Join Date: Feb 2012
Location: Valencia, CA, USA
999S Swingarm Length and Ride Height
Hi All -
In conjunction with refurbishing my track only 999S that was on stands for 6 years, I fitted new new race rubber (SC1s ver 2 - 200/55 rear). To make this happen, I needed to pull the rear axle back and install a 520 chain (100 links) with 15/40 gearing. This resulted in a swingarm length of about 502 mm. I also dropped the front forks with 3 lines showing. Please note that the forks and shock were sent out for service so springs, valving (just the shock) and oil were on target and I had "good" sag at both ends - I'm 6'2" and 220 lbs so the springs had to be changed. The ride height adjuster was set (and was always set) at 285 mm.
I did not increase the rear ride height as the rear SC1 was "taller" than the previous rear tire.
Recent track day results: bike that wouldn't turn or hold a line, rear tire shredded, front tire barely showed wear. I attempted to "dial out" the bad geometry (drop forks one more line, reduce front preload, increase rear preload) to no avail.
Did the lengthening of the swingarm reduce my rear ride height?
With a 502 mm swingarm length, how much should the ride height adjuster be lengthened 285 mm plus X mm?
I want to try and make the 200 rear work.