will a wiescoe piston kit give me more power for my 400ex? and does it come with rings?

 

only if it is differant than the stock like a higher comprssion or larger piston

 

No it will not give more HP. You need a stroker kit for more hp. Even a cam, porting, bigger carb etc...

 

So an oversized or higher compression piston, won't incease power???????????????


WOW!

 

Not very much because you did not change the stroke. You may only get about 1-2 hp gain by going to a larger size. The stroke and head work is where the most hp gains will be at.

 

So a 2 hp gain(7.4%) is not enough gain for you?

I have a stroked 400ex. Is gained a ton of torque, but my horse power isn't that great.

I put a higher compresion piston in a 450R, and it helped alot. The difference between $800 ans $125 is substantual, when looking for a little more power.

 

When you are looking at 30+ hp no 2hp gain is not much. Higher compression will give more torque but you need to change the stroke to get the advantage of hp gains. If just changing a piston would gain noticeable hp everyone would be doing it.

 

The 400ex isn't 30 plus, its 27. You can gain power without stoke a crank.

 

I know you can add power by adding bolt ons, head work and stroker kit but just adding a piston will not give you much gains without doing motor work. I was useing 30hp as just a number. Not actual!

 

if you get the higher compression piston it will help your power. and it comes with rings wristpin and bearing and circlips