (which don't look too bad) and nice new
fluid and I've ordered a new piston and seal kit, but it's looking like
I won't get to Loton on it on Sunday. Which is a tad annoying, because I
was able to ride it OK at Hartland even with a slightly binding brake.
--
+-------------------------------------------------------------------+
| Pete Fisher at Home: ***@ps-fisher.demon.co.uk |
| Voxan Roadster Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
| Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
+-------------------------------------------------------------------+
+-------------------------------------------------------------------+
| Pete Fisher at Home: ***@ps-fisher.demon.co.uk |
| Voxan Roadster Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
| Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
+-------------------------------------------------------------------+