yeah my friend wants to know the pros and cons about boring out your 400ex. like....
1. does it burn more gas?
2. cost?
3. any long term affects?
4. how much faster?
5. you know.....

 

anyone?

 

What bore size? Dosnt realy matter.

Burn more gas = yes
Cost = $400-$4000
Long term = May lose reiablility depending on how extreme you build it.
How much Faster = Top speed not a hufge diference but overall usable power will be a huge diference depending on how you mod it.

Check your budget. Then call a good 4-stroke motor builder and see what they offer. Powroll is a very good place and LRD is to. The customer service is better at powroll but they are more expensive.

 

yeah hes lookin at more top end speed right now hes got a k&n air filter, fmf powercore, and thats it. so what bout top end what else

 

change the sprocket