Any experiences with high compression pistons on the R1150?

I’ve looked in to this, it’s something I would like to try, a few people have fitted high comp pistons from other models, 1100s and 1150 rs if my memory is right, I think they fitted 1100s cams as well.
If you search it should come up


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Just ordered this mag from fleabay: MO BMW Sonderheft nr.12, they talk of tuning a r1150 using a R1200 krankshaft? interesting, cant wait for it to arrive :okay
 
EdRaket said:
Just ordered this mag from fleabay: MO BMW Sonderheft nr.12, they talk of tuning a r1150 using a R1200 krankshaft? interesting, cant wait for it to arrive :okay
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I'd be interested to hear the result of that. I've heard it's possible to use the R1200C crank running R1150 top end but I've never seen anyone do it. I almost bought a cruiser block many years ago to try. I have fitted gas flowed heads running higher compression and heavily profiled R1150RS cams to a GS (well Rockster bitsa) with pretty impressive results - just under 100bhp at the rear wheel. I'll be following your progress with interest. Good luck:thumb
 
gothbiker said:
Do you mind me asking why did you have the cans re profiles to gs spec
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I’d read it again, as that’s not what was written. DrAlf added gas-flowed heads and heavily profiled 1150RS cams... to his GS/Rockster.
 
Paul Young said:
I’d read it again, as that’s not what was written. DrAlf added gas-flowed heads and heavily profiled 1150RS cams... to his GS/Rockster.
Click to expand...

That's right Paul. I maybe could have worded my response a little better. I bought some R1150RS cams which were then profiled by Piper and fitted to my 1150 bitsa. Goes well, or at least it did when I last rode it a few years ago:)
 
DrAlf said:
That's right Paul. I maybe could have worded my response a little better. I bought some R1150RS cams which were then profiled by Piper and fitted to my 1150 bitsa. Goes well, or at least it did when I last rode it a few years ago:)
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If it needs a good run out, let me know...;)
 
Paul Young said:
If it needs a good run out, let me know...;)
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I'd like that a lot. The 1150 will feel like a rocketship compared to the clonker airhead that I've been riding:) It's currently being rebuilt in Scotland and due collection soon - I could always head home via Lancs:) Will drop you a line:thumby:
 
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