How do you get the airbox and filter cleaned up enough to get the AC650 with 122 F/R jets up to the point that a Prairie 650 is at stock 138/142 F/R?

Does the AC650 also need the .025" shim mod on the needles like the p650 does?

I am just trying to keep things interesting between two of my friends AC650's and my Prairie.

Thanks

 

First off, different carbs on the same base engine with different exhaust have different requirements. So the same jets in your carbs are probably not gonna work. I do know that the 650 is living with an air box system designed for the 500 and that does restrict air flow. If you put a snorkle type air inlet system on to improve air flow, then the carbs will probably need more jets. of course if you keep it out of deep water ot mud, you can just remove the top to the air box and rejet.

 

removing the air box lid is not an option as we do a lot of water crossings, I guess something was available like the Napa or DG intake hose mod that my prairie can use would help, I am looking for some insight. The exhaust looks pretty similar (well the muffler anyway) to the prairie. What is the difference (besides jetting) in the carbs?

 

Sammy....try drilling a 7/8 hole up front in the air box...on the lid part....it helped mine some......also if u duel out the exhast it will lean u out some.when i did i gaineda fair bit of power....good luck....i had drilled 3 holes up front in the air box................it made it so it would bog on the bottom if u pined it so i covered 2 holes and it was fine......good luck

 

The stock snorkle starts out at around 2" and restricts to 1.5" inlet. Rip it off and put a 2" ID 90 degree PVC elbow on the "stub" sticking out of the airbox. Then you can rejet up to Prairie sizes. VDI snorkle kit

 

Screw prairie size,with the VDI snorkle I am over them and still need to go a hair larger I think.Have the .025" shim as well (my dial calipers said .022")

 

My friend ordered the VDI kit, we will probably going with the 142/145, F/R, that should help him stay at least in the same hemisphere as me.

 

I would suggest 145fr/147r.Depends on your elevation,if you are under 1500' this will get him where he wants to be.IMO

I suppose he could jet down to let you feel better about your lowrider,don't want to beat you at everything.Handling on roads is the only place the kawi is better,I have a car for that.

 

He he he.