2003 EC300 Ohlins FG 013 forks, options to INCREASE sag?

[brider]

Finally got around to measuring the rider-sag on my '03 EC300, Ohlins manual says 80+/- 5 mm, mine is like 53mm, so my first question is, is there a way to REDUCE the preload (shorter upper spring mount?) to gain back ~25mm?

Since I am not sure mine is a 2002 or 2003, I did some searching on this subject and found I think a link to a FG 012 fork manual for a 2002, and it lists right around 55 mm for sag.

My original concern is the forks felt harsh over small chop....

So, if mine are FG 013, my current 53mm is too short, which might explain the hashness. Manual shows image of a spring mount swap (but no P/N) or alternate spring P/Ns. If they are FG 012, they're right on the money, which means maybe too much compression damping...(?).

Thoughts? And no, right now I am not going to do a KYB swap, but if KYB parts (spring mounts, springs, etc) will work I'll try that.

 

[Anders]

So, if mine are FG 013, my current 53mm is too short, which might explain the hashness. Manual shows image of a spring mount swap (but no P/N) or alternate spring P/Ns. If they are FG 012, they're right on the money, which means maybe too much compression damping...(?).

Thoughts? And no, right now I am not going to do a KYB swap, but if KYB parts (spring mounts, springs, etc) will work I'll try that.

1. Is there a way to figure out what model fork you have?
2. My first thought would be to fit shorter springs. Go through e.g. RaceThech lists, perhaps something could fit. Measure the springs you have and see if you can find some shorter ones with the same spring rate. A too short spring is no problem, just turn a spacer in a nearby lathe

 

[brider]

Thanks, but I'd sure like to know what the current spring rate IS......I suppose that's easy enough to measure once I get it out.

Thanks again, it helps just to talk problems thru.

 

[webmaster]

You can measure the dimensions of the spring to calculate the spring rate. Diameter, length, number of coils etc

You probably need a softer spring...

You can use the spring rate recommendation app on race techs website. If you don't see a gasgas or rieju in their selection, pick an older kx250 2 stroke.

Jeff