[Rejetting 300ex and other performance mods] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

Pages:1

Rejetting 300ex and other performance mods
(Click here to view the original thread with full colors/images)

Posted by: Mattjns93

I'm relatively new to actually working on my 300ex more than just filling up the gas, so I could use a bit of advice.

I currently have a 12 tooth front sprocket from the stock 13 on my 300ex and I really like that increased acceleration I get from it. I have an HMF slip on coming in the mail, but here is my problem. Will it be really bad for my engine to run it a bit lean since this exhaust moves more air? I can't get a rejetting kit for a month or two.

Second, are there any other relatively inexpensive mods I can do besides the ones I already plan on?:
new head pipe
H&N air filter + rejetting kit

Any tips are greatly appreciated. I just started riding more seriously again, so I plan on dumping a few bucks back into this 300ex. The one thing that kills me is how much it sucks taking this thing off jumps bigger than 8 feet. Man its rough to land.