My brother just bought a kawa 360 prairie 4x4 last month. I have rode it a few times and even though there is no comparison to my kawa 700 prairie, it is a very nice mid range quad. I was wondering if there are any engine mods to help boost the top end. It has very good low end grunt, but I think the upper end is slighty lacking, but that might be because I am used to my 700 prairie. Thanks for any help.

 

That's the million dollar question, lots of things have been tried, havn't heard of much success to this point. Your dealing with a motor that has 8:3:1 compression.

 

couple of jet kits appearing on the market for the 360----Dyna jet has one and Rockymountain atv sells a K&N kit for the 360----or he might want to try shimming the needle jet with some washers himself---i presently have about .060 shimmed---mine has never run better

Hey Uinthas---whats this 145 main i see in your thread?????????????????????????
I am still at 150 but have considered going leaner----I still dont see no molten metal on my sparkplug---what do you find with the 145????

 

Oleman, dont know if you seen my previous thread earlier this week but here it is <a target=new class=ftalternatingbarlinklarge href="http://forums.atvconnection.com/messageview.cfm/catid/9/threadid/412622.cfm">Reading
Plugs</a>

Anyway I was always confused why the top ring of the plug was black & the ground electrode was white, so I was always thinking I was lean. According to Kawasaki for my elevation 4700 - 7700 ft I should be using a #145 but was always scared because I thought I might already be lean. Anyhow newbeatle responded to my questio & it appears I have been reading my plug wrong, the wring is where you read jetting according to him. so if that's the case I'm rich. My buddy owns a 650 & he runs 130 f 135 r & kawi recomends he run a 132 f 138 r so he actually running leaner then Kawi recomends.. I just installed the 145 last night so havn't really tested it out yet, hope it's okay though, I let you know

 

Did you make your own shimmes or buy one of the ones you mention???? That sounds like the way he might need to go. Thanks for the good information.

 

I made my shims---I was able to borrow a micrometer from work---just bought some small brass washers and flat filed them to my specs---easiest mod i ever did---although if i had to redo, i would consider the dyna jet kit

Uinthas---I did miss your post--I have been doing a lot of traveling lately---but mine is the same, top thread is black---i measured my alt. with a gps and i am around 2000ft--- I know my quad runs fastest with the 150 main, but i never tried one any leaner----let me know what happens---I dont know if i am riding mine to hard or what, but every brisk ride and my fan seems to be running alot!!!! I remember stating in the past with the bigger mains in, i dont remember the fan running so much----keep us posted