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Join Date: Jan 2003
Location: Cross Plains, Wis
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Crank

Now that I need to spit the cases to clean out all the debris maybe it's time to put a longer stroke crank in there. Do any of you motorheads have a crank from a R1200C (73mm stroke) you would be interested in selling or know where I can find one?

Philip

Old 06-25-2007, 02:18 PM
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Location: Castle Pines Colorado. USA
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Beemer bone yard
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Dyno'd 104Hp 74.3 ft lbs torque at the rear wheel
1150 cylinders 12:1 pistons/ race cams, Lennies induct, Laser Boxercup II Exhaust, Ohlins shocks, Dymag Carbon Fiber Five Spoke wheels, Crossover tube removed, heads ported and polished Bigger valves installed intake and exhaust! SJ power filter, motoyoyo clamps , HID
Old 06-25-2007, 03:09 PM
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EZ,

Boneyard doesn't show any cranks and all their good parts are sold. My goal is to rebuild to achieve the HP and TQ that you achieved. What cam are you using?

Philip
Old 06-25-2007, 03:16 PM
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There was a R1200 engine on Ebay last week. Not sure if it sold, but it was cracked on the mounts, making it a good parter.
Old 06-25-2007, 04:24 PM
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so what's the autopsy indicate was the cause of death?
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Old 06-25-2007, 04:32 PM
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Crap, it sold. But, maybe to someone on here?
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Old 06-25-2007, 05:00 PM
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Chris, SJBMW, believes it was a broken exhaust valve that started the destruction. If it was a cam chain tensioner failure wouldn't both intake or exhaust valves would have hit the piston and bent or broken off? How can one valve, either intake or exhaust, hit the piston and not the other? If you look at the picture of the head then you will see that one exhaust and one intake valve are still intact. So, the theory about the cam chain tensioner or valves hitting the head because of clearance problems or any other theory might not be valid.

Philip
Old 06-25-2007, 05:02 PM
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phil:
ye----ouch!
*sigh* hopefully it's just *ONE* bad part.
time for those kibblewhite valves after all, eh?

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Old 06-25-2007, 05:23 PM
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