Hi can someone advise me, I am going to do a chain and sprocket change on my XT660R and I've got all the relevant bits (hard hat, goggles, big hammer, ear-defenders for the missus) but can someone tell me before I start is the gearbox sprocket retaining nut left or right hand thread.
Cheers

Right hand thread.

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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

I changed the chain and sprox on mine last week. As my wife wasn't able to help, I was expecting an epic battle with the gearbox sprocket nut, involving a game of Twister with brake pedal, but it was a lot easier than I anticipated. Someone on a forum suggested putting the bike in gear and putting the front wheel against a wall (why did I never think of that before?) and with a 24" breaker bar it came off pretty easily. It's only torqued to 120NM, which is tight but not stupid tight.

One tip from past experience: use a drift or punch and make sure the retaining washer is absolutely 100% flat against the sprocket before you try to turn it. Even the slightest proudness of the washer will turn difficult into impossible.

And yes, it is a normal right-hand thread.

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Hi Black Dog, cheers for that info

Got myself one of these when I changed the chain and sprockets last time.
Also needed an impact driver socket to fit on the sprocket nut, a few pounds from Halfords.

I have an old car battery in the garage that will not start the car but gives enough power for this.

It's my new favourite power tool.
Used it to remove the flywheel on the Morini for cam belt changes and it laughs at the wheel nuts on the campervan.

Steve

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Dog Tired

Hi all, I finally got round to renewing the chain and sprockets on the R and blimey, was the gearbox-sprocket nut tight, even with the missus on the brake!! ended up at the local garage and got it loosened with an air-gun, and even that was a struggle.
Back home I found on the wheel hub three of the bolt threads ends badly chewed from when the chain jumped ergo three f'd nuts (serves me right for not checking through the crud before spinning them off with a drill!!) I can replace the nuts, but is there a way to re-dress the bolt thread ends, I can't find a thread file here in France.

Ha Ha Got meself a thread file, re-dressed the bolt ends fitted new nuts, opened up the chain kit (AFAM its been in the garage 2 months) and whats this? some hollow pin type joining-link so now I'm searching for a hollow pin type joining-link fitting tool ho hum

Isn't this the type where you are supposed to roll the pin over the plate of the link? if so, pin punch!

Hi Bald_Pig sorry about the delay in replying lost the internet for a while, I did look into that with the pin punch but was a bit wary of my precision with the hammer, as luck would have it the solution presented itself, when I was binning the packaging it rattled and Lo stuck up on the inside of the box out of sight was the spring-clip joining link I had ordered so all is well and I'm clocking up the k's.

Why don't you us a split link to join the chain.?