i want to build a drag racing atc 250r, i have a stock atc 250r 1985, and i want it to be fast, what do i need to do to it to make it be one of the fasted things out there, and where can i get the parts i need.

 

You can get everything you need from ESR. They sell a 370 kit (stroked 350 cylinder) that is a fast puppy. You can get porting. racing head, reeds, carb, pipe, and igniton from them. They are all great parts also. they are pritty cheap too. Call them up and they will hook you right up.

 

Wait a couple more weeks and you'll have another option. 510r powervalve cylinder will be out real soon.

 

thanks for the help

 

Your tranny will never hold that 510 motor though.

 

Yes it will. Patriot racing makes a bottom end rebuild that is supposed to be real strong for it. Banshees hold up with t-rex motors so why wouldnt a moded 250R bottom end.? Everyone says that they hold up to the 460 kits so I guess wel just have to wait and see. But anyway if I were him I wouldnt buy that cylinder just yet untill we can see how it dose, and see if it has any bugs that need to be worked out.

510 big bore www.cpindinc.com click on products.

 

honda motor should hold that power. Have a tough time making a clutch stick though. Your chassis is limiting what you want to do. You'll never compete with a 4-wheeler chassis. Your best bet is to sell off your bike, keep the motor and run an oem or otherwise aftermarket 250r chassis

 

beech getting closer 3 more weeks will be at pismo dialing it in i will pm you with the date

 

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