weisco piston for tecate, which one to get, and what size tires?

[82-8250R]

ok im going to be ordering a new piston soon so whwhich one should i get?

weisco stock bore or one of these dont want to go to much maybe even none.
.25 over
.50 over
.75 over

want it to still be reliable and not loose any of its reliabilaty from being bore over more than it needs, i will late adding a dg exhaust, k&N slip on, carb jetted, aftermarket reed valve with reeds, and maybe a light port and polish, buy want to keep the reliabilaty of it.

Also im gonna need new tires for the rear should i get 18's or 20's what are the disadvantages and advantages of the two. im looking at Razor's, Turf Tammers, Holeshots, and Kenda Klaws. Also want at least 4 ply and 6 ply if possable.

Thanks in advance for the help. :beer :TrikesOwn

[BigGreenMachine]

I'd go with the stock sized piston, this is so in the future when you need to bore the cylinder due to cylinder wall damage you have lots of cylinder wall left to do so.

If you want more power from a larger bore I believe Sprock Racing or someone makes a 330cc kit using a jet ski piston and rod to bore and stroke the motor.

As for tires, Turf tamers and 18 inch holeshots are 2 ply. 18 inch razr's and klaws are 4 ply. 18 inch tires reduce top speed and ground clearance underneath the axle carrier but they make the bike snappier (better throttle response), better for wheelies and sliding and make the bike alot more stable. 20's do all of the above too but don't have such a dramatic affect on ground clearance and top speed.

[82-8250R]

ok so ill proabaly get a stock bore piston to start with and get some 20's then
thanks james