Carburetor jetting trick [YOU NEED TO KNOW THIS!]

BUY IT NOW:

Jetting your carburetor can be frustrating and a timely process, this video should save time and money on your project.

[caduceus]

I especially like the info on cutting off a tiny bit of solder and heating the jet, as well as chucking the jet and using running it onto the drill bit! Thank you!

[mancavecustoms]

Great stuff my guy. Just about getting tired of finding the right needles! This is the next step. Keep it up.

[NutsNBolts]

My dad was a WWII aircraft mechanic, I learned this from him. Use to do it all the time on 70's cars as a teen/20'ish age. Great money saver and if you are willing to try a bit at a time and try it out it works good. And like the man said if you open it up too much a bit of solder and go back down a size.

You are a ROCKET SCIENTIST, I love tricks of the trade of any industry. 😊💪👊

[russellpinner]

after watching your video i sorted my carb issues so thankyou, you de man

[pantherplatform]

That's a really good tip. I have a ton of mikuni and keihin carbs with all kinds of jets but never thought of soldering and drilling.

[dangerouskoin]

If you travel a bit with your scoot, having additional sizes with you isn't a bad thing if you go up or down elevation enough. That said, very nice kit!

[HYBRIDBATTERYSHOP]

Thanks for sharing in that awesome video. I just picked up 4ea mountain sleds, and brain farted the first one by riding it without rejetting. It's toast now but was the ride of my life twin pipe 1998 arctic cat zr 600.

[vickaminski]

Where can i get it and how do the hole sizes correspond to jet sizes?

I have not a scooter but a yamaha banshee with pilot jets and main jets. So what size drill would get a 290 jet for example, is there a guide for that?

[ronbrideau]

Might have found a couple old jets for basic generator type motor in trail bike that could use upgrade. Solder sounds great but I might just put a 1mm hole a .5 mm solder coating over the larger than ~1.5mm existing jet hole. Think there is chance it may even work better with greater spray cone than simple linear jet. Thx

[BenJKlar]

Want it. Need it. Gotta have it. Thanks for the build vids and helpful stuff like this.

[SpoonerTuner]

thanks! the solder tick is a great idea

[southpawfrmguam]

Drill it shut? I literally just took a few hits before you said that and my mind was blown . I was confused but at the same time I knew what you meant, lmao my bad it sounded better in my head. Gonna try drilling the jet on my dirt bike tomorrow 👍🏽

[SG-wvqu]

I have a 300cc icebear zodiac trike.
When I went to put it into forward from neutral I pulled it too hard and now it wont go into forward neutral or reverse. Can someone plz tell me what to do next or where to go I stay in Maryland

[poet]

yep been doing this forever. after i find the right size jet from drilling i just order that. probably over kill but i assume brass is stronger than the solder or that solder may not be all that great long term... idk

but yup this is the way to go for sure

[frez]

that is one helpful piece of knowledge to know there buddy

[wallycleaver]

Just to throw a "wrench in the fire" LOL, Twist drills do not make round holes.  And, they often push metal rather than cutting it, if not maintained sharp.  Have you never deburred a hole?  Where did the burrs come from?  Also, twist drills make holes bigger than their shank size.  Round holes are made with reamers or are cast, possibly stamped in a die, as such.

The jet orifice is not simply a hole size.  If you use magnification, you will see that the jet is ramped both into and out of the restriction orifice, and the orifice wall is rounded, not flat.  The reason is that these forms help to keep the fluid flow in a laminar, non-turbulent manner over a wide range of fluid speeds.  Stepped orifice walls will introduce turbulence, often in a modal fashion related to fluid speed or the pressure difference between the orifice inlet and outlet.

You've probably seen this effect with a garden hose nozzle, where at low pressure the outgoing stream is solid, but when the pressure is increased, an air pocket begins to appear at it's output.  When the pressure is increased more, the solid stream begins to flail about wildly.

Drilled jets often flow LESS at holes sizes larger than smaller sized properly formed orifices, when subjected to high flow rates.

Precision, well formed, holes are seldom achieved with $3 tooling, unless you are not measuring, or not looking very closely.

It is possible to use jet reamers and jet gauges to get much better precision when modifying jet orifices.  Still, these may not flow as well as properly formed jets.  But, there may be no alternative if a suitable source can't be obtained.  OR you can just drill your jets an get Riding!

[k-sell]

I used a 1/16 drill bit for my 212 predator engine

[ernestmurphy]

Awesome advice the predator 212 engine on the generator runs rich it comes with a 76 i think and folks buy a 68 and it seems to work would the tube that the jet holds in the carb need resizing as well?

[noncompliantcali]

Learned the hard way that all jets are different, I just bought a real Mikuni VM22 and tried buy jet kit. Was able to find main jets but all pilot jet kits are for the knockoff vm22. I never tuned a carburetor so don't know what size I need so wanted a kit with multiple sizes but can only find pilot jets for mikuni sold separately so trying to figure out what sizes I need for my Vader 125