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XT660Z T�n�r� Tech Section Tyres, Mods, Luggage & Long distance preparation |
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Chain tension keeps changing?
Hi,
My 12k mile Bike is suffering from a phenomenon where the tension goes from slightly too loose to too tight. I've checked chain tension around the length of the chain and whilst there is a slight tight spot it's not significant. It seems to be after the bike has stood for a length of time on the centre stand, push it off and the chain is very tight. Wheel it round for a bit and it's fine. Axle nut is torqed up. I have MM lowering links, though not sure if that would have an effect, though the back end is very soft. ?shock problem Any ideas greatfully received. Thanks |
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have you made sure the rear shock linkage is free moving?
i was going to say you had a tight spot in the chain but as you say it when it comes off the stand then it could be that it's sitting too high when you first take it off the stand? just a guess really, as i can't think what else it could be.
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check out www.redbikejohn.com for all the latest race reports from the CHEC and enduroland. |
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Time for a new chain & sprockets.
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Click here to join the XT Supporter's scheme 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 / [ 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 |
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Linkage is moving and I greased them a few months ago when I fitted the lowering links.
As Kev says, new chain and sprockets are probably needed so I'll start there first Thanks |
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Lol i have the MM lowering links and my tension is very inconsistant too, how weird
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...On a steel horse i ride. |
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The more I look at it the more convinced I am that it is to do with the new lowering links. I say this because both the chain and sprockets look in reasonable nick with no appreciable tight spots, the chain sits on the sprocket fairly tightly with only a small about of movement when you lift it.
Maybe after being on the centre stand for a while the shorter links cause the linkage to stick and only free up when the bikes moved around for a bit? I did have a session in the garage today but of course it's not playing ball now and I couldn't get the chain to tension up!! |
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