The story so far...

A Passion for Racing Motorcycles

The 95Racer Project

The Full Story

Below are the actual results from our initial dyno work in August of 2006. The second chart represents the state of the engine as we raced it in 2006.

Now, there is all kinds of information floating around the internet about some pretty impressive claims with respect to horsepower obtained from the ER-6 engine. This is especially true when it comes to some of the aftermarket exhaust systems and end cans. We have actually tested quite a few of well known end-cans (although not all). In our distinct experience, there is surprisingly little difference in the power that you get from them.

The disadvantage that just about all of the aftermarket system suffer from is that they actually shorten the primary pipe. That is, the length of pipe between the header pipe collector and the beginning of the silencer is simply too short to get the most power from it. Our own design suffers the same problem. The stock silencer is actually a fairly sophisticated design and include a primary pipe extension “folded” into the stock silencer.

With only two exceptions that we are aware of, all aftermarket simply silencers replace the stock silencer with their own, thereby reducing the primary pipe length by more than a factor of two.

There is also some evidence that the standard header pipes are too small in diameter. This is certainly true once the engine has undergone any reasonable amount of tuning.

In any event, the following charts illustrate our results. You may think these are lower than “the norm”, but these are real world figures measured at the rear tyre.

 

A word about our dyno results

Our own silencer suffers the same problem as the majority of aftermarket systems, i.e. the primary is far too short. Initial packaging constraints and aesthetics prevented us from an optimal exhaust configuration. We fully intend to correct with the tuned motor.

Zero Map

Optimised Map

The Numbers:

Note: The dyno graphs only show the improvements gained from correcting the fueling via the Power Commander. The engine is completely stock and the same exhaust system (non-stock) was used.