Which piston to get???

[PaperChazerz]

I was looking on getting a 13.8:1 for the R until i looked up a 12:1. But Im not sure which to get. I have the money for either and race fuel is not a problem, I can get alot of it. But i hear that the Hondas have trouble when you start to mod them. Im am also getting a stage 2 cam for it also. Which piston would be a better way to go? I dont want to change my rod for a better piston. Im leaning on a 13.8:1 for now until i read better things about the 12:1. thanks for the help
SEMA

[RedRacer44]

The 13.8:1 is a great piston but it's only a 2-ring piston, going to sacrifice a little reliability but not much. I'm running the JE 13:1 piston with the Stage2 HotCam and man, it rips! The 13:1 is a 3-ring piston also, so not sacrificing much on reliability. I have had the piston for 4 months now and no problems yet. Easy to start, great power, etc. Just saying ya might wanna consider it also, but whatever ya think :D

I didnt have to change my rod or anything with the 13:1 either, which my buddies who have the 13.8:1 didnt change rods either and their motors are holding up fine.

I dont know much on the 12:1, lot of engine builders are using them in the big bore motors like NMotion, 4-Stroke Tech, etc.

Also, in your signature, I dont see anything about a pipe anywhere? You'll really want to get a full exhaust with these mods and if you go with the Stage 2 cam, I'd go back to the 14t front sprocket also but thats just from my experience. I ride MX 99% of the time so my type of riding might differ from yours.

[depotman19]

Go with the 13.8 piston. four strokes love high compression. The more the marrier. The two ringer will offer less drag, being two rings instead of one. I have the 13.5 two ringer from Je and I have no probs.

Who told you modding hondas makes them unreliable. My honda is modded like crazy and I have no probs. Modding your honda can decrease the dependibility, but it all depends on how you take care of your quad

Jake.........

[TRXDresh]

If you want top end, stay away fromt the 13.8. It creates a mountain at top dead center that inhibits flow. you want to go with a flat top piston. The most effiecent piston is one that has no dome. Think of the combustion event happening, then all that force sliding down the side of the mountain.

[jeepnrocks]

i'm running the 13:1 with no problems what soever. the bike pulls like crazy all over the place