Wow! that was fun, interesting, informative, and suspicion confirming!

First off, the dyno they bought uses SAE correction factors to produce accurate True Rear Wheel Horsepower. Matt was a nice guy, I met the owner, Bamm, and had a great time.

Here's my setup:

I had explained that after adding the Thunder Kit, I could really notice the additional torque, where I did not have to downshift to keep from lugging the engine, that it would just pump right out of low speeds and rpm's in higher gears.

By the way, he did redline it and the rev limiter kicks in between 6200 and 6300 rpm.

The results, on my bike, with my setup, may surprise you. Here's a scan of the printout: http://sa750.com/other/dyno_sm.jpg

The numbers are explained by these two factors:

When I added the Thunder Kit, I did not move the clips on my needles. I figured I'd leave them on the 2nd notch and see how it goes. I had been feeling that I was losing something, and was planning to lower the clips to the 3rd notch, at least. I knew the Dynojet Stage 3 jetting instructions said 4th notch, but I figured I could always do that. What the dyno showed, and Matt confirmed, was a large drop in hp after about 4300 rpm. It's way lean at the top end, that due to the clip position. That did confirm my belief that I needed to drop the clips. So guess where I'm going to spend a few hours of my afternoon now? In the garage ripping GOT's guts out to drop the clips!

He also told me that the torque numbers are due, in large part, to the Vance & Hines pipes. He said they V&H pipes really pump up the torque.

So, for those that haven't clicked the link, the final was 40.76 bhp at 5290 rpm, and 48.68 ft/lbs of torque at 3570 rpm. I believe the printout grabs max hp from the spot where hp and torque cross each other, so that number is at the top of the report, even though at other points the hp was higher, and the torque as well.

Matt says when I drop the clips, the hp will raise up to the 43 to 45 area we had been expecting. The torque will probably go up as well, but only about 1 pound or so.

I'll be taking the bike back on Tuesday for another run to check the result of dropping the clips, and I'll report back.

Now, all you SoCal'rs, get your butts down to Bamm Motorsports! We need Digger's run, and Sake's run with the Kickers, and all you other guys, so we can put together a database. Bamm is having a Dyno Party and a Dyno Shootout on April 14th, with free food and entertainment. Vendors will be there, and there will be prizes and raffles and all kinds of fun stuff.

Bamm Motorsports is located at 9032 Artesia Blvd. Bldg C, Suite 301/302 Bellflower, Ca 90706. Their phone number is 562-867-2020.