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Handlebar mounted Brake master cylinder on 1975 R90/6
Handlebar mounted Brake master cylinder on 1975 R90/6
- schrader7032
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Re: Handlebar mounted Brake master cylinder on 1975 R90/6
Snowbum has a big discussion on brakes here:
https://bmwmotorcycletech.info/brakes.htm
Check Section 8A where he discusses the changeover...looks like there's quite a lot of parts. An issue you'll need to deal with is getting the right diameter master cylinder to work with the ATE caliper.
Might want to consider first a swap of the brake line...see if that improves things.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
- srankin
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Re: Handlebar mounted Brake master cylinder on 1975 R90/6
But, There is a better "feel" and more "grab" with the newer system. Part of it is the elimination of the cable from the handlebar to the MC. I also believe the better performance is also due to the much better Brembo calipers. The ATE calipers with the one piston also have to be adjusted just right at the caliper for them to work their best. Where the Brembos have no adjustment along with an extra piston.
To be honest, I have toyed in my mind with changing the RS set up to the same as the RT but, I can't justify the cost and time. With the ATE system all adjusted properly, It is not a HUGE difference in braking power as far as I can see.
Now, I have been talking about a two caliper two rotor system. I would perhaps if the parts were reasonable add a second caliper and disc system to a single disc brake bike. My first bike was a single caliper ATE bike and while it had adequate braking, it could have been better. One of the reasons I traded it in for a newer bike was to get the two brake system. St.
Re: Handlebar mounted Brake master cylinder on 1975 R90/6
The only downside, is cost. The new right hand perch is expensive at around $350, plus maybe another $120 for custom SS brake lines (definitely worth it), and a few more bucks for other small misc. hardware. I ran a two line set up, going to a later K bike manifold under the tank for cleaner routing (rather than just running straight from on handlebar MC to caliper), and also so that if I were to choose a dual disc set up in the future, it would be easier to modify.
ECJ