I just bought 4 300EX's and want to hear your all time favorite mods and why? Me and my 3 brothers ride trails and chase and race through the woods.

 

Well I have two of these machines and this is what I have done to both of them. I think that you will find thse the most popular mods to the 300EX.

FMF pipe, K&N Filter with Skinz, Re jetted to 125's, Opened air box with a set of six 1" filters. Replaced the air tube with one from a 350X. Same as the EX except a bit larger inside allowing even more air through. Under $300 a machine for all of the above.

This allows the 300 to really breath and quite frankly unleashes it! Your jetting will be different as I run at high altitude to extream altitude.

I have works shocks on one of these machines and WOW! they do make a big difference in feel and handeling! But they are not a cheap add on. My son broke a shock so I choose to replace with these. I also have a twist throttle on one machine, personal preference.

We also run in the hills from woods to open trails. Some sand and about anything else mountain country can throw at ya.

 

Top Cat, thanks. How about Tires?

 

Put the 400EX a-arms and shocks on the 300EX frame using a shock relocation kit from ATV Racing. A super improvement.

See Ya,

Darrin Talbott

 

Hey Darrin,
I was looking at putting 400EX a-arms on a 300EX a while back and all of the measurements look great for fitting them on except for one:
The distance between the upper a-arms bracket holes (left to right facing the quad) is around 3/4" shotrter on the 300EX (as far a I can remember).
Did this make the wheels lean in hard on top?
Did you notice any binding of the ball joints?
Did you use the stock 300EX spindles?
Rick

 

Tires...

Well we run the stock tires... Some real mudder style tires, Blackwater, and just bought some Realtors. They can be swapped left to right to make for a good all around tire or ran the other direction for great sand/snow performance.

For the front I have also purchased but not run yet some Titan fast trekker.

Those Realtors are very aggressive and can pull you up some pretty tough stuff.

 

I have a few mods on my 300EX and they are a DG supertrape pipe, A K&N air filter, rear spacer kit for bigger wheel base,DG nerf bars
DG grab bar, DG bumper, and renthal bars.
FOR TIRES I HAVE BANDITS ON THE FRONT AND HOLESHOTS ON THE BACK, they work alsome
the holeshots let the back end drift out around corners and the bandits prevent the front from drifting for high speed turns and minovers! GREAT COMBINATION OF TIRES

RIDE RED OR GO HOME!

DG_300EX

 

In ATV Sport they did these mods to 300EX:

Modified Supertrapp Pipe $295
TC Racing Cam (exchange w/ stock cam) $115
CDI Box (exchange w/ stock box) $85
Wiseco Piston (10.5:1) $90
New Valve Springs (4) $80
Head Gasket $23
Cylinder Gasket $13

Total $701

They said it helped the power all over.

 

I have a '98 300ex that has Dg nerfs,bumper,twist throttle,white bros.E-
series pipe,jet kit,precharger, and shredders
all the way around. It hooks up well.
Charles a.k.a. quadfreak@yahoo.com