slingy suspension linkages, shock springs etc

[badger]

howdy ho!
I've hurt my brain, searched a plenty and still stuck. 
Bought an ohlins shock from a zzr1100, guy had it fitted to a slingy 1100. Turned out the shock was pretty fucked so paid out for an extensive service and turns out its still way to soft. 
I have discovered that suspension stuff frazzles my noodle. The spring I have is 01091 -23/90. on a chart it doesn't seem to exist. 
Question being, do I use another suspension linkage or do I need a new, heavier spring? How would I work out what size linkage etc? 
Amy help would be mucho appreciated. Thanks!

[badger]

29/90! turns out to be a perfectly placed scratch!!
Also, can I fit a 10mm shorter spring or does it have to be the same length?

[suzook12]

You can fit a shorter spring, ohlins generally have loads of adjustment, demon tweeks used to do springs for £40 if you know what spring rate you want......Although you may be better off talking to a suspension tech. I would look at mine for you but as it has an 11" over swinger in it, won't be much help

[badger]

Mines 6 inch over. I'm gonna take a punt at 100 lbs spring I think. Will have a look at demon tweeks. There's a load on Eblag but 10mm shorter. £17 posted though!

Thanks for the reply dude 

 

[suzook12]

100 or 1000lb spring? my drag bike has a 1300lb spring from memory. That I can check, as I had 2, one of which was removed to put standard on when i sold the ohlins....

[suzook12]

Just a thought..... Racetech have a spring calculator on their website, crunch the numbers and see what it comes up with

Steve

Edited May 14, 2017 by suzook12

[Sandman]

An ohlins spring with no. -29 has spring stiffness equal to 90 N/mm (9.18 kg/mm=514 lbs/inch) and is ok for rider Weight (without gear) of 85-90 kg.

[badger]

100n/mm spring not 100lbs! My bad. On the chart it says it right. Did look at the racetech sight before.  It is an extended arm but it wasn't this bad on stock shock.

I'm 80kgs and the bikes about 190.

My next trick if figuring out how to take a spring off without killing my self!  

[suzook12]

As ypu have an overlength arm, work out the legth as a percentage then increase the spring rate by the same percentage.......

 

Removing springs from an ohlins is a doddle, just keep unscewing the collar, you can remove the pre-load totally.... You will run out of spring before you run out of shock....

[badger]

7 hours ago, suzook12 said:

As ypu have an overlength arm, work out the legth as a percentage then increase the spring rate by the same percentage.......

 

Removing springs from an ohlins is a doddle, just keep unscewing the collar, you can remove the pre-load totally.... You will run out of spring before you run out of shock....

If i'd used my brain I'd done that. I think im gonna shorten the wheel base a bit. Enough to keep the bike nicer in corners really but not to wheelie crazy. 
Do you have a remote preload adjuster? I can't find anything about how to rotate it. There's a pin to stop it moving. I dunno if I wind it to max, crack the thread on the 2nd collar and twist the whole thing? 

[markfoggy]

You need a Shock compressor with a Hydraulic adjuster. Top ring has a notch in it for the pin, you set the top ring where you want it, usually for 8/10mm compression of the free length of the spring, drop the Hydraulic on and reassemble with the spring.

[suzook12]

Can't help ya with the remote preload, never had one, not even seen one in the flesh, looks like spring length may haveto be right after all......

 

[badger]

Cheers guys. There's no local bike places that do shock springs so might try my luck with a car place. No idea if they'll be able too. Dunno if I wanna risk a generic car spring compressor. Don't wan't to spend a mint on a posh one as im only gonna use it once 

[markfoggy]

Don't do this. ^

Phone me, PM incoming.