Rotax and Road racing and jetting

[Jeff Salak]

First off how does a Rotax gear compared to a Leopard? Plan on road racing and wouldnt know where to start. 16T drive and 75t on back? This would be at Daytona or Road America. Does Rotax have belt driver for road racing and do they run the same as a chain driven unit?
What jets should i bring for Main Jetting? Buy complete set? Or whats a good base to have to start? Noticed that there are about 3 different types of jets. Main jets, Pillot jets, and inner pillot jets. Do you need every size they make? There is like 25 or 30 sizes for each. This is where I either say screw it or not on this engine. If you have to keep changing all 3 through out the day I'm toast! There in no way I'm going to be able to fumble around with all these and know what the heck I'm doing with it! I know the main jets have to do with weather conditions and I imagine there is a chart or something to help you out. I will start with this and see if anyone can help. I know Dave and Andy can help! You guys out there!!! There is so much more to learn about a Rotax compared to the other Tag engines. Kind of wants to scare me away from it....
Jeff

[JET Karting - Andy Finke]

Hey Jeff-

Breathe, man, it's going to be okay...! This is really easier than it seems. Trust me when I tell you that everyone that runs up front has been where you are. This past season or two has really shown you what all is invoved with running up front, but not all of what to do with it. You'll make it, just stay organized and tackle one area at a time.

I have a pretty good idea where most of this jetting, gearing, and driving needs to be. Some fine tuning and a call to some of the fast Rotax drivers on the coasts will confirm it.

I would run chain, as then you use the same gears you likely have, and it works fine. Make sure you use o-ring chain, and lube it well and often.

Jetting is not nearly as complicated as it looks. During race day you really only change the Main, so this is not nearly as complicated as you guess. An air density gauge from Longacre would help you keep a logbook and learn what changes in the air mean for jetting.

All in all, this is the motor I would run for Road Racing in a heartbeat, and would rather run for sprint. Based on what you have posted on here, this would be a good choice for you this season.

Call me if you have questions. I'll get you set up this summer.


Andy

815.496.9196