how do you drill motorcycle carb jets to make them bigger?
Jay
2010-03-26 17:50:38 UTC
can I use regular drill bits? can you only do this on the main jet? thanks
ive heard people use solder, what for?
Ten answers:
2010-03-26 20:01:10 UTC
Re-drilling jets is not a favored practice, but a method that can get you by in situations where replacements are not readily available, as in a third world venue, or in the case of a vehicle with non-standard, unobtainable jets.
Ordinarily, you just replace the jets with the size you want. Jets are cheap and easy to get. If you need to drill, you use jet drills, carefully sized drill bits that you roll between finger and thumb. I have never done it to a main, only to enlarge very slightly a pair of pilot jets that were going to be hard to come by in the size I wanted.
Solder is to fill an orifice so you can re-drill it to a smaller size.
parton
2016-11-12 11:11:55 UTC
Carburetor Jet Drill Bits
Hormazd Irani
2010-03-27 01:26:14 UTC
These jets are very tiny brass screws with just enough space for a very fine strand of hair to pass. Sometimes even that would not be possible. The sizes involved are measured in the thousandth of an inch. So drilling with your do-it-yourself drill set is totally out of the question.
Normally they are bubble packed and have just to be bought off the shelf in the size that you require.
2015-08-06 19:07:50 UTC
This Site Might Help You.
RE:
how do you drill motorcycle carb jets to make them bigger?
can I use regular drill bits? can you only do this on the main jet? thanks
ive heard people use solder, what for?
Dan
2010-03-26 18:53:01 UTC
Jets are brass, very easy to drill but has very small tolerances so you will need specifically the size you want,
Jets are relatively cheap, keep your stock set and buy what you think you want.
Solder was used to fill up the old ports and re drill for smaller sizes, again buy a new set.
If you don't know what you're doin, don't do it.
guardrailjim
2010-03-27 10:27:48 UTC
Very few companies make "jet drills"
They have to be very thin and the size increments must be
in thousands of an inch - 0.001"
Once you drill the jet, there's no going back.
Best to buy an assortment of jets.
sheerkhan
2010-03-26 17:57:16 UTC
You never drill a carb jet. On some models you can replace them with one with a larger orffice
?
2010-03-26 19:24:47 UTC
we used to do it with a hand thumbscrew drill. But these days they have jet kits you can buy so why bother drilling?