Port mapping

[007Calvin.C.]

Has anyone done a port map on a 125cc
Just wondering how close my measurements are to any one eles
It's not often that I do a port map

[Bullfrog]

I don't have any port maps for you - but may be able to help a bit with the following information.

Exhaust port height (distance from top of exhaust port to top of cylinder/head gasket surface) for the 125cc Hodies is as follows:
Model 94 Wombat iron cylinder, piston port - 32mm
Model 03 Wombat alloy cylinder, reed valve - 30mm
Model 95 Combat Wombat alloy cylinder, piston port - 28mm
Model 97 Super Combat alloy cylinder, reed valve - 26mm

Hope that helps.
Ed

[007Calvin.C.]

Thanks
looks like I got it
I am impressed on how well mapped out this cylinder is
Worked on all kinds of bikes and snowmobiles over the years but the fit and finnish on these engines is something I haven't seen for awhile

[007Calvin.C.]

Exhaust port 3/4"×1 3/8"
2 1/4"from skirt to bottom of port
1 1/4"from top of port to top of cylinder

[007Calvin.C.]

Exhaust port 3/4"×1 3/8"
2 1/4"from skirt to bottom of port
1 1/4"from top of port to top of cylinder

[Bullfrog]

The 1.25" measurement converts to . . . 25.4mm/in X 1.25in = 31.75mm. Which means you have an iron Wombat cylinder (model 94) - nominal 32mm exhaust port height.

Ed