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« on: 07 September, 2023, 09:18:35 »
Amongst all thearticles that I have collected over years I found this paragraph in an article Tuning your carb.
" Pressed in pilot jet
Ama; 4 stroke carburetors have .016diameterpilot jet (622/107) pressed into the body. It can be cleaned using a 78 drill....016" diameter drill. After cleaning, blow compressed air through the pilot passge.
If the pilot air screw has to be screwed in past 1 i/2 turns in to richen the mixture the standard jet can be enlarged to the next size with a 77 drill (.018") 0r with a 76 drill (.020") as necessary. If you go too far, for the majority ofbikes, a smaller removeable pilot jet (124/026) can be screwed into the tapped hole in the body."
This course of action would have to be a last resort thing, at the moment I would like to get the bike at least running consistently so I can have a go at tuning the carb properly Having checked the plug I can see that it is running quite rich. Unfortunately I am going to have leave off working on the bike for few days because of ohther commitments. I will come back and let you no how I get on. Thanks to all who have gave info.