Thinking about installing a Dial-A-Jet on my AC 650 H1. I am going to ride anywhere in altitude at 2,000 -10,000 feet. I really don't want to rejet. It sounds like a pain in the neck. I've been told that Cats will lose hp and perform not as well at altitudes over 6,000 ft. Is this true? Do I need a Dial-A-Jet?Do they work?

 

Yes, Dial- a-Jet does work and the major horsepower loss is caused by the lower atmospheric pressure the higher you go. All engines suffer from it, not just Acrtic Cat.

 

Ive been meaning to get one myself, i hear they work well

 

The instructions give you base adjustments for a number of altitudes, but you can fine tune it for your engine by twicking the dial a little and then make your own list for your motor. I know a guy that has 500 foot notes if he wants, but he usually just check his GPS for altitude and turns the dial and goes. If he climbs more than 2000/2500 feet he will readjust. As his dial is under the seat and easy to reach with the seat off he has the best of jet adjustment deals.