| Author | Message | ||
     Dcmortalcoil |
Anyone know what the OEM spring rates are? RaceTech has listed 08-09 1125 as having the following spring rates: Fork: 0.99 Kg/mm Shock: 9.0 Kg/mm (514 lb/in) I recall someone mentioning that these numbers are incorrect. The shock spring part number (K0424.1AMA) is the same for 2008-2010 bikes, which leaves me to believe that the shock spring rate hasn't changed. The fork spring part numbers, however, are different between 2008 and 2010 (J8113.1AMA vs J8113.1AMB) models. Installed Showa racing shock from Erik Buell Racing, with 9.6 Kg/mm (550 lb/in) spring and it is way too stiff. It's all static sag with with very little dynamic sag (around 5mm) with the spring at the lightest setting. I'm thinking of replacing the shock spring with the OEM. BTW, I only weight 130lbs. I also need to replace the stock fork spring and trying to find what spring rate will work for my weight. I'm getting bounced around riding in the city pavement. | ||
| Dcmortalcoil |
oooo | ||
| Jdugger |
Wow, you are a light one  How fast are you? I think I have .95 in the forks, but I'm 180+ in gear. It's firm, but I'm decent on the brakes and have recently added a click of compression damping to just quite not bottom the forks in the hardest braking zones. If you want 'er plush, you might even need .85 in the front... but no one else will ever be able to ride your bike and when it comes time to sell if a "regular guy" sits on it, he will crush the suspension instantly! Where are you located? You should find a local suspension tuner and they can get you set up right. It's surprisingly inexpensive to have a custom spring wound for you in the grand scheme of things. | ||
| Blk09r |
I think you'll find the info you are looking for here.... http://old.racetech.com/evalving/english/Srchpr.as p?bikeid=57&manufacture=Buell&model=1125+R&year=08 -09&TABLEINFO=street&langname=english Click on the spring rate calculator to see what spring rates you need for your weight. | ||
| Dcmortalcoil |
Blk09r, Thanks. I've been to RaceTech sight and used the calculator. The problem is that I don't quite trust the spring rate values they provide. That's the reason for my post here. 514 in/lb for stock 1125 shock seems very low, given that RT states that a stock shock spring rate for XB9 is 603 in/lbs. I've ridden XBS/R, SS, and they all have a much more compliant shock than 1125. Perhaps the bike geometry has something to do with the shock spring rate being low for 1125. But having the shock laid more horizontally, like 1125 should have increasing spring rate in comparison with a shock positioned more vertically based on simple geometry? Yes? No? Someone here must know the OEM spring rates. | ||
| Dcmortalcoil |
no one knows??? |
