How do i rejet the jet?

[kolomootro]

so i heard you could change the jet size by soldering and then drilling right?
how exactly do i do this,like which end of jet do i drill and solder and what kind of solder? i want to make it run leaner by the way.thanks.

 

[andrewflores17]

AGK - How To Drill the Main Jets - Affordable Go Karts

heres all the info you could ever want and more on the site

 

[kolomootro]

thanks but i need to make my jet smaller not bigger.

 

[csbtr3]

I was able to use a Weller 100 W gun style soldering iron and normal electric wire solder. I removed the jet and held it with needle nose vice grips and heated the end away from the threads (larger end). When it was hot enough the solder flowed in very nicely, didn't take but a few seconds (20 - 30 ). Then I put the small drill bit I needed in my cordless drill and went at it. I must admit not very precise but it got me in the area I wanted. After I determined the hole size I got a new jet and drilled it out more precisely using a drill press and better hold down clamp. I'm not a pro but it worked ....anyone else?

 

[Venice Motor Bikes]

I use standard electrical solder.
Use the tiniest bit of solder... (Just enough to close the hole without boogering up the jet).
The stock jet in a NT carb is about a #71 drill bit; I solder & redrill it to a smaller # 73 bit. (That usually works well in 66cc HT engines).

 

[talbotti]

why you dont just change the jet

 

[kolomootro]

why you dont just change the jet

because i need to buy tiny drill bits for other things too.i dont wanna pay 4 dollars per jet scince im gonna use one in the end anyways.