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my ohlins
Look up on the top of the shock for a model number, for instance per Ohlins you need a YA343 and it should have a spring code of 01093-31 (If it hasn't been altered). Looking through my Ohlins stuff here at the shop and I don't see that spring and Ohlins is closed till Next week. If you don't find the answer before the latter part of next week. Get back ahold of me and I will call Ohlins and see what's up.
 

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my ohlins rear shock is YA 343 and the number on it is YA 343 OP1....
i think that was some race spring on it (with numbers R-2217-875)...
i was looking on the net and i found some (not much) information about that spring (2217-code for length= 150 mm, 875- mark strength springs in N/mm= 87.5 N/mm) but Im not sure that information is correct ...I think I will not find any other information, so your help is welcome..thnx
 

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You're faster than I can write the answer..:thumbup
Thanx for info...if you have some more info about that tips of race springs, pls share with me (I am interested in comparison with standard Öhlins springs...hardness, strength, possibility of loading, differences mainly)
 

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Sure that isn't 8.75 NM? 87.5 seems a little high to me.
No sir, 87.5 nm / 8.9 kg or 500 lbs. Gotta love all the different rates!?!?! How have you been Dan? Hope all is well, everything is good here...just busy. Had a little boy the first of Oct. You guys coming back to Jennings anytime soon?
 

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You're faster than I can write the answer..:thumbup
Thanx for info...if you have some more info about that tips of race springs, pls share with me (I am interested in comparison with standard Öhlins springs...hardness, strength, possibility of loading, differences mainly)
Let me make a call next week and see if I can get a true answer from Ohlins, but basically it is a tighter tolerance spring. If you ever have researched springs and rates, the big issue is inconsistency with the actual rate itself. That is even one of Race Techs statements. Hand wound springs are very accurate through the stoke of the spring were mass produced machine wound are all over the place. Aftermarket springs are usually held to a higher tolerance, and then you get into "Race" springs and they are an even tighter tolerance. And of coarse they cost more money, so I have a saying "Speed costs money, how fast do you wanna go!" Anyway hope that helps some and I will get a better answer after the new year
 

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No sir, 87.5 nm / 8.9 kg or 500 lbs. Gotta love all the different rates!?!?! How have you been Dan? Hope all is well, everything is good here...just busy. Had a little boy the first of Oct. You guys coming back to Jennings anytime soon?
Congrats on the baby, Steve! Great to hear.

We are doing the memorial at at CMP this year, during April. Going to try to move it a little north for all the people we have traveling long distances.

Them NM things always throw me for a loop. Always looks like the decimal is in the wrong place, but it's 1 kg = 9.08 N. I need to put a conversion chart in my tool box :lol Good info on the tolerance of springs. I was discussing just that with Dave a few weeks ago.
 

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I just recently purchased an Ohlins rear shock (TTX36) for my 08 R1. And like most people when receiving something new, and spending your hard earned cash. My concern was, does the shock have the correct spring rate for my weight. Even though, I gave the company my riding weight w/wo gear. Most companies require it when ordering an aftermarket shock or spring.

So I'm passing on some information I recently learned in regards to spring rates based on riding weights. This is not a suspension setup thread. Just information to know when ordering or at least understand what the numbers stamped the spring mean. A setup suspension thread has already been done by DanQ, so if you are looking for suspension setup 101, here is the link for that : http://www.r1-forum.com/forums/showthread.php?t=252234


This information was gathered from some folks on this site like motogp, hardracing, and ohlins.

Below, are a couple of charts that are model specific. if you look carefully you'll see that the spring rates for different models don't differ. At least for models YA638/788 according to the Ohlins spring rate chart. There is a margin of 25 pounds between each spring for each weight given. Follow the mini charts below and you'll be able to use the larger chart to determine what spring rate is recommended for your weight.

Determining what these numbers mean on ohlins shock (21040-31/95 L496)
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When looking at your spring you'll notice a set of numbers, example (21040-31/95 L496). The first few number determine the length on the shock (21040) normally 160mm is standard, and the next few number relate to weight ratio for riders(-31/95). Ohlins uses its own numbers. which is where things can get confusing figuring it out. Only concern yourself with the second number /95 in this case. The last set of numbers (L496) relates to the lot number. Below, the chart has it broken down into weight, and total recommended weight capacity for your bike and rider.

P.N. ____ Spring # ______ Rider Weight
YA 638 21040-31/95 ..... 150 - 175
YA 638 21040-34/100 ... 175 - 200
YA 638 21040-36/105 ... 200 - 225
YA 638 21040-39/110 ... 225 - 250

YA 788 21040-31/95 ..... 150 - 175
YA 788 21040-34/100 ... 175 - 200
YA 788 21040-36/105 ... 200 - 225
YA 788 21040-39/110 ... 225 - 250
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If you bought your shock New or used. Hopefully you'll now be informed with good information to understand what's right for your weight, when looking at an Ohlins shock.

Art. nr. Rate
N/mm Kg/mm ibs/inch

-88 28 2.85 160
30 3.06 171
-90 32 3.26 183
-01 34 3.46 194
-02 36 3.67 206
-03 38 3.87 217
-04 40 4.08 228
-05 42 4.28 240
-06 44 4.48 251
-07 46 4.69 263
-08 48 4.89 274
-09 50 5.10 286
-10 52 5.30 297
-11 54 5.50 308
-12 56 5.71 320
-13 58 5.91 331
-14 60 6.11 343
-15 62 6.32 354
-16 64 6.52 365
-17 66 6.73 377
-18 68 6.93 388
-19 70 7.13 400
-21 75 7.64 428
-24 80 8.15 457
-26 85 8.66 485
-29 90 9.17 514
-31 95 9.68 542
-34 100 10.19 571
-36 105 10.70 600
-39 110 11.21 628
-41 115 11.72 657
-44 120 12.23 685
-49 130 13.25 742
-54 140 14.27 799
-59 150 15.29 857
-64 160 16.30 914
-69 170 17.32 971
-74 180 18.34 1028
-79 190 19.36 1085
-84 200 20.38 1142
-89 210 21.40 1199
Is this chart showing rider weight with gear or without gear?






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Okay i just gotta ask, how come that this spring rates and the ones that racetech calculator are so diffrent? I own a r1 2008 and gott the YA-932 damper and weight at 225lbs. Accordingly to this list i should be using an 1.05nm spring? But at the racetech calculator i should be using an 9.5nm? Would love to get it explaind to me :)
 
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