ref front brake

[chubbs111]

hi guys i currently ride a vt600 imported from america to uk in 2008,ive been told by the previous owner that the bike is fitted with early gsx wheels to give the bike discs all round,when i collected the bike the front brake lever almost touches the handle bar,it looks like the master cylinder is original honda and as i said the wheels and brakes are gsx,will the master cylinder make a difference on the lever touching the handlebar or do i just need to bleed it

[Tango]

Try bleeding it first......but it may be that the mastercylinder is not up to shifting the volume of brake fluid that the GSXR calipers need.....

[chubbs111]

ive bled it and its no better but it does pump up better so new master cylinder it is

[Guest]

....all down to the volume of fluid the cylinder must shift to get the brake pistons to move....get your calculator out.....

[chubbs111]

no idea how towork it out lol

[Mickly]

The radius of you brake piston squared x Pi (2.14 should do)

X the length the piston has to travel

X the number of pistons

1 cubic centimetre = 1 millilitre

Gosh - I think my GCSE maths has finally come in to use after a trillion years

[iangaryprice]

If the master cylinder was for a single disc, it will be small diamter to provide more force to a single odsc.

A master cylinder for a twin disc bike will be larger diameter, to provide sufficient fluid for 2 callipers.

This will provide less force but the force willl be applied to 2 discs, so you gain back the braking force.

Also as stated above the size of the master cylinder has to be matched to the callipers.

I would suggest getting a master cylinder from the same model of bike that the callipers came from.

[mikestrivens]

Pi is actually 3.14 etc

[Mickly]

Pi is actually 3.14 etc

 

Typo ... honest

[mikestrivens]

Or for more accuracy a better approximate is

3.141592653589793238462643383279502884197

[chubbs111]

If the master cylinder was for a single disc, it will be small diamter to provide more force to a single odsc.

A master cylinder for a twin disc bike will be larger diameter, to provide sufficient fluid for 2 callipers.

This will provide less force but the force willl be applied to 2 discs, so you gain back the braking force.

Also as stated above the size of the master cylinder has to be matched to the callipers.

I would suggest getting a master cylinder from the same model of bike that the callipers came from.

 

the only problem is that i dont really know what bike the wheels &discs came off

[Stu]

what calipers are on the bike? have you got any pics?

a 14mm or 5/8" Master cylinder will probably do the job

the 5/8" will be a better bet in my opinion

These are the most commonly used sizes on bikes