well, hi again, does anyone know the average life of the chain and sprockets? i have an xt660r, i bought it with 2000 miles on board, then around 5000 miles i fitted a scottoiler touring kit.( from 2000 to 5000 i kept the chain drive clean and greased regularly). now the bike's got about 14200 miles, happy with the scottoiler and the chain and sprockets look good. it's a 2007 bike and so far it's still on the original chain and sprockets. is it time for a change? the slack is ok aswell. then, i want to change the gearing for touring, but my dilema is to change the front sprocket from 15 to 16 t, or the rear one from 45 to 42t? if i choose the first option, do i need a longer chain? thanks

It all depends on how the bike is ridded & how well the chain is adjusted & oiled. I did 15000 miles on one of my XT's with no off road riding before replacing the chain & sprockets.

You can fit a 16T front sprocket on the standard chain.

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Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
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My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

Hi radu i have a 16tooth front sprocket that is for a 2008 xtr i believe . It would not fit my ten as the spline is not the same and it has a different offset . I am in north london . It cost me �20 but would take �10 for it if your interested ? .

hi, thanks for the reply, yes, i'm interested, leave me a phone number and i'll get in touch, i leave near heathrow, but work in central london now, but it's not a problem for me to pick it up or to meet somewhere. thanks

Radu i have sent you a PM .