225 - why not just 220 and stock-size piston?

Got questions? We got answers....
Post Reply
FRECNDY
Member
Posts: 17
Joined: 01:24 pm Apr 30 2011
Country:
Location: LBC

225 - why not just 220 and stock-size piston?

Post by FRECNDY »

This isn't a 200 vs 220 question.

I'm asking about doing a big bore on a 200. EG does 225 with his own piston, but why wouldn't it be almost as good and more easily maintained over the long run to just bore it to 220 size and run a standard 220 forged piston in the 200 motor (assuming equivalent porting adjustments were made)?

Basically, I'm asking, why can't the custom build be more like a stock build? Why does it have to be all custom?
User avatar
scheckaet
KDXRider.net
KDXRider.net
Posts: 3740
Joined: 12:09 am Nov 10 2005
Country:
Location: edmond oklahoma

225 - why not just 220 and stock-size piston?

Post by scheckaet »

I think 225 is the max you can get and most ppl will go all the way to the max since the cost will be the exact same as doing a 220 out of a 200.
User avatar
scheckaet
KDXRider.net
KDXRider.net
Posts: 3740
Joined: 12:09 am Nov 10 2005
Country:
Location: edmond oklahoma

225 - why not just 220 and stock-size piston?

Post by scheckaet »

i can't see any reason why your idea would not work. well maybe one maybe the porting?
In any event, if porting is not an issue, seems like a good idea especially if the cost of a 225 piston is really much higher that the regular 220.
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

225 - why not just 220 and stock-size piston?

Post by Julien D »

I am unsure what piston is used in the 225 kit.
Image
User avatar
Slick_Nick
Supporting Member
Posts: 1675
Joined: 10:06 pm Oct 22 2009
Country: Canada
Location: Calgary, Alberta
Contact:

225 - why not just 220 and stock-size piston?

Post by Slick_Nick »

Besides, the 220 is actually a 218cc engine. You're getting an extra 7cm3!
'00 KDX 220R
User avatar
KDXGarage
KDXRider.net
KDXRider.net
Posts: 14047
Joined: 06:45 am Nov 01 2004
Country: United States of America
Location: AL, USA
Contact:

225 - why not just 220 and stock-size piston?

Post by KDXGarage »

Isn't there a .5mm and 1mm overbore Wiseco piston for the KDX220R?
Thank you for participating on kdxrider.net. :bravo:
To post pictures from a device: viewtopic.php?f=88&t=24128
User avatar
KDXGarage
KDXRider.net
KDXRider.net
Posts: 14047
Joined: 06:45 am Nov 01 2004
Country: United States of America
Location: AL, USA
Contact:

225 - why not just 220 and stock-size piston?

Post by KDXGarage »

Slick_Nick wrote:Besides, the 220 is actually a 218cc engine. You're getting an extra 7cm3!
Isn't it actually 216cc, and you are getting 7cc more (223cc)?
Thank you for participating on kdxrider.net. :bravo:
To post pictures from a device: viewtopic.php?f=88&t=24128
FRECNDY
Member
Posts: 17
Joined: 01:24 pm Apr 30 2011
Country:
Location: LBC

225 - why not just 220 and stock-size piston?

Post by FRECNDY »

Part Number Price Boresize OverSize
750M06900 $170.78 69.00mm STD
Displacement: 216cc
Stroke: 58.00mm
Notes: Pro-Lite, Electrofusion Bore

Part Number Price Boresize OverSize
750M07000 $170.78 70.00mm 1.00
Displacement: 223cc
Stroke: 58.00mm
Notes: Pro-Lite, Cylinder sleeving required, Cylinder replating required, Electrofusion Bore


D'oh. Not the first time I've sucked at internet. Looks like the only reason to stick with 69mm would be to hold another overbore in reserve on the cylinder.
Post Reply