Sunday, February 24, 2013

Road Test of the Map Changes

Since it was 60 degrees and sunny today, and since we are under a Winter Storm Watch, with blizzard conditions predicted for tomorrow evening...I went riding today. The adjustments made to the latest mapping are very close to where I need to be. I believe I'm a tweak or two from being done mapping, for my bike.  If any of you 1250 guys want to try the map, drop me an email at

Friday, February 22, 2013

Have A Question?

If you have a question for The Jester Mafia, you can email us at:

Thursday, February 21, 2013

Do you need an aftermarket ignition module?

People often ask me if they need an aftermarket ignition module. The answer isn't as simple as yes or no. The factory ignition module is adequate, IF you plan NO performance mods. However, I think the factory module and mapping for the Sportsters is far from ideal, even on a bone stock bike. The mapping has far too much spark advance in my opinion.

Since almost everyone installs an aftermarket air cleaner setup, rejets their carb, or at least tweaks the fuel mixture...and  most change the exhaust on their bikes...I submit that an aftermarket ignition is a good investment. If you are planning on installing higher compression pistons or doing a Big Bore aftermarket ignition is a must have.

So Rico...what are my options? There are several aftermarket ignitions available for the 04-06 Sportster. They range from simple plug and play units, to some very high tech auto mapping versions. In future posts, we'll take a look at some of the options available, and the capabilities and limitations of each.

Tuesday, February 19, 2013

Reprograming The TC88A Ignition Module

Whenever I want to try a new map, I always clear the Data Buffer first. This gives you a "clean slate" on which to write the new programming. Can you simply just overwrite the current programming? Probably...but in order to insure that the new mapping is correct, I just take the extra minute or so to wipe the module. After all, why take the chance of loading a possibly corrupted file? 

You can clear the Data Buffer by insuring that your module has power and your computer is talking to the TC88A. Using the TC88 Logging program, select: Communications and then Clear Data Buffer. You will get a warning that all data will be lost. Tell it OK. After several seconds, you should get a message that the Data Buffer is cleared...out with the old. You can close the Logging program if you like.

To load a new map file, you need to do the following. Using the PC Link TC88 program, do the following: Click on File and then Open Table. Select the map file that you wish to load. It should display as a graphic on your computer screen. Next, select: Communications and then Upload To EEPROM. The file should load once and then a second time, to verify. You should then get a message telling you that the Upload is complete. Now you have a new map.

That's the quickie version of how to change out maps. If you have further questions, just drop us a comment and the Jester Mafia will do our best to answer.

Monday, February 18, 2013

Cabs & Exhaust

I want to welcome Andrea Cabiati aka Cabs, as a contributing author on the blog.




Andrea is my Bro from Italy. He is an engineer and an expert on Sportster and Buell exhaust. He is one of the more knowledgeable people you'll ever meet, on older tube framed Buell's and all things exhaust.

Welcome aboard Bro!!!

If you have any exhaust questions, ask them in the Comment section here, and the Jester Mafia will do our best to answer them.

Sunday, February 17, 2013

Rocketman & Carburetors

 George Basore, aka Rocketman...will be a contributing author to this blog.

        He is perhaps the most knowledgeable motorcycle carburetor guy on the entire planet. He is my go to guy for all fuel related questions. So if you have a Harley Davidson carburetor question...feel free to click on comment, and ask.

Saturday, February 16, 2013


One of my 1250 Maps in development:

Rico & Mapping

I have been developing ignition maps for the TC88A ignition module for both Stage 1 and Big Bore Sportsters for several years now. Feel free to post your questions, and comments.


This page is here for all to share their custom ignition tips and tricks for the 2004-2006 Sportsters. We will also share and discuss carburetion upgrades, tips and tricks.