ATVPT

• We are using for this application on the Prairie 650 with a our Full System, 145 Front & 148 Rear Keihin Round.
• If we had just a slip on system on the Prairie 650, we would use, 142 Front & 145 Rear Keihin Round.
• For more specs on what jets you need for your application check out HMF's Spec Section: http://hmfengineering.com/jetting/index.php

I was told you could get at your jets really easy by removing the CVT exhaust Boot.

Slip the cvt exhaust boot off. Be careful with the clamps, they are pretty lame and will strip easy.

I tried getting at the carb to remove the jets from this position, but it seemed like way too much effort to get at your carbs this way. There seems like there is way too much realestate in your way.

I found the easiest way to get at your jets was to release the 2 clamps holding the carbs to their manifolds, and also remove the fuel line to the carbs. Then just roll your carbs on their side and remove the bowel from the top of your bike, where you can see what's going on. Do each jet the same way, just remember to install the correct jet in the right position, either front or back.

Remove the four screws holding the bowel on.

Remove the jet with a appropriate sized flat screw driver.

Remove the stock jets. Remember to properly mark their size and what location(either front or back position) they were removed from. If you ever want to restore your atv to stock again and re-jet to stock specs, you will need these oem jets to do so.

Install each new jet in the correct position. Tighten with your screw driver. Repeat this procedure for the your other jet replacement.

Make sure you keep your work area clean. You do not need any kind of debris in your carbs. Make sure the o-ring gasket is in place and place cover back on your carb. Install four screws, tighten so there will be no gas leakage. repeat this procedure for your other jet replacement.

Re-install your carbs. Snug up your clamps tight enough that they do not leak. Install your gas line to the carb. Re-install your cvt exhaust boot, and button up the rest of the bike. Crank your atv up and check for leaks and see how she sounds now!

• Degree of Difficulty:
• Re-jetting your carbs is a fairly straight forward job. You should have no trouble doing this job in a couple of hours. Just remember, this re-jetting job needs to be done if you attach any aftermarket exhaust, plus most of the time with the addition of an aftermarket CDI Module as well.
• Sometimes you might get away with a smaller sized jet kit, but be careful, this is your ride you are working on. If you have any doubts you should consult a reputable mechanic for advice.
• Bottom Line:
• I would recommend using the Keihin Jets. They are reasonably priced and easy to install.
• Note:
• CDW and HMF have been very valuable with their much appreciated advice and technology in making this project happen, and done correctly.