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Old 5th February 2010, 04:58 PM
Big Vern Big Vern is offline
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Join Date: Jul 2008
Location: Milton Keynes
Posts: 320
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Hi Ash,
From your figures I've calculated the change in piston movement relative to the change in csa of the M/C. you should only be experiencing an increase in pedal movement (assuming std book pedals) of about an extra 1/2 an inch over the original M/C.
What free play is there? (should be nil)
Does the pedal move then stop, then continue to creep when you press really hard?
If you need a longer pushrod then that soulds like excesive free play.

Brake systems with the M/C's below the wheel cylinders are notoriously difficult to bleed so you could well still have trapped air even though you think it's all out. did you use a pressure bleed to 'push' fluid through the system or just rely on the old fashioned 'pumping with your foot' method?

Is it a new M/C or a used unit. If the used then I'm with Flyerncle on this one and would suggest dodgy piston seal.

HTH BV.
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