I just recently had my valve's checked at 20,000k, all within speck. But the big difference I noticed to performance was they balanced the carbs while they had it. Could hardly beleive the difference in smoothness and what appears to be a slight improvement in fuel use.
05 Speedmaster,Reverse Cone Shortys,Thunderbike AIR Kit,K&N Air Filter,Snorkel Removed,Dynojet Stage 1 Kit(126 main),Needle-Clip 1 From Bottom,42 Pilot,NGK Iridium Plugs,Progressive Springs,Hagon 2810's,Barnett Green Springs,TTP Safe-Start,MOSFET R/R
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