Best stock bore piston

[Jonas]

What is everyone running for an aftermarket stock bore high comp. piston? How is the power increase and where did you get it?

[Silverfox@C&DRacing]

we run the JE 13:1 with thermal coating

[400EXracer74]

how much more than the piston do you have to replace when you change that part?

[MR.BIG]

With the 13.1 compression can you still run 93 octane or do you have to go to race fuel.

[fastrx450r]

You can run pump gas with the 13:1 piston, but it has to be FRESH gas (a day or two old) and you need a cam with a large amount of overlap, such as the HRC Cam. Not highly recomended but you should be able to get away with it. If I was you and could get my hands on some race gas, I would go with 13:5:1, huge gains everywhere:devil:

[Jonas]

Where do you get the 13:8 to 1 kit and how do you like it?

Also, what are the advantages of your thermal coated piston silverfox.

[Silverfox@C&DRacing]

the advantage is reducing internal engine temp and allowing you to run lower octane fuel.

[Matt102]

What gas do you run silverfox?

[Silverfox@C&DRacing]

93 pump gas or when we race we use mix of 93 and 110.

[benwa450r]

If you can get race gas, go with the Sparks 13.5:1 2-ring piston. It will help from the bottom on up. All you will need is cylinder base and head gasket. Sparks advertises 13.8:1 but it has 13.5:1 on box it came in. You will not be disappointed.:D

[desratt]

yea what he said that sparks kit has got to be the best for a stock bore.
when replacing you need a base gasket, head gasket and a torque wrench.

[Jonas]

what brand of piston is sparks selling? JE, wiesco?

[shamisc]

Originally posted by benwa450r
If you can get race gas, go with the Sparks 13.5:1 2-ring piston. It will help from the bottom on up. All you will need is cylinder base and head gasket. Sparks advertises 13.8:1 but it has 13.5:1 on box it came in. You will not be disappointed.:D

It's 13.8:1 b/c if you use the Sparks Gaskets, they are actually CRF450 gaskets which are thinner and gives you the .3 more. And it's a JE piston. I would buy the piston from Sparks, and the gaskets from servicehonda.com. It will save you a few bones!;)

[1BAD4FIFTY]

I've got a Sparks 13.5:1 piston and absolutly love it!! The only thing that pi**ed me off was the fact that I thought I was getting the 13.8:1 piston that I ordered! By the end of the season I'll be getting a ViciousCyclePerformance 14:1 Hammer Headz Piston in mine.......I can't wait for it!!!!!!!!!!

[benwa450r]

1BAD4FIFTY, Read ABOVE post if you want 13.8:1 Use a CRF head gasket to get full 13.8:1. If you use TRX head gasket, you only get 13.5:1 Ask and you shall receive:D

[cals400ex]

when i get my bike i will be putting in a VCP piston too, well if they are out then. mixxer is one smart man.

[bbrad mulvey]

I keep hereing about mixxers piston. What is so special about it? Anybody out there use Baldwin Motorsports 14:1 piston yet? I just purchased it and Im curious if anybody else has it. When I talk ed to Mark he said it was actually a little easier to kick over than the 13.5:1, but is a HUGE increase in power over stock

[DirtDevilBT]

Ok, so lets say I have a JE 13:1 piston coming in the mail but I didn't know about the thermal coating. And so when I get this piston, is it a very very good idea to have it done or is it too late? Also, when the cylinder is off, is it worth it to have the outside painted or P/Ced black or coated at the same time? Just hypithetically speaking.:D

[desratt]

my experiance with piston coating is not good it seamed the coating wore off fast leaving alittle slop in there.