I have a honda 250x. the gearing is the same as the 300ex... the stock gearings is a 13...you should have got the top end back with a 14. if you didn't and you go up one more tooth to a 15 you going to lose a lot of acceleration.

 

Hmmm, he's right... At first I thought you were talking about a 400EX. The 300EX probably wouldn't have enough power to pull that gearing well, so with the 14 tooth you will probably be able to rev out higher and have more top end than the 15 tooth sprocket. The 15 tooth sprocket will probably be too much and might actually cause a loss in top end speed.

 

uh guys i have 20in back tires i wont be losing too much cause as of now i have to take off in 2nd gear cause 1st is so low now.thanks for answering my question pushinthelimit that is all i wanted was a simple yes or no answer not "oh get a 400ex"or"amatures talk speed pros talk handling"or telling me a bunch of stuff i already know like the stock gearing.not trying to be mean its just that some people o here are always trying to change someones mind instead of answeing their questions.

 

no prob man.[img]i/expressions/face-icon-small-smile.gif[/img]

 

Sounds like you already have the answer you're looking for. Spend the $15.00 and find out if works for you or not.

 

i am going to it just took almost a week to get a yes or no answer.