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BMW S1000RR valve train in action


by Marc Cantin ,

Check out the valvetrain on the new S1000RR superbike as the engine is run up to 14,000 rpm.

The two titanium cam followers can be clearly seen in the still shot, between the cam lobe and the spring – they are light and cost over $7US to produce, and replace the more common and heavier buckets that costs less than 25¢ to make. But they are realy light, and that is what counts!

You can also see the whole valve spring and retainer rotating at high rpm, as you see the red markings move. The red line on this engine is set at 14,200 rpm, while maximum power of 193hp arrives at 13,000 rpm.

I rode the bike on a track two weeks ago, and trust me, it MOVES!

Photo Credit : Kevin Wing