who made a big bore kit for the 350x?

[trainingwheeler]

anyone know who made a big bore kit for the 350x? how big ? whats the biggest?

[Tri-ZNate]

:cool: www.Powroll.com. Their largest is a 430cc stroker kit.

And then you could probably add in their 396cc bore kit.

[NOS_350X]

Four Stroke Tech i belive made a 520 X one time.(i rember reading it in a oldschool mag) I would say good luck trying to get them to make one again. http://fourstroketech.net/

[jason85atc250r]

i know TC racing made a 520 cc 350x engine. you would have to send him your engine to do it.

the powroll 430 would be a good rliable one that would last forever.

[Hornetpowerspor]

Curtis Sparks made them in the day. I have one that is a 465cc,( I'd have to double check) The crank has been stroked, and it uses a XR500 piston. It was originally built by Curtis Sparks. As far as I know they are still in business, but not positive.

[deathman53]

curtis sparks in still around and even bigger. unfortunitly they aren't interested in working on 250r's, 350x's, 200x's. Don't expect them to be very willing to service your engine when its needs it. They will tell you, that they don't the materials and stuff in stock, thats what I got when I asked about a 86 200x pipe.