Thanks for the quick reply Pleiades. I just jacked up the rear wheel to double check and the chain is still in the correct adjustment (around 50mm) with no tight spots. I purchased the kit from B & C Express who seem to have a good reputation. I regularly check the chain for lubrication and keep my scottoiler topped up. Also the front sprocket shows no sign of wear. I do drive pretty hard opening the throttle quickly and doing 100+ mph from time to time but still that's what these things are made for right?

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Now have a 2017 S1000XR Sport SE

2006 XT660X - Cat D write off due to someone pulling out on me - Pipewerx carbon fibre exhausts - Snorkel removed and airbox drilled - DNA stage 1 + 2 air filters - Kevs fuel controller mod - Scottoiler V system - Oxford heated grips - HEL braided brake hoses - Wilbers 540 rear shock - Brembo brake pads - AFAM chain and sprockets - Michelin Pilot Street Radial's - Denali DX Xtreme dual intensity spotlights