Ohlins for Girlies

[Seavoyage]

Since Ohlins no longer sells a rear shock for the 885i or 955i, I decided to build one to the original Ohlins specs. You can take these specs to your suspension tech to build you a shock with similar valving characteristics:

The Ohlins model for the 885i was TR852 (or TR 8520) based on a 46mm diameter piston, monotube body with adjustable rebound, piggy back adjustable compression, and a hose mounted hydraulic preload adjuster: Ohlins model 46PRCS. Preload is not adjusted with the collar.

I went a step further and built a 46HRCS with both a remote compression adjuster and a remote hydraulic preload adjuster. Rebound is still adjusted at the base of the shaft. This rear shock model is similar to the Ohlins TR709 S46HR1C1S offered for the 1050.



The shock specifications are different for a Steamer, 955i, or 1050. The Ohlins catalog only lists a TR704 for the 1050 http://www.ohlinsusa.com/us/catalog/Rec ... 6-10_1.pdf (http://www.ohlinsusa.com/us/catalog/Reclist2010_07506-10_1.pdf) which is a S46HR1C1S with 350mm length and a 120 N/mm (12.23 kg/mm or 685 psi) rear spring rate

The 2001-2006 955i (T709EN) had a 1" longer eye-to-eye length, but same stroke and spring length as the 1999-2000 885i T709. Best way to tell them apart other than VIN is paint scheme, no eye lashes on T709, exhaust collecter box, and vertical mounted oil cooler on right side (885i) vs. across 955i.

So if you have a 955i just change the eye-to-eye length. Or for the in-seam challenged, build the shorter shock to lower the seat height. I recommend dropping the fork tubes through the triple clamps to 20mm+.

Build Specifications:

Total length (eye-to-eye): 370mm (14.5", the 955i is 15.5")
Stroke 69mm

Parts (Ohlins part numbers) used on a TR852:

Head 870-55
Body: 1010-34
Shaft: 5500-16
End-eye 1054-21 (Note the top shock mount is a Torx M12 X 64MM; and the bottom shock mount is a  Torx M10 X 111MM holding a sleeve.)
Resevoir tube: 302-01
Internal spacer 1069-02 (2x)
Gas piston: 305-01
Shaft Jet: 5665-18
Adjustment valve: 5655-04
Valve stop: 519-04
Piston: 1114-14
Adjustment shaft: 566-41
Internal stop: 5115-01

Valving Specifications:

Compression: 520-38 (5x), 540-36 (2x), 525-34, 525-32, 525-30, 525-26, 530-22, 530-20, 530-18

Rebound: 530-34 (4x), 525-32, 525-30, 525-28, 530-26, 530-22, 530-18, 519-07, 578-01 (5x), 539-01 (Note the 2 stage blow-off)

Compressionadjuster (Preload): 186-12, 185-12, 186-18, 186-16, 186-14, 186-12

Spring 1099-74 220mm or 8.7 inch spring (The 1028 psi spring rate was a suprise.  180 N/mm or 18.35 Kg/mm) Much stiffer than the OEM spring . 1050 uses a ~640 psi (11.35 Kg/mm) rear spring. Ohlins spring rate provided is based on a 155-170 lbs. rider with gear.

Preload 18mm
Bearing, cylinder head: 536-02, 1018-02 (2x)
Bearing, end-eye: 3097-02 (2x), 1049-02 (2x)
preload adjuster: 3681-01, 1042-06
Spring clip: 516-01
Bump ruber: 563-04
Bracket: 1164-02 (for preload adjuster)
Spring position: 3mm
Gas pressure: 12 bar

Initial Settings:
Compression 10 clicks
Rebound: 12 clicks

To balance out the rear suspension, and eliminate fork dive, I installed Ricor Intiminators, with 5W suspension fluid to 107mm air gap.



Oddly, Triumph uses fluid volumes and not the air gap measurments with spring removed and fork fully compressed. measurement using fluid volume and not air gap is extremely inaccurate!

The following air gaps are provided: 720cc cc (107mm air gap) for VIN 198875 and after (955i).  Prior VINs had 682cc (119mm air gap). The increase in fluid volume was to reduce the fork dive. Front fork spring rates were increased from .400 kg/mm  to .600 kg/mm on T709EN and 1050.  '06 955i use 655cc (146mm air gap).  Interesting note: Steamers used .460 kg/mm spring rates.

You can also install Speed Four preload adjustable fork caps on the 43mm KYB forks. Do not use the fork caps for the Scrambler (41mm KYB forks). From another post: http://tigertriple.com/forum/index.php/topic,8697&highlight=preload+adjustment
Fork Cap - Bike Bandit number 1379171 (5557536-001) Triumph number 2040071-T0301
Spring Guide - Bike Bandit number 1379181 (5557546-001)

[Chris Canning]

Actually interesting that you posted that,because Ohlins only made shocks for the 955 for 18 months,the moment you phone the importers there's much huffing an puffing even finding the original part numbers :roll: .

The most important part of the above post is the spring for anyone interested because a 180 for most average couple with some kit isn't good enough,and for me thats were the trouble started!!!,It took 3 phone calls over a period to even find out if they did a heavier spring(they do) and I've now got one,the problem being the stock valving can't handle it,hence why my shock is out.

[Timbox2]

Hang on though, the OP is saying from 2001-2006 its the same shock, cant be, the Ally wheel Tiger shock is longer than the spoke wheel and that came in in 2004.

ive got different data for the forks too, my Manual which I updated when I got more info has the 885 has having 119 gap, 955 up to 198875 as 107, then 198875 on (Ally Wheel) as 146. As far as my records show there were no suspension changes on the ally wheel models up to finish (06).

My 05 Model had Hyperpro springs and they recommended dropping the oil fill to 500cc (From 655) as, I assume the progressive springs had more coils and displaced more fluid so less air gap.

[Seavoyage]

Belay my last (I stand corrected)

Timbox2 is correct.

The later 955i had a longer shock (15.5" eye-to-eye?) but same stroke and spring length. The mechanism is direct-link. The shock length changed with a revised swingarm.

On the fork fluid volume and air gaps. I received the specs by VIN from the service dept at A&S Motorsports: http://www.aspowersports.com

[Seavoyage]

Belay my last (I stand corrected)

Timbox2 is correct.

The later 955i had a longer shock (15.5" eye-to-eye?) for the revised swingarm; but same stroke and spring length. The mechanism is direct-link. The rear wheel travel changed with the swingarm.

[Chris Canning]

My defunct Ohlins spring

[Sasquatch]

Why go through all that when you can buy a custom built to your specs Hyperpro?

[Chris Canning]

Why go through all that when you can buy a custom built to your specs Hyperpro?

A question in 2012 to a problem in 2002 ,I've had that shock 8+ years and it was secondhand when I bought it.