what are some things that i can do to make my honda fourtrax 300ex go faster??? I want all around speed even out in all low end and top end.. I have the money so suggest anything ive been saving for a while!

 

My '94 is mostly stock too, but I've added a few items without tearing the motor apart that I think can make a world of difference. It will be noticeable to you right away.

Replace your stock air filter with a K&N. In addition to further help the motor breath modify the cover to the air box to add 5-10 1" holes. The 300EX has to draw air through just two small openings in the tube frame so getting air to the box by adding holes is more efficient. I have used some small mesh screen to cover the holes to help keep dirt and grunge out of the air box. Since your introducing more air at a quicker rate you will need to re-jet the carb. Once you re-balance out your air/fuel mixture you will notice the gains made in just throttle response and power.

Next step for me was an after market pipe kit. This also requires re-jetting after install. You can choose your pipe based on your requirement to keep a smooth power band (that you indicated in your note).

Just from those simple modifications you'll probably find next what I found....I had too much motor for the stock rear tires. Get more rubber on the ground and put the extra power to work for you. I think the stock tires are 9" wide, but because of the style tire only about 6" actually is in contact with the ground. Get a flatter style tire like ITP Holeshots or some Bandits. They'll help you hook up better.

Good Luck!
Hillside Hawk

 

I agree with Hillside Hawk. Just think of your engine as an air pump, the more that can get in AND out, the more power it will produce. And some good gains can be made without going into the engine, thus reducing reliability. (Many will disagree with me, but the guys at Honda built this thing pretty bullet-proof, if you leave the rev-limiter intact and don't go radical inside the motor.)
The K&N, opened-up airbox lid, (mine's by Moto-Force), and a good aftermarket exhaust (I have seen dyno tests done on a 300 EX and the Supertrapp made the most power) will net you some tire burning, wheelie-pullin' power.
Many people change cams, carbs, heads, etc.. but then they end up working on their wheeler all the time.
And when you get the power that you want, tires are the next thing that you need to get. I have just installed Holeshot XTC's and they are really what you need to get the power to the ground. There are other brands out there, but watch what your buddies ride on and see how the tires work for them.
Before you spend your hard earned bucks, make sure you get all the info to make a good choice.

 

The supertrapp pipe is a heck of an improvement.I bought a 4 yr old used pipe and header and wouldn't trade it for a new pipe of any sorts.I drilled (9) 1 inch holes in my box lid,put on a 14 tooth front sprocket,and put a 130 main jet in and its not the same 4whl i bought.It'll hang with the warriors and pull the front end up in second.Make sure you spend the time and get the main jet right.And you may have to change main jets with the riding season,if where you live you see the temp extremes from pretty hot to cold.

 

if ya wanna override the rev limiter on the top end, just put a zip-tie from the reverse lever, up to somewhere on the frame, don't ask me how it worx, but it does. because it wont go into reverse without the lil red button/clutch/neutral, you wont hurt the bike, ive done it for years, just use your head, cause wen\ u dont got a rev limiter, you CAN and WILL install a window with a rod out the front of the motor, friend did it to his 250x

 

Hey Guys...... this is exactly what i was looking for... Some cheap ideas, I have been trying find some cheap ways to up my 250X capabilities... With my fat *** on there it is kinda sluggish... Do you know of any aftermarket repair manuals that i can learn more about working on my carb??? I need some suggestions... thanks!!!!

 

I would like to do this to mine but I don't really understand.Will you expain it better? thanks

 

Like scotster said,the quickest ,cheapest ,easiest improvement would be a 14 tooth gear.It is the best 15.00 you can spend.

 

where can you guys find a 14 front tooth sprocket?? Ive looked everywhere i have heard of, cant find it.... wellthanks!!!!

 

I bought one from MAJIC RACING for my 300ex they can hook you up.