Interesting, the Dyno doesn't show the torque curve below 2800 rpm if I'm reading it right. I agree the chart isn't the best for a touring rig, could be the tune or could be how the engine build was put together. Looks like it would be fun hammering it at the higher rpm's but not really taking advantage of the big displacement in the lower rpm range. What went into the build in terms of cams, throttle body, tuner etc besides the pipes?

 

very nice RGS. I love the denim black bikes. Its only a matter of time until I have one in my garage to sit beside the shinny one!

Congrats on the motor, ride the chit out of it and if you are happy, thats all that matters..

 

The dip likely is the pipe. The ugly jagged lines looks like clutch slip to me? I would hope they upgraded the clutch in that thing when he had it done. The sheets you provided are a better example for sure.

 

Here's what a 120 can look like with a little head work and a Boarzilla. Now that's fun to ride.

 

I know the only difference between the R and ST is the cams. Could that have anything to do with it or do you think it's pipe only?

 

Are you talking about clutch slip on mine? If so it is an upgraded clutch. Bandit Sportsman.

 

Wow. Is that the R or ST?

 

That's an R with SE 266 cams and headwork and your pipe.

 

How much compression was added to this build? With those numbers Ill bet your close to 11:0 to 1.

 

Could be just the pipe. The Zilla is a big pipe. It likes lots of power. The truth is the cams, pipe, intake, heads etc should all be planned to work together as a package. Not independent of each other. Hope that makes sense. Each cam has a sweet spot for compression. That drives the decision making process then to leave heads stock or massage those to match cams sweet spot. Then you can determine the needs of intake, pipe, etc and complete the total package based on how you drive, where and when you want the power to come on and end, pump gas etc. A good builder carefully plans that out after asking you what your needs/expectations are. Then of course the last and MOST important decision is who Dyno tunes it. Typically that is not a dealer.