230 lb
Street
Intermediate/B Class
Standard Stiffness
Not Lowered
I filled the air holes with J-B weld, sanded them down flush and checked them out, all good. I bounced the forks with all except the top clamps tight to address binding. I initially filled them too high with 15w, to 120mm below the top, fully compressed with springs out, and set preload per the Sonic instructions. Oops on the level, they were terrible, like a rock. After realizing my mistake I took 30cc out, to be at 150mm, and they are better, but are still way too stiff. Impact compliance is terrible, a bone-shaking experience. I get only about 1.5" of travel out of them.
I checked the damper tubes and saw they were drilled out but didn't measure. Whoever the original owner was, he was pretty into the good mods and I don't think they were guesswork - but don't know and should have checked. There is adjustability in the emulators, maybe I should look into that (?)
I can dial back the preload, at max it's about 16mm which is Sonic's recommendation. I took them down 2 notches, maybe set at about 5mm now. and am only finding marginal improvements with that and the oil level correction.
Has anyone set these up with a similar spring rate and can advise me? Even less oil? Is the air space acting as spring pressure, the emulator set wrong, or did I get springs that are too stiff? I'm not confident about reducing preload as the instructions are clear to have 16mm so I'd like to have it at spec.
Thanks for any info and for reading my long post. Worst case I'll drill out the JB weld and go with air suspension and stock springs, but that would stink. I had high hopes.
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