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Mt-09 Rear Shock On Tdm900


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#1 fixitsan

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Posted 11 September 2021 - 11:35 am

In an attempt to get a Yorkshire bargain, I noticed that MT-09 rear shocks appeared to have the correct dimensions to fit the 900, and that Ohlins MT09 shocks were cheaper than the same Ohlins shock for the TDM900.

 

The market for the MT-09 rear shocks is more lively than for TDM's because the standard shock has been said to be quite poor, so lot's of shock changes are being done and competition in the aftermarket is therefore more intense, which is why I think they're priced lower than for the TDM900

 

Anyway, the top mount is a 30mm x 10mm, and the bottom is 30mm x 12mm, the TDM spring length is 185mm and Ohlins can be found at 190mm (spring codes starting 01096 are 190 mm long, and for a 180mm spring length the code begins with 01095)

 

Spring strengths end in -49 for 130N/mm (standard TDM rate), -54 for 140N/mm and -59 for 150N/mm

 

I found the strength of the standard 900 spring by scouring a lot of websites, which usually gives a variety of results due to typos and bad editing, but I settled for 130N/mm.

 

The MT-09 rear spring is 90N/mm so a straight swap to a TDM900 from an MT-09 would probably only work for an extremely lightweight rider The MT-09 has a longer travel rear suspension, hence the lighter spring required, which is due to the lever ratios in the bottom shock linkage being different to the TDM.

 

I've always felt the TDM spring was too light for me at 130N/mm, and considered the replacement Ohlins spring rates of 140N/mm and 150N/mm, settling on 140N/mm. Every 50mm of shock travel therefore requires another 50kg of weight, and as I'm 112kg fully loaded and the standard spring seems to be selected for an average rider weight of about 75kg I'm still in the same ballpark, but more but towards the firmer side.

 

The spring for the Ohlins I settled on was the 57mm ID,  190mm long, 140N/mm, which has a part number 01096 -54 ( the part number for the 150N/mm is 01096 -59)

 

The Ohlins replacement for an MT-09 is part number YA335, which I found for £414 from an Italian supplier, who agreed to replace the spring free of charge. But muggings here forgot that sometimes duty charges are applied and that was another £95 to UPS, making this a more expensive option then going to a UK supplier !!!. 

 

There's probably cheaper ways to check other shocks, like buy one from a scrapyard, but hey-ho :)

 

 

 

The length of the Ohlins shock, measured eye to eye,  is actually about 5mm longer than the standard  TDM, but has no effect at all because the spring is adjustable for preload (ride height).

 

I haven't gone through a full setting up yet, but the way the Ohlins arrived gave me 10mm static sag. I set the rebound to a slightly firmer than middle setting and just went for a quick test.

 

It's a great difference. Very settled through bends and extremely well controlled over rolling crests, especially when there's multiples of them in quick succession, which is a vast improvement over the standard TDM shock.

 

Anyway, I thought it might be of interest for future reference, to keep in mind that an MT-09 shock (years 2014-2019) seems to be a possible direct replacement for the TDM900 (if there's no additional awkwardly mounted reservoir on the shock body), except for the required spring change.

 

If you don't need to increase the spring rate then the existing TDM spring can probably work on the MT-09 shock body

 

I've seen some secondhand performance shocks for MT-09's with low mileages sell for very reasonable prices, the standard MT-09 shocks seem to be considered to be pretty worthless, judging by the prices they sell for, but either way if you needed a replacement shock in an emergency it might be beneficial to remember it as an option, as long as you also replace the spring (which might make it more expensive, not less !)

 

 

The YA335 is also listed as being suitable for the following bikes, which seems to make them suitable donors

 

  • MT-09 (’14-’19)
  • MT-09 SP (’18)
  • MT-09 Sport Tracker ('14)
  • MT-09 Street Rally ('14-'15)
  • XSR 900 (’16-’19)

 

 

 

 

51446274070_02a77e480f_k.jpg20210911_101822 by Chris Barron, on Flickr


Edited by fixitsan, 12 September 2021 - 10:33 am.

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#2 fixitsan

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Posted 11 September 2021 - 11:43 am

I've just popped onto ebay and seen this

https://www.ebay.co....UQAAOSw4dhhNgIu

 

If only' I'ld waited a bit longer, !  but £499 for a fully adjustable Ohlins (plus £75 for a replacement spring) seems pretty good value if the shock is working well

 

EDIT  - you could obviously also fit the existing 900 spring (130N/mm)  to this particular shock and just get on with it for £499 !


Edited by fixitsan, 11 September 2021 - 11:25 pm.

900 with better bits. Owes me nothing, Makes me smile


#3 fixitsan

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Posted 12 September 2021 - 10:44 am

The longer travel MT-09 suspension is also faster moving on the MT-09, for the same amount of suspension travel as the TDM, this is possibly a reason why the standard MT-09 shock struggles, and in a slower , shorter travel suspension system like the TDM it isn't worked as hard. You can get very low mileage (changed because it didn't work well on the MT-09) MT-09 rear shocks for £50 with 5000 miles use. If i was made of money I would try one now just to see if the idea works, I think with a TDM spring the MT-09 shock could be a suitable cheap replacement to a standard worn TDM shock


Edited by fixitsan, 12 September 2021 - 12:06 pm.

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#4 Catteeclan

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Posted 12 September 2021 - 01:28 pm

:good: Good work as always.  :drinks:


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#5 fixitsan

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Posted 12 September 2021 - 02:27 pm

:good: Good work as always.  :drinks:

  :good: It would have been financially beneficial if it hadn't been for  those import duties !


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#6 wicklamulla

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Posted 12 September 2021 - 07:52 pm

I've just popped onto ebay and seen this

https://www.ebay.co....UQAAOSw4dhhNgIu

 

If only' I'ld waited a bit longer, !  but £499 for a fully adjustable Ohlins (plus £75 for a replacement spring) seems pretty good value if the shock is working well

 

EDIT  - you could obviously also fit the existing 900 spring (130N/mm)  to this particular shock and just get on with it for £499 !

 

 

 

LOL wait till Dapleb see's who the Ebay seller is!


excellent research there Fixitsan  :good:


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#7 fixitsan

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Posted 12 September 2021 - 09:07 pm

 

 

 

LOL wait till Dapleb see's who the Ebay seller is!


 

 

Spill the beans !


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#8 Favs

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Posted Today, 02:45 pm

What's on


Single-handedly reviving the Wave.

 

2008 reg. Black TDM 900 ABS

 

 

 



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