Hey,

Year ago I bought xt660r 2007, bike is superb there is no match for it in this so called "allroad" bracket... BUT there is a big BUT: I have mad engine vibration over 120 kmh+ and it goes up to say 135 kmh - by that time engine rpm is so high that it goes away.

I dumped the acerbis handguards in hope to get relief.
I Installed my old CBR600 barends (custom made - special heavy) that fixed problem for CBR but with XT, theres almost no use!

The vibration is so hard that its almost impossible to ride it at 120 kmh.

This vibration has been around since i bought it and all that time I have tryed to fix it - nothing seems to help.

If you guys experience same vibration and say its normal then I think I really have to sell the bike because its untolerable to ride.

HELP!

I have had 2 XTX's a 04 & a 07 model & both of them had a vibration that comes in around 117KPH to 125KPH while cruising.

It is from the motor & is not a fault but a feature of these bikes. When I changed my gearing from a 45 tooth rear sprocket to a 47 tooth the vibration moved to 110KPH mark from 117KPH.

Full your bars with river sand if it bothers you, this will help.

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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 /
[
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

Do a search for soft foam grips (not the ones called gel grips) Foam grips are used by many Dakar riders, and insulate your hands from any vibes. All day riding is then easily possible.

Everybike produces vibrations from the engine its just the XT being a big single makes alot more than most bikes. As youve said you have already tried heavier bar end weights why not try a heavier bar itself, fill the bars with sand, change the gearing, buy foam grips etc etc.

There are a few options to try but mostly they will dampen the vibration but not totally make it dissapear. I dont think anyone have found a solution to totally make the vibration go away yet.

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Plough on

I think it's time to resurrect old topic

I had a testride yesterday with another Xt660r 07 (Piipz's bike, user here also)

Hes XT does not VIBRATE!!!! Yes it does have some vibration like big singles do but you can cruise comforly at highway speeds.

I have checked everything that could cause vibration... engine mounts, every kind of nuts and bolts.

I'm clueless now...


Anyone has some other ideas or suggestions what to check? Warranty is over also so that wont help

I can't say i've noticed this 'vibration' you guys are talking about either.

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