Hello,
I've just recently joined this forum after buying a 2006 Superduke 990.
It's an ex Battle Cup bike, number 6 and I believe it was a Bracken press bike raced by Adam Child in 2007.
It's a great bike, HM racing tuned with lots of nice goodies on it, it's got dyno run charts with over 125 bhp at the rear wheel.
That's the good news..
The bad news is I noticed coolant loss over the 300 miles that I rode it before the winter weather, it used about 500ml of coolant in that time. After reading this and other forums about likely causes I drained the oil and sure enough, it was contaminated with coolant, it looked like milky coffee. The oil filter was also quite bad.
So earlier this evening I removed the right side casing and the waterpump shaft and it is clearly worn. There is also some mysterious scuffing and wear to the inside of the casing around were the clutch is positioned, has anyone had any experience of this sort of damage? Perhaps from a clutch breaking up?
The original clutch has been replaced with a STM slipper unit which looks to be in good shape.
Also the oil screens looked OK so the damage to the casing must have happened previously.
I'm going to let an engineer have a look at the main bearing shells in the casing tomorrow but they look ok to me.
And does anyone on here know anything about this bike, as I said it's the number 6 Battle Cup bike.
Cheers, Chris

the 950/990 motors have a known weak spot in the water pump shaft. check with CJ Designs in the US about their hardened water pump shaft kit.

can't help much on the other bits, but I have a 950 as well as my 1290 and the water pump shaft will be replaced soon by the CJ designs version. FYI I have about 12k miles on my 950 but will do it as preventative maintenance.