can somebody help with upgraded shock spring numbers

[bimota]

hi guys,
there are a few guys on facebook have asked about a uprated rear spring to help with 2 up riding and luggage etc
now this spring has come on ebay, can any body tell me what 14.5kg/mm is and what that means to a numpty like me

Yamaha Super Tenere XT1200z Uprated Performance Shock Spring | eBay

<p>Yamaha Super Tenere XT1200z </p><p>Upgraded Shock Spring designed by TW Suspension Tech and made bespoke to replace the original spring that is too soft for any serious touring and two up riding. The original spring is only 12.5 kg/mm</p><p>This linear rate 14.5 kg/mm spring will fit...

www.ebay.co.uk

cheers

rob

 

[ballisticexchris]

A 14.5 is just slightly stiffer than the stock 12.5. 14.5 is good for a 130lb rider (without gear) and street.

 

[bimota]

wow
not much improvement over the standard then chris for 2 plus luggage

rob

 

[WJBertrand]

It important to understand if the spring wanted is for an ES or standard? The bikes have different linkage geometries and use different spring rates.


Sent from my iPhone using Tapatalk Pro

 

[bimota]

no the guy that asked me has a gen1 2012 bike, he was looking for a better spring for it for 2 up and luggage,
i saw this on ebay with the description i thought ok this looks good, thats why i asked but as chris has confirmed not really

rob

 

[jrusell]

Waste of money, not near stiff enough.
Minumum 16.0N, 16.3kg/mm, 914lb spring to see a real benefit.
If you travel a lot with a passenger I would be looking for at least a 18.0N (1028lb/inch)

Also if fitting to a stock shock spring length is very important. Stock spring is too short and does not have enough installed preload when on the minimum setting. You want a spring that is at least 5mm, preferably 8-10mm longer than stock spring. This way at the minimum setting you can get a decent sag number solo and still have some adjustment left with the stock preload adjuster when loaded up or carrying as passenger. If I remember correctly stock spring is 210mm. Look for a 220mm length spring in the correct rate.

For reference I am 215lb and run a 17.0N solo.
Here is a link to a page with a spring rate conversion chart.

Ohlins Shock Spring Conversion Chart

FYI:

www.vfrdiscussion.com

 

[Walters S10]

Waste of money, not near stiff enough.
Minumum 16.0N, 16.3kg/mm, 914lb spring to see a real benefit.
If you travel a lot with a passenger I would be looking for at least a 18.0N (1028lb/inch)

Also if fitting to a stock shock spring length is very important. Stock spring is too short and does not have enough installed preload when on the minimum setting. You want a spring that is at least 5mm, preferably 8-10mm longer than stock spring. This way at the minimum setting you can get a decent sag number solo and still have some adjustment left with the stock preload adjuster when loaded up or carrying as passenger. If I remember correctly stock spring is 210mm. Look for a 220mm length spring in the correct rate.

For reference I am 215lb and run a 17.0N solo.
Here is a link to a page with a spring rate conversion chart.

Ohlins Shock Spring Conversion Chart

FYI:

www.vfrdiscussion.com

Solo rider 2014 es model 270 lb with gear on ride with cases. What pound spring and where do I get it. Lol. I apologize if I replied once already