What is the best mods for a 300ex is there any under 100$$

 

Remove your airbox lid, get either an UNI air filter if you ride in dusty conditions, or a K&N if you ride in not so dusty conditions, remove your choke from the carb, re-jet the carb (or buy a jet kit), and maybe get a set of different handlebars (the stock ones are easily bent and don't have that great of a feel to them.)

 

Also check out my website for reviews on most of the products I have for my 300EX. It's still in the works, but most of the reviews are up there now.

 

TIRES, if you have not done that already. Get rid of those stupid balooney stock tires. I like Holeshots myself, but I ride in the desert.

 

re-jet re-jet re-jet,, i cant say that enough... remove the airbox lid, buy a d7 plug (stock is d8, the d7 will burn hotter), buy a K&N air filter, a good pipe, or moddify the stock one if you wanna go really cheap, rejet the carb, you can jet WAY past the stock numbers with this set up, i had this same setup with a DG RCM pipe, and i was running a 152 jet, stock they come out with like a 122 or 128. then, after you get some more money, deffinintantly go for tires, the knobbies suck,, i like 20 inch fast trekkers myself, but they wear fast, but they are very cheap, 40 bucks a pop,and they hook up, but still let you slide out of a corner

 

Rejet but I would stay with the stock spark plug. They run hot enough as it is. However if you do go with the hotter plug definetely put a big jet in.

 

they are hot enough, but with a hotter one, you can run a bigger jet, meaning more gas to the cylinder, meaning more power.

 

And also meaning more heat and wear to the engine.

 

that is very true, but a bore kit does the same, puts more heat on the cylinder, and they are reliable, unless of course you put a 450 kit into a 300ex. but you have a point,, the biggest reason i went ahead and ran it in my 300ex is because i was gettin ready to install a 352 kit anyway

 

Wiseco 11:1 piston, White bro's race cam and valve springs, port and polish the head, Uni Filter, Curtis Sparks Exhaust, AC Bumper and Nerfs, TAG handlebars, Pro-design kill switch, Laeger +2 aarms, PEP shocks, Lonestar +4 axle, and Holeshot MX's on Douglas .190's