The Hoolie Crew: Man Day at the Dynos

I won't bother repeating the Dyno Day setup as it is all in the previous Fizzy dyno post. Needless to say, I had no preconceived notions as to what I expected out of the Fizzy for horsepower and the 150hp pull was a nice surprise. As for the ZRX, well that is a whole different story. You guys have listened to me complain about my ZRX over the last year and given that I pulled the numbers I did on the ZRX, I feel the majority of my issues probably revolved around the coil wire that was working during the same time frame. Although I had fixed the coil wire issue on the ZRX and confirmed it ran, I only took it around the block and never ran it hard before getting the Fizzy and putting the ZRX into hibernation. I can't help but think my ZRX was not running as it should have been for months prior to me finding/fixing the coil wire issue and that reinforced some of the negative feelings I had for the bike based on the pitted Muzzy cams and my "imaginary" pinging issues. In any case, you can see from my post documenting my return to the ZRX World, the bike is running stronger than ever and I am extremely pleased with it!

Back on topic, the first pull on the ZRX showed 142hp with an A/F above 15. Bike was so lean it was shooting flames out the exhaust which you can see in the video and really popping on decel. Driveability on the street was good but I was definitely running too lean. As dyno runs were only $20, Dick and Brett suggested we rejet the bike to see what kind of difference we could make going from 135 to 138 mains. Brett ran me to the house in his truck, we picked up all the tools needed and rejetted in the parking lot. I paid for another run and the dyno operator was confused as to why I wanted to run it again. I explained we had rejetted the bike and wanted to see where A/F was at. He seemed duly impressed! Second pull netted a solid 147hp with A/F still being well above 14. At Dick's suggestion, I will come out on the air screw 1/4 turn next time I have the carbs off but I think going up any more on the mains will kill my driveability and mileage. Also, a little lean in Tulsa would only fatten up as I gained altitude in Arkansas so all in all, I think I'd prefer to be a little on the lean side. I'd love to hear anyone's thoughts on the subject.

Maybe it was just my imagination but the bike seemed peppier on the way home and I am looking forward to getting it out where I can really "wick it up"! Looking at the power curve of the second dyno run, I think it explains pretty clearly why we all love the ZRX so much. Overlay that power curve over the Fizzy power curve and there isn't even a question as to which bike would be more "fun" to ride. All in all we had a great time and I feel I got my money's worth for the $60 I spent. It was nice to spend the day with my friends and a bunch of motorcycle guys standing around watching dyno runs like they were a burlesque show. There were some pretty sick bikes out there with one guy trailering his drag bikes from Fayetteville to take advantage of the dyno. Enjoy the videos and pics!