So after my initial build I had my bike dyno'd. Made 111/110, but after a few weeks riding I noticed at higher rpm's there was some ping'ing, so I went back to the shop to explain what was going on. To make a long story short instead of putting my bike back on the dyno he just hooked my tuner up and took some timing out. I will say it did work, but I felt it should have been put back on the dyno to get it dialed in right, I mean that is what I paid for.

Anyway, moved out here to Hi and I had some cash extra cash burning a whole in my pocket so I figured I'd get my bike dyno'd again. I get a call saying "she's done!" I head down and start looking at the printout. First pull 99/102, with a final tune making 105/106? So for some reason I dropped a few horses? So then I get home and start looking at my mileage. After taking off the distance I drove home it looks like only 10 miles was put on my bike during the dyno? The first time it was dyno'd I want to say 30+ miles was put on? Not to mention if you look at the printout it looks almost identical to the original tune? I'm getting pissed the more I think about it. I have zero clue on how to read this printout. Any feedback would be appreciated...

Tune from yesterday.


Original tune.

 

One performance input I got is if you want to get rid of that torque dip from 2300 to 3400 rpm and get much better performance in that important area - get better pipes.

Would not worry too much about the 4-5 percent difference between the tunes, that does not seem too crazy. 10 miles on the dyno seems very low though. Ask that last dyno guy to give you a SAE printout with rpm on the horizontal axis - easier to compare then. Kinda think the first guy got it pretty close, and the second guy had very little to do.

 

Yea I know I need a better 2-1 pipe, I just can't afford it right now. Don't get me wrong, I'm happy with the results, considering it's still a 103. Thanks for the advice. I'll roll over and see if they can give me that printout as well...

 

So, do you think the second tune the guy just adjusted the original or did he start from scratch?

 

The closer the starting tune is, the easier to perfect, yes I think he just tweaked your old tune.

Not trying to irritate you on the pipes, I have the same issue in my dyno chart - planning on Fat Cats this winter.....

 

That sucks because I paid as if I was getting a full tune. I wish I had a dyno! I hate having anyone touch my bike...