Quote:
Originally Posted by shreddr
The R12S does not need Lennies sprockets, I don't think any of the boxers do, they are 1200cc twins ferchristsakes. There is probably no single engine configuration that has more midrange to begin with. But if you put them in and think they help thats all that matters.
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I don’t "think" they work, I know they work, that's why I have them fitted to both of my BMW R1200 bikes. The improvement in low end smoothness and torque is invaluable to me and I expect most others as well.
Having said that, I dont see Lennies sprockets as a cure for the R12S 4.5K rpm flat spot and quirky-unpredictable throttle response. A Unifilter would be my first priority to address the flat spot followed by a temperature spoofer.
Quote:
Originally Posted by shreddr
I do know that my BCR was so over weight and underpowered that it took a rise in the road a handful of throttle and a tug on the bars to get the front wheel off the ground. The "sprockets" negated a need for the rise in the road at the cost of a perceptible loss of top end power. The R12S is a powerful motor in stock config and can be turned into a rocket with a proper ECU rewrite and exhaust. The HP2S is better still and a blip of the throttle gets the front wheel aloft in most gears.
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It seemed to me that BMW where well aware that the R12S was very prone to wheelies and used ignition timing to control that tendency. Crack the throttle too quietly and ignition advance is limitedly to control front wheel lift, nice and safe but not much fun.
Even with its long wheel base the R12S makes more than enough power to loft the front wheel, BMW deliberately intervened to limit such anti social behaviour and “make it safe”.
An ECU rewrite is probably the only way to get around that limitation.
Quote:
Originally Posted by shreddr
I have no personal mission against Lennie, but if the sprockets were the hot set-up he would be selling them as fast as China could make em.
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Lennies sprockets with a Unifilter and temperature spoofer are without doubt the “hot” set-up for a flat twin BMW, but unfortunately few people are aware of Lennies sprockets and what they do. Even fewer are prepared to go to the effort of fitting them, so little wonder they are not hot sellers.
Those who have lived with such a setup are unlikely to want anything less, I sure don’t.