chubbs111 Posted December 10, 2018 Share Posted December 10, 2018 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 Quote Link to comment Share on other sites More sharing options...
Tango Posted December 10, 2018 Share Posted December 10, 2018 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..... Quote Link to comment Share on other sites More sharing options...
chubbs111 Posted December 11, 2018 Author Share Posted December 11, 2018 ive bled it and its no better but it does pump up better so new master cylinder it is Quote Link to comment Share on other sites More sharing options...
Guest Posted December 11, 2018 Share Posted December 11, 2018 ....all down to the volume of fluid the cylinder must shift to get the brake pistons to move....get your calculator out..... Quote Link to comment Share on other sites More sharing options...
chubbs111 Posted December 11, 2018 Author Share Posted December 11, 2018 no idea how towork it out lol Quote Link to comment Share on other sites More sharing options...
Mickly Posted December 11, 2018 Share Posted December 11, 2018 The radius of you brake piston squared x Pi (2.14 should do)X the length the piston has to travelX 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 Quote Link to comment Share on other sites More sharing options...
iangaryprice Posted December 11, 2018 Share Posted December 11, 2018 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. Quote Link to comment Share on other sites More sharing options...
mikestrivens Posted December 11, 2018 Share Posted December 11, 2018 Pi is actually 3.14 etc Quote Link to comment Share on other sites More sharing options...
Mickly Posted December 11, 2018 Share Posted December 11, 2018 Pi is actually 3.14 etc Typo ... honest Quote Link to comment Share on other sites More sharing options...
mikestrivens Posted December 11, 2018 Share Posted December 11, 2018 Or for more accuracy a better approximate is3.141592653589793238462643383279502884197 Quote Link to comment Share on other sites More sharing options...
chubbs111 Posted December 11, 2018 Author Share Posted December 11, 2018 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 Quote Link to comment Share on other sites More sharing options...
Stu Posted December 11, 2018 Share Posted December 11, 2018 what calipers are on the bike? have you got any pics? a 14mm or 5/8" Master cylinder will probably do the jobthe 5/8" will be a better bet in my opinion These are the most commonly used sizes on bikes Quote Link to comment Share on other sites More sharing options...
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