88bmwjeff
SF Bay Area
I rebuilt the Brembo calipers on my 1988 R100 RT. To cut to the chase, what should be the appropriate torque setting for the two bolts clamping the halves together.
Here’s what I’ve found so far….
I read through the included Brembo instructions and if I’m reading it right (they're not that clear), the two bolts clamping the two halves should be tightened to 50 nm or ±36.9 ft lb. This is not my area of expertise, but that seems high for an 8.8 M10 bolt that has a torque setting range of 25-39 nm to 18-29 ft lbs, according to Clymers. Snowbum’s sight indicates torque settings for the Brembo calipers with four bolts, but doesn’t seem to reference the older Brembo calipers with only two bolts. Brook Reams references the torque settings for the inner bolts indicated on Snowbum’s site. I have a repair manual for the airhead GS, and BMW doesn’t specify a different torque setting other than normal for the bolt type.
Here’s what I’ve found so far….
I read through the included Brembo instructions and if I’m reading it right (they're not that clear), the two bolts clamping the two halves should be tightened to 50 nm or ±36.9 ft lb. This is not my area of expertise, but that seems high for an 8.8 M10 bolt that has a torque setting range of 25-39 nm to 18-29 ft lbs, according to Clymers. Snowbum’s sight indicates torque settings for the Brembo calipers with four bolts, but doesn’t seem to reference the older Brembo calipers with only two bolts. Brook Reams references the torque settings for the inner bolts indicated on Snowbum’s site. I have a repair manual for the airhead GS, and BMW doesn’t specify a different torque setting other than normal for the bolt type.
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