pokeyjoe
High Miler
What's good for rear sag? I'm used to something in the low thirties for a sport bike, but this is certainly a different animal. 40mm? 35?
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I have springs and emulator kits available if/as needed.pokeyjoe said:Thanks for that - it helps. I'll measure my front sag and see if I can get the rear to match.
pokeyjoe said:Well, looks like I may need some help. The bike only drops 13mm when I sit on it. I'll have to get it up on a jack to check free sag.
Well, thanks for that, but no one in that thread actually measures anything. They talk about their settings, but that's it. And a Griso weighs about 150 lbs. more than a V7. I'll try to measure my free sag this afternoon.Bill Hagan said:
Roughly speaking, you should be at 1/3rd total travel... however travel is pretty limited on both ends, so take that with a grain.pokeyjoe said:OK. "Race" sag was/is 43mm in front and 25mm in the rear. Since the rear shocks are adjustable, I managed to get that to 30mm, however I can turn the springs on the shocks with my hands under just the weight of the bike. It's easy. Is that OK? And I need stiffer springs for the front.
GuzziMoto said:I have always heard, and it seems to work for me, that your race sag should be around 25% to 30% of total travel. 1/3 is slightly above that but close enough.
As for whether you need stiffer springs, that is another story. To determine if you need stiffer (or softer) springs you need to measure both your free sag and race sag as mentioned already. Then once you have set your race sag and re-measured your free sag (or in the case of your externally non-adjustable forks calculate/extrapolate what it would be if you added the preload required) the differences between the two will tell you if your springs are too stiff, too soft, or just right. If you have the correct amount of race sag but too little free sag then your springs are too soft. If you have the correct amount of race sag but too much free sag then your springs are too stiff.
You need to calculate both free sag and race sag.
You should never have zero free sag.
GuzziMoto said:The opposite is also true, if your spring(s) is/are too stiff then you will end up running very little preload, like the V7 in question, to obtain the desired amount of race sag. This minimal amount of preload, in addition to making the spring loose in the shock, will result in a high amount of free sag. More free sag then you should have when race sag is where it should be means your spring(s) is/are too stiff because you did not need to add enough preload to achieve the desired race sag. That resulted in too much free sag.
I got some springs from Todd and finally made new spacers last night. My new numbers:pokeyjoe said:Front
Free sag - 30mm
Race sag - 43mm