My bike makes more sound than it did in the beginning. It sounds like some metal balls at low rpm. First I thought about the big end, but there is no metal in the oil nor in the oilfilter. Adjusted the valves and the cam looks normal. Now I am thinking of the timing chain. What is the life span of it, can it make a knocking sound at low rpm, I always thought it was more of a rattle sound.

BTW it has 60.000km on it.

Interested in the out come of this, my XTR's got 42kmiles and has similar rougher sounding. Seemed to be a bit quieter when it had a service including values checked about 4k miles ago, which seems wierd to me.

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Plough on

Nobody? I will also post it in XT660R.

I'm still on original camchain at 57,000+ miles but it seemed tight enough when I checked at the weekend.

Problem I always had with previous bikes (all big singles) was the clutch basket damping springs going slack causing major clutch rattle and clatter on take up.

Listening to some comments, do the following test:

Listen to the noise with the clutch out in neutral, and with the clutch in, see if there's a difference

I would expect a XT's timing chain to last more than 80K miles, depending on how the bike is serviced & ridden.

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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