Jetting specs

[Boz Mon]

I will be grabbing a 22mm carb off eBay to run on my 5hp briggs. Someone said I would have to rejet for my snowbike project. Can I buy a cheap jet kit somewhere so I have options? And does anyone know a good starting point?

 

[ole4]

is it a chikuni? on my hs50 tec motors I use a 125 main jet and the stock 15 pilot jet. Do you have any small jet drills?

 

[Boz Mon]

I’m sure I could come up with a tiny drill bit. I was under the impression that I would have to go leaner but maybe that’s not the case

 

[ole4]

no richer but try it stock. if it idles fine after adjustments and dies when you open it it is probably too lean.

 

[Boz Mon]

Ok good. If I have to go rich I can just drill out the jet yea?

 

[ole4]

yes if you have small sizes A 56 drill will drill a hole .047 which is equivalent to a 120 jet. Start there using a hand held drill holder or if you have a small lathe you could chuck the jet and with a chuck in the tailstock drill it. What is the number of the current main jet?

 

[Boz Mon]

I haven’t even checked yet. I might have to order a different carb anyway. Someone said the 16mm is too small and I should have got the 22

 

[ole4]

I’m talking about the 22mm chikuni.

 

[delray]

if you go with this style 22mm carb you will be able to use mikuni jets and the pilots too

like ole said 125 jet is a good start. i believe the stock jet that comes with it is a 95. If I had to guess and the motor is completely stock? you will go down maybe little?
here is a example jet kits you can buy off of ebay for these carb's........cheap

 

[Boz Mon]

Those look exactly like the jets for my jet skis carbs. Good info thanks

yes the motor is just a stock 5hp

 

[DeathStarJanitor]

I have a Chikuni and drilled out the main to 1mm. I am still in the process of tuning but it seems to like it so far.

 

[ole4]

Jet drilling chart