Quote:
Originally Posted by tgold
Aluminum fatigues and stretches more easily than steel, so it requires more attention as far as the correct torque goes. I think with five six bolts you're probably safe though. If there are only four bolts on the CBR carrier then I'd probably not risk it myself. I've been looking at the cushions drive/sprocket carrier assembly and I think it is way overbuilt so I'm looking at taking some weight out of it. I'm probably going to reduce the number of bolts holding the sprocket from six to three but I'll keep them steel or titanium, reduce the weight of the casting and machine the bearing sleeve from aluminum instead of steel.
I'll also be machining a significant amount of weight out of the rear brake rotor. About the only time I use the rear brake is when I run off in the grass.
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CBR250/300 is five bolt. Had it on the bike for 15,600miles hard riding and the odd track day. Never came loose or required re-torquing. The proof is in the testing.