Need to know stock valve length and width 200x 83-85

[oscarmayer]

I need to kow the stock valve size of the 200x stock honda valves. I mean the exact length and the diamater of the seating area. I may have a source for a 2.5mm exhaust upgrade on the 200cc heads if they are the smae length, and it'll be cheap!!!! That would make a hugh difference in performance and flow of the motor!!!! Web already sells a 1mm oversized intake, so take the 1mm intake and 2.5mm exhaust over size and you got a 250cc-300cc worth of flow capabilities when done right! This si exciting stuffs!

[rdlsz24]

I have some at home I can check tonight with my digital calipers.

Rob

[oscarmayer]

k, cool man, thanks! i have a set of ebay specials that i never used ebcause I was concerned on the quality, so I decided not to use them for measurements.

[rdlsz24]

Well mine are used, not new. Does that matter? I don't think they are burnt, etc

Rob

[oscarmayer]

nope it does not. the chinese remans are off from stock specs by as much as 1mm. on the length and .2mm on the seat size (usually smaller)

just gotta be stock valves.

[oscarmayer]

did you get the stock sizes?

[rdlsz24]

What part(s) of the valves are you wanting me to measure exactly? The faces are 25mm and 30mm, but that info is available on other sites like Kibblewhite so I figured that isn't what you need.

Rob

[oscarmayer]

the length of the valve total. and the size of the big head end. that's it.

[rdlsz24]

Alright here we go.

Intake - face: 30mm. length: 92.2mm
Exhaust - face: 25mm. length: 91.5mm

Rob