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[125 rider]

for around $100-$150 what can i do to improve the top end hit on my yz125. I will be getting a new pipe soon but until then i need better mid-top end power.

 

[HiG4s]

http://ericgorr.com/services/porting.html

 

[jrbmx1]

You can change the sprockets for more top end. base gasket, bore the carb, rev pipe, have eric do porting and head work, or all of the above. Good luck.

 

[MoToMaNYz125]

[for 160 you can get the FMF rev pipe for your yz too improve top-end, and you can also go 1-2 teeth down on the rear sprocket, 1-2 teeth do make a difference!:cool:

 

[125 rider]

I wish i could get the rev pipe that would be great but they dont make one for my bike...i might go pro-circuit.

 

[spanky250]

You will get far more of a performance increase with porting than you will with a pipe change, and for less money as well. Most modern bikes (KDXs are an exception to this :confused: ) have stock pipes that are so good that aftermarket pipes mainly just move the power around in the rev range, with only a small power increase. Porting, if done right, will increase the power and response across the entire rev range. A pipe is a good tool for fine-tuning the power for your tastes and riding conditions, but porting is by far the best bang-for-the-buck performance enhancement you can do, and Eric Gorr can port your cylinder and stay within your stated budget.