Suspension travel numbers

[LA Mike]

Anybody have the total suspension travel numbers for the 1989 FJ? Trying to setup my Wilbers rear shock.


Thanks,
Mike

[jvb_ca]

Mike...this is copied from the Yamaha Service Manual

HTH's

_____________________________________________________________________________________
Model                               FJ1200w/WC
_____________________________________________________________________________________
Front Suspension:
Front Fork Travel                  150mm(5.91in)
Fork Spring Free Length         485mm (19.1in)
<Limit>                               480mm(18.9in.)
Spring Rate           K1           4.71 N/mm (0.48 kg/mm, 26.9 lb/in)
                          K2           6.86 N/mm (0.70 kg/mm, 39.2 lb/in)
Stroke                 K1           0-100mm (0-3.74in)
                          K2           100-150mm (3.74 5.91in)

Optional Spring                      No
Oil Capacity                          395cm2 (13.9 Imp oz. 13.4 US oz)
                                          169mm (6.65in)
Oil Grade                              Yamaha fork oil 10wt equivalent

__________________________________________________________________________________________
Rear Suspension

Shock Absorber Travel              40mm(1.57in)
Spring Free Length                  163.5 mm(6.44in)
<Limit>                                  159mm (6.26 in)
Fitting Length                         151.5mm (5.96 in)
Spring Rate                            196 N/mm (20kg/mm 1,120lb/in)
Stroke                                   0-40mm (0-1.57in)
Optional Spring                        No



Cheers...Jake

[the fan]

Mike,
150mm front, 119mm rear (with stock shock, 40mm shaft travel)

if your Wilburs has more or less than 40mm multiply the shaft travel by 3 (2.975 to be exact) to find rear travel.
You may also want to check the overall fork travel. If I remember correctly you have the F3 fork mod which gives you only 130mm travel as opposed to the FJ's 150.

here is a previous post on the subject.

1. Fork Ride and free sag; To find a good baseline setting I look for sag numbers of 1/3 of overall travel for basic street riding and 1/4 overall travel for aggressive sport riding. On the FJ this works out to 50mm for general street riding or 37mm for more aggressive riding.  (based on assumption that my service manual is correct listing 150mm overall travel) . While this is fairly easy to achieve by adding preload with adjusters and spacers, you still want to make sure that you have somewhere between 10-15% (15-22mm) of overall travel in free sag. If you are unable to reach both the ride and free sag numbers you need new springs.

2. Shock ride and free sag; You want to use the same sag percentages at the shock as you do the forks. On the FJ this works out to 40mm for general street riding  and 30mm for the more aggressive.  Again you want to check the Free sag to ensure that it is in the acceptable range (12-18mm). (based on assumption that my service manual is correct listing 119mm overall travel)

http://www.fjowners.com/index.php?topic=349.0