I agree there are many variables that determine dyno numbers. But hes running basically the same set up as me and many others, but with more cubes/displacement. His numbers shouldn't be the same as my 107. When ppl spend 2500 bucks or so on performance upgrades, we should get the most out of them with a good dyno. Quite a bit was left on the table with his. That's all everyone here is pointing out. If he's happy with it, then that's fine too. I wouldn't be.

 

Without seeing a dyno chart it's hard to say what was left on the table. My 107 with a Zipper's Red Shift 468, with a Billet Cat and Heavy Breather showed 105 hp and 126 torque. Do I think bikes showing less peak torque have left something on the table? No, they just showed that number on the dyno that day. A before and after chart might show something more relevant, as some dynos are "Happy" and would show inflated numbers on both charts.

What makes me happy about my set up is that my max torque comes on at 2850 rpms and holds to over 110 ft. lbs. until 5000 rpm. I have good power where I ride most of the time. Max hp 105 at 5150 rpm is okay, but I rarely ride at that rpm. I've got instant power riding on the highways and will never see a drag strip.

If you're happy with your bikes performance, and have achieved a boost in power where you want it, that's what matters, not peak numbers!

 

Northside's thinking is sound. Peak numbers are good for bragging rights, but the torque curve is what matters to how the bike will feel when riding it. Also, you can't reliably compare peak numbers, there are too many variables in the Dyno process. Human nature dictates, we all want to say our engine makes the most power.