Recent Posts

Pages: 1 ... 8 9 [10]
91
Misc. Technical Discussion / Re: Rebuilding r65
« Last post by georgesgiralt on May 16, 2023, 02:13:52 AM »
That's easy. Move the pistons out as much as they will go. This will make TDC. Then, put the flywheel on the crank with the OT mark in the window. As the crank and flywheel have 5 screws, they are 52° apart so you can't go wrong "one screw hole"...
As both cylinders are out at the same time, it is irrelevant which one you choose to be at ignition point when you set the valves and ignition. Of course, once you have chosen one side, make a one turn of the crank to set the other side at ignition point...
Hope this helps.
92
BMW Technical Q&A, Primarily R65 / Re: F08 Brembo calipers
« Last post by Kelvin on May 15, 2023, 05:16:33 PM »
Moving from 36 to 38mm pistons could push the master cylinder ratio from responsive to wooden. This link, previously put up by wilcom, is very useful in this regard:  http://www.vintagebrake.com/mastercylinder.htm. You may want to change the master cylinder diameter to match the change in caliper piston size.
93
BMW Technical Q&A, Primarily R65 / Re: R65 (860) Brakes - 1150 upgrade?
« Last post by dogshome on May 15, 2023, 04:24:00 PM »
My shoulder problem has delayed all sorts of things. Updates coming eventually....
94
BMW Technical Q&A, Primarily R65 / Re: F08 Brembo calipers
« Last post by dogshome on May 15, 2023, 04:22:59 PM »
36 vs 38mm. I doubt this will will make any difference.

What will is the size of the master cylinder, what size pistons your ATEs have now and whether the fork sliders have the same mountings. Pipe fittings may need alteration. Have a look at RealOEM for part numbers and for your bike and say a 1983 R65 with twin Brembos (like mine). The ratio of master cylinder to calipers isn't critical, some working ranges are quoted on various sites.

Note that the twin Brembos are not fantastic. No two finger stoppies are possible! They are very reliable and need little maintenence - probably none between pads unless that is 20 years :-)
95
BMW Technical Q&A, Primarily R65 / Re: Speedometer needle snapped - now miscalibrated
« Last post by Barry on May 15, 2023, 11:28:36 AM »
This the speed cup we are referring to

96
Misc. Technical Discussion / Re: Rebuilding r65
« Last post by dfang on May 15, 2023, 03:51:10 AM »
Engine is assembled,up to pistons on con rods, fly wheel is off.
97
BMW Technical Q&A, Primarily R65 / Re: Speedometer needle snapped - now miscalibrated
« Last post by georgesgiralt on May 15, 2023, 01:25:36 AM »
Hello,
As Barry pointed out, IMHO, the cup where the magnet stays is the culprit. And it cans be a small peckle of steel aving found it's place in here and coupling mechanically the two parts insted of a magnetic one.
98
BMW Technical Q&A, Primarily R65 / Re: F08 Brembo calipers
« Last post by georgesgiralt on May 15, 2023, 01:21:31 AM »
Hello,
Maybe Tony will chime in, but mechanically, they are replaceable. But the pistons are not the exact same diameter. BMW used a unique piston size for the ATE and kept it when switching to Brembo.  This make for the premium price Brembo calipers are at the BMW dealer....
That piston difference will change braking. I can't remember in which way, though.
99
Misc. Technical Discussion / Re: Rebuilding r65
« Last post by georgesgiralt on May 15, 2023, 01:18:20 AM »
Hello !
Is the engine assembled ? Is it in pieces with the flywheel removed ?
Answer depend on the state of completeness of the engine.
Could you post a couple pictures, please ? One of the front,one of the rear.
Have a nice day !
100
Misc. Technical Discussion / Rebuilding r65
« Last post by dfang on May 14, 2023, 07:17:52 PM »
Received a bike in pieces,how do you find tdc if it wasn’t set when dismantling
Pages: 1 ... 8 9 [10]