Mon April 03, 2006 8:00 AM (NEW!)

(I posted this on other forums as well)

I'm not stupid but I haven't messed with a carb. since my old 73 El Camino.

I have a few questions regarding jetting/exhaust mod's and long term reliability. I'm making reference to a Honda Rincon although it will probably apply to most quads.

Can someone please explain in as generic terms as possible the jetting process and how jets in general are replaced/adjusted and where I might locate them. Any other carb. adjustment advice would be appreciated as well.

I'm looking at swapping out my stock exhaust and jetting my Rincon but this is something I want to learn to do myself.

I do a lot of general automotive maintenance, oil changes, belts, hoses, filters, gaskets, starters, alternators etc....but have never really messed with intake. exhaust or internal engine parts but I'm willing to learn. I have an Outlander 330 which I may use to "learn" more extensive mod's/repairs....it got a little beat up and doesn't hold much value to anyone but me since I paid for it LOL.

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OK I'll take a shot at it. This will all be based on the DS as that is my first and only quad. The jets are on the bottom side of the carb inside the float bowl. To access them you need to remove the float bowl cover. The first time I did anything I removed the carb completly which I would recomend because it will allow for a close inspection of any parts and easy access to all areas.

The jets are small brass "fittings," for lack of a better word. They cannot be adjusted necessarily, unless you are reffering to your general jetting. Each jet has a small hole in it and the diameter of that hole corresponds to the tiny number on the side of the jet. Bigger jets flow more fuel, smaller ones flow less. When you put, say an exhaust, on your bike you will be allowing more exhaust gasses to be released, therefore you need more fuel going into the system. You need a bigger jet.

There are two jets that you need to worry about. The piolet jet and the main jet. You will need a carb diagram of the bike you are working on to get a better idea of which jet is which. Basically the piolet jet controlls idle and the main controls your top end. The middle is controlled by the needle.

The needle is accessed through the top of the carb under the round housing. The needle has grooves which hold a small retainer clip. The clip allows the needle to be raised or lowered. A lower needle means less fuel, and a higher needle means more fuel.

This stuff should apply to any carb... good luck!