2-stroke kart 3-port exhaust porting 100cc

Bradley71

Member
Does anyone have any good photos of some extreme exhaust port work on a 3-port exhaust.i cant find anything on google..
I seen some old 2 window porting pics.but would like to get idea.
does anyone also have any open/close numbers of open motor porting.
If ya could post or message me some photos.thanks bradley
 
I think you’ll find that info to be proprietary. Normally to get info like that you need to pay the money to have a well known builder do one for you. Then you’ll have what your asking for. Exhaust porting is just a small part of getting more power from an engine. Everything from the air intake to the exhaust chamber has to work in harmony like a fine tuned instrument.
 
12.jpg



11.jpg
 
Pete do u see the edge of that liner where i have the scraper pointed that dude is a square edge,about 1/16-1/8” higher than the aluminum,should that edge be rounded or are did they cheat the cylinder liner to change roof heights
 

Attachments

  • 3D89937B-BDAB-4389-B0D9-CF59B8D7C8DA.jpeg
    3D89937B-BDAB-4389-B0D9-CF59B8D7C8DA.jpeg
    82.3 KB · Views: 52
  • 241E89FB-89AF-4C77-823C-1A61E0D18234.jpeg
    241E89FB-89AF-4C77-823C-1A61E0D18234.jpeg
    50.8 KB · Views: 53
Difficult to guess whether that was intentional, or a consequence of some mod work that didn't quite turn out as planned.

What is the brand of cylinder?

PM
 
Difficult to guess whether that was intentional, or a consequence of some mod work that didn't quite turn out as planned.

What is the brand of cylinder?

PM
Italsistem.
The tops of the ports have been ground on the aluminum but the bottom of the transfers are conservative 1/16” off the aluminum like a step.
 
Does the exhaust port in the liner match the aluminum both top and bottom?
It does match at bottom of exhaust but the bottom corners radius’ dont match,so that tells me its been ground..you see where the circled shiny parts are thats the roof grinding marks.Someones deffinatly did some hogging on it.it may just be like a reedjet liner in it or something.doesnt iame liners have iame stamped on em..
 

Attachments

  • 29FAB8EA-D024-4E26-80EA-27D686DB7BCF.jpeg
    29FAB8EA-D024-4E26-80EA-27D686DB7BCF.jpeg
    73 KB · Views: 40
  • EEED1817-EFDD-4B59-B8F6-14F25C343EAC.jpeg
    EEED1817-EFDD-4B59-B8F6-14F25C343EAC.jpeg
    93.4 KB · Views: 38
Back
Top