200x piston?

[tigger2]

Thinking of putting 10.1 or 10.25:1 piston in 200x but don't know about high comp pistons. I'm wondering if you can use pump fuel, do I need any for upgrades (would like to upgrade the exhaust but i want a supertrapp and they are hard to find), also is it going to shorten the engine life, lastly is it even worth it to put one in.

Would you recommend 10 or 10.25

I know is a smaller high comp piston but like I said haven't had experience with them so could use some input thanks

[AutoXer]

makes it hard to start (200x kickers have issues already) 10.5to1 high octane pump fuel 11 to 1 race fuel if you are building a race bike with a big cam and carb and exhaust yes it would be the thing to use and send the motor to powroll and get that thing stroked while you are in there

[ctk]

10.5to1 is still fine to use high octane pump gas. I got a x with 10.5-1 and it is easy to start. Still starts on the 1st-2nd kick.

[tigger2]

Im not going to make it a all balls racing machine I just wanted to get a little more out of the X

So what I understand is thant one of those pistons will be fine using pump gas, also it might be a little harder to start.

[WIkid500]

YES you will be fine on premium pump gas. You should be running premium anyhow = no ethanol. As for the kick starter, it will kick a little harder but nothing that your going to think twice about.

[tigger2]

So is it worth it?

[Dirtcrasher]

Not in an 83-85 200X unless it has updated kicker parts.

I'd cam and exhaust those motors before I raised compression. Ethanol stinks but if you ride, it won't be an issue. Just don't let them sit..........

We've never got a "kicker report" on the ones that were back cut and then used for years.

[Vealmonkey]

This is one of those loaded questions. Without knowing how tired the rest of the engine is, it may be a total waste of your time and money. If your lower end is tired, then it will just speed up the engines demise. If you really don't want to dig into the whole engine, then just leave it alone and ride it. Add a bigger cam, a better air filter, a better exhaust and rejet however you need to. But if you really are trying to do this on the cheap, then just pretty much don't do anything. Your next post after the piston replacement just may be, "Just rebuilt my top end and my engine grenaded after 15 minutes!" Choose wisely grasshopper.