Re-jet????

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Feb 27, 2007 | 08:43 PM

Booey424

Thread Starter

Grand HDF Member

Joined: Feb 2007

Posts: 3,945

Likes: 6

From: Letart,WV

Re-jet????

I have a 2003 883r.I have vance&hines straightshots and a K&N air filter.I also have a screamin eagle coil,wires and plugs.The carb is stock as well as the rest of the motor.Should I rejet? or do anything else to tune it better.I put all the extras on this winter so I haven't taken it out.Seeings how I live near Cleveland,Ohio and the snow here SUXXXX!!!! I have heard yeh and ney on rejetting.So I would like some more opinions on this subject.if possible.Thanks for any and all help.

Tommy

Feb 28, 2007 | 10:29 AM

rh8234

Elite HDF Member

Joined: Jul 2005

Posts: 3,968

Likes: 34

From: Lockport Township, IL

RE: Re-jet????

If you put onfreer flowing intake and pipes, you most likely will need to re-jet. When you get a chance to ride it, if you get a lot of popping on decel and some carb farts while running, you will know your are too lean. Study up on reading the spark plugs in your manual too. That will give you good feedback on whether you are too lean or not.

Feb 28, 2007 | 02:27 PM

bobcowan

Road Warrior

Joined: Dec 2005

Posts: 1,950

Likes: 2

From: Colorado Springs, CO

RE: Re-jet????

The purpose of the carb jets is to meter the fuel to obtain the "perfect" 14.7:1 air:fuel ratio. Yeah, yeah, I know that you alreadyknow that. But think about what that means for the engine (any engine). The carb is set up to flow a specific amount of fuel to match the specific amount of air as designed by the factory engineers.

If you make changes that improve air flow, you must also make changes to improve the flow of fuel. A simple concept; but so simple it gets forgotten.

To make more power, you need to burn more fuel.

If the changes don't require you to change jets, you wasted your time and money.

Go to the nightrider site, there's an excellent carb tuning guide.