not sure what carb you have, looks like they used at least 2 different carbs, one is a mikuni.... If it's a Mikuni the jet should have been screwed in unless you loosened it..
Here is a carb, if yours is like this Mikuni you might want to snatch it up for extra parts, otherwise the jet should be available at most cycle/snowmobile shops.. 74 75 MR 50/MR50 20MM MIKUNI CARBURATOR/CARB/CLEAN: eBay Motors (item 320546691360 end time Jun-17-10 22:20:41 PDT)
Here is a carb, if yours is like this Mikuni you might want to snatch it up for extra parts, otherwise the jet should be available at most cycle/snowmobile shops.. 74 75 MR 50/MR50 20MM MIKUNI CARBURATOR/CARB/CLEAN: eBay Motors (item 320546691360 end time Jun-17-10 22:20:41 PDT)
It has a keihin carb on it . And your right Mikuni main jets screw in . I was cleaning the carb for a idle and low speed issue and just gave the rest a little air blast and then noticed what I did . I like the Mikuni plan, And after years of snowmobile repair I know them to the T. To bad that carb On Ebay Has no slide. But thanks to you 125 I can use a Mikuni and still keep the bike original .:thumbsup: Thanks again