braking caliper on stock pump?
Posted February 03, 2006 - 06:22 AM
I have been bleeding air out of the system in every way i know and not know of, and still i can pull the brake lever into the handlebars without problems...
The brakes works ok, alot better than stock, and engages somewhere around the middle of the lever travel, but i thought it should be a little heavy to squeeze the lever all the way to the bars??
Is this common, and will not be better without changing pump, or is this a sign for still being air in the system?
Posted February 03, 2006 - 10:40 AM
Posted February 03, 2006 - 12:27 PM
Posted February 03, 2006 - 02:25 PM
Should that fail, the mastercylinder is very east to rebuild. The rebuild kits from the Honda CR's (99 and newer) work much better and are 1/2 of the cost that Yamaha charges.
Posted February 03, 2006 - 03:17 PM
Posted February 03, 2006 - 11:26 PM
I have been bleeding air out horisontal, vertical, upside down, straight line, bending the line and every other way in between.. I`ve run over 2 litres of brake fluid through the system now.. I also had a motorcycle mechanic to come by to help me (friend of mine) but this was the worst he had ever seen.. Sadly they didnt have a tool like indy refered to here..
I THINK the air is around the pistons on the "back side" of the caliper, since the pistons on the bleed screw side are the ones that moves the most.. Perhaps it has nothing to do with this at all though..
Posted February 03, 2006 - 11:28 PM
Posted February 04, 2006 - 12:19 AM
- new SS front cr routed line
- master cylinder kit
- new fluid
- bled everyway in the world
nothing has worked
Posted February 04, 2006 - 05:59 AM
Posted February 04, 2006 - 08:03 AM
Posted February 07, 2006 - 09:44 PM
Still thinking that the Braking caliper is so much bigger than the stock, that the master cyl is`nt big enough to get a firm feel..
When i let the bike stay overnight, and then test the brake lever, its exactly the same on the first (and second/third etc) press the day after.. In a car, you often get a softer pedal at your first press, then it gets harder on the next, if it`s air in the system.. My bike is the same if i press 1 or 20 times..
Posted February 08, 2006 - 04:51 AM
Posted February 08, 2006 - 06:23 AM
What diameter are the pistons on the new caliper and are they 4 active pistons design or 2?
Not shure of the piston size, but its a 4 piston caliper..
Braking came with a brand new 4 pot caliper this year, but i`ve got the old type..
Posted February 08, 2006 - 07:37 AM
As you say you may need a larger master piston with at least a 19mm diameter like this Brembo unit to get the volume to move 4 pistons:
Brembo recommends a 2 piston 28 to 34 mm diameter caliper for super motard.
See Brembo web site for more info: