big bore on 01 warrior

[wicked-ride]

where can i find a big bore kit for a yamaha warrior. like a 440cc or a 500cc. i want to bore it as big as it will go. can i get a website to it?

[keglassg]

ive never seen a big bore that size bud. the biggest i have found is a 400 kit from max power and its actually like 396cc's. hot rods/hot cams also sells a stroker kit that same size which is a very reputable kit for durability

[dave76]

Four Stroke Tech makes the 446cc stroker motor, Cycle Works Racing makes a 460 stroker, they also make a 400cc and a 410cc big bore kit. All require the engine cases to case bored to fit the larger cylinder sleeve. Hotrods makes the stroker 400cc (396cc) kit, which is a drop in.

At one time FST made the 500cc (490cc) stroker kit for the Warrior engines, but due to the cost, and the fact it didn't make THAT much more power then the 446, he didn't sell many of em, he claimed output was 52HP, the 446 is 45HP. To make that monster motor he used a Kodiak 400 cylinder and rod (it's taller), then resleeved the cylinder to get a 90mm bore, he would send the crank out and have it stroked 12.5mm to 77mm, then have JE custom make a piston. This motor also came with a bigger carb and a pipe he had made for it. Very expensive.