mikey, The '02 model came with two different swingarms, single sided and double sided. OEM gearing for the DSSA is 19T/44T, the SSSA is 18T/42T. Whether you stay with the original gear ratios or not after market parts will be less expensive than those sourced from the dealer.
Mikey, I just installed a DID chain, good kit. I 'broke it in' for the first 100 miles to keep from stretching it in sections (basically no rough downshifts or big throttle accelerations) and only have one slightly tight area. I don't really know if this helps, just my usual habit with a new chain.
Which Rear sprockets does fit the 2004 955i Daytona? I'm seeing a lot of rear sprockets that fits the 01-02 models...Do they fit also the newer one? What about speed triple, do their rear sprockets fit -04 and up Daytona?