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What's the preferred secondary spring in a 600 with say a 46-42full progressive.
Generally have used 140-200, thinking of 140-220. Wondering if it will hurt topend mph.
After the spring swap it only turn 7900-8000rpm , i grind 1 gram off my modded 66’ and gain back my 8100-8200! I’m doin 170km/h gps now on 2-3 inch flufy snow!.
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