Jet sizes?

Hi Peter, 3-1/2 out on the EZ-Just is approx the max and you may need to move up a size on the pilot, given you don't have a vacuum leak. However this won't effect cruising speed.

Regarding plug color, modern fuel additives make it more difficult to read plugs without putting longer miles on them. The Tuners Kit you have from us, is this labeled for the pre-2004 1200, 04-06 1200, or a 883 to 1200 conversion? The proper needle for a 04-06 1200 will be different than the early 1200 or 883 conversion and be slightly leaner under cruising to compliment the flow of the XB heads found on those models.

Jet sizes - these coincide with the original sizes specified by the factory (Keihin) and will match original Harley parts. Note that some Harley dealers have been found to be selling some other aftermarket jets (imports) or even DynoJet jets which are very different. If buying main jets from your Harley dealer make sure they are the originals packaged in those white bags with the HD logo. CVP jets and Harley jets are interchangeable.

Also, open pipes are always a challenge. Factory pipes are designed to work with and match mufflers that are baffled at least minimally. An open or unbaffled muffler does not allow the head pipes to scavenge gasses or resist reversion correctly. I recommend if not baffled to at least install some sort of anti-reversion device in the muffler. Google "motorcycle muffler lollipops" for an idea of how this is accomplished.
https://www.google.com/search?q=mot...iDeSJiALkj4G4BA&ved=0CEAQsAQ&biw=1287&bih=646

Ah Ethanol, that explains a little bit. I just realized you are in Sweden. Avoid the 10% E fuel if you can and stick with the 98/5. Regarding the exhaust I can't emphasis enough how important it is to have fresh flange gaskets after installing or reinstalling pipes. I rarely recommend shimming but in your case you could add a VERY thin shim 0.033" - 0.045" (thats in inches) under the needle head.

Note to others reading this thread, do not shim a CVP needle on a U.S. model Harley.

Hi Peter, the exhaust leak I'm referring to is at the heads since those gaskets can get tweaked or moved slightly even when installing mufflers.

The differences between US and European models is slight but are typically the original needle and the ignitions. The biggest difference is with the use of ethanol fuels. The greater the amount of Ethanol the more the air/fuel mixture needs to be increased. I don't recommend ever running E10 or higher ratio ethanol fuel on a carbureted Harley as this will slowly destroy the seals and diaphragms which are not designed to withstand ethanol contact.