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Old 10-11-2012, 07:19 PM   #11
bmwrench
Beastly Adventurer
 
Joined: Nov 2006
Oddometer: 1,849
I have done several 1000cc conversions using OEM cylinders and 8.2:1 pistons to R80s with good results. At that time, you could buy a piston/cylinder assembly for under 400.00 (!) One of them has now covered over 100,000 miles. This bike, an '87 R80, has a 3.2:1 Rear Drive ratio and has spent a good deal of time running at 80-90 MPH. A couple of years ago, we decided to machine the heads for a better match and tighter squish clearance. This made a slight increase in performance and fuel consumption. It will pul l past redline in top gear.
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