Stroking increases the air volume and the velocity in the cab increases. Increased velocity reduces the pressure (increased vacume or suction). The increased vacume will pull more gas through the jets. You would have the same effect if you changed to a smaller carb. The vacume would increase, pulling more gas and enrichen the mixture. To compensate you would need to put in leaner jets..
If the increased demand is compensated by the increased gas, meaning the exact ratio the motor need is maintained after stoking, there would be no need to adjust the carb. It seem as that would be the case for your high speed circuits. As stated in the previous post my best guess
would be that your low speed circuits would get to much gas. My guess is based on idling the demand for gas is less then the demand on higher speed, and your high speed mixture seems to be ok . My guess that the low speed mixtue is to rich would of cource have to be tested.
Good indication would be if you plugs came out fouled by soot after city driving, idling on red light etc. Solution would be to go leaner....
I see that W&W cycle in Germany offer a 34 mm. They only inform on the main jet. No info of the other jetting.
I bought my 36mm from Topham in Germany. He jetted the carb based on my info on motor specification with a clear warning I had to test and try.
I started with 40 and ended with a 35 Pilot.
Pilots are inexpesive and you should get yourselves some to test with.
Examplehttp://www.ebay.com/itm/Mikuni-VM22-210 ... 2b&vxp=mtr
Again i strongly reccomed Panics booklet. He sells it as PDF, and you will have it today in your mail if you order it.http://victorylibrary.com/MIK-HD.htm