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Message: [QUOTE="Rich Rohrich, post: 1308395, member: 16241"] Doug - The stock pipe with the stock cam is really pretty damn good. Even Akrapovic can only get about 0.5 horsepower out of a full race pipe, so spending $800 for the good stuff doesn't make a whole lot of sense. There seems to be more to be had with a cam. I would try a Stage 1 Hot Cam or a Stage 2 if he rides longer tracks and lives really high in the rpm range along with AP mods and sharp jetting. They are cheap and easy to pop in and test. Those wing things are a waste of time and money. It's possible that some of the aftermarket pipes MAY work better with a different cam combination than they do with the OEM setup, but without a lot of testing it's tough to say. Chances are good he'll never get value for his money with a pipe on this bike. The ugly reality is, he needs to to top ends more often and the kid should have a practice bike. At 140 hours that crank is getting ready to hatchet the cases open. Reality check time. These engines start losing ring seal in the 5-8 hour range. Valve springs last about as long as a piston (or less) and when they wear they don't control the valves as well and the power starts to fall. For the average guy it's not a huge deal, but if you are looking for power for fast guys maintenance is the best value for the money. Cams and pipes don't do **** if the ring seal sucks and the valves are bouncing on the seats or floating before the redline. If it were MY fast rider, I'd build a good cylinder head with Kibblewhite or Xcelydyne Ti valves, good valve seats and valve guides (like Kibblewhite's Ampco 45 pieces) and Kibblewhite race springs. I'd change rings at 10-15 hours, and pistons with every other ring change. That would keep it sealing fairly consistently. Once that was covered I would do the AP mods to try and get the throttle response the rider wants (for some guys it doesn't matter) and then I'd try some cams but NOT tell the rider which one was Stage 1 and Stage 2. I'd change it let him ride it and see if he liked it. The way the power is delivered has such a huge impact on a rider's confidence that assuming one cam is better than another based on the specs makes no sense. Good suspension and fresh tires tailored to the terrain will probably make more difference than anything. ;) [/QUOTE]

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