Hi all,
I broke the rear shock on the week away trip recently, I have not seen the problem before and wondering if anyone else has seen the same problem,
The shock is fitted with a Hyperpro rear spring.
I will see if I can get a new shock under warranty as the bike has only 12000km in 6 months, however what worries me is that the lugs may break off again so I may have to MIG weld them on the sides as they only look riveted on.
http://ozrob.smugmug.com/Motorcycles...51-50110-M.jpg

http://ozrob.smugmug.com/Motorcycles...52-04929-M.jpg

I wouldn't try welding them unless you strip the shock down...

Heat the oil......

Any presure in the shock will/could cause a blow out once
the metal turns molten "melts , softens under heat"....

Blistering on the inside that will/could stop the piston traveling
or sealing on the inside wall.. need honeing after welding......

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Never seen that on a XT before, I would not tell Yamaha you were using a Hyperpro spring if you are going the warranty route.

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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 /
[
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've always thought it an odd design. Well cheap I guess. Surely a threaded barrel & collar would be cheap enough to design/fit.

Would (or should) spring rate/brand really make a difference? I assume OzRob that your bike has taken one too many heavy landings??

Hi, if it was me i would throw the original spring back in, that is, did you or your dealer fit it?. if fitted outside of the yamaha dealership, break out the spanners!

I really can't see why warranty would not cover it. the lugs are spot welded on, it's common practice and should be sufficient, yep welding potentially could be dangerous

stoic

I have put the original spring back in so it is back to standard before I take it back to the dealer tomorrow.
There is a motorcycle suspension shop down the road from the yamaha dealer, I might pop in and see if I can get some advise about welding the lugs, however they might try and sell me a Wilbers shock at twice the price I can get one for from OTR.
Thinking about it more I could make a collar that has the lugs welded onto it, and spot weld the collar onto the body of the shock, as all the weld needs to do is stop the collar from rotating.

Update:
Yamaha supplied a new shock...they had one in stock...the dealer was thinking perhaps they have a known problem with the adjustment cams breaking off....anyway I decided to spot weld the lugs with the MIG welder and put the Hyperpro spring back in, so I will see how it goes.