Carb Jets - NT - Dellorto 5mm main jet

Product Description

Genuine Dellorto jet. 5mm thread for use on stock NT 2 stroke carburetor to dial in proper fuel air mix.

NT and NT Speed Carbs

You will need to learn to read your spark plug and learn a bit about tuning prior to changing jets, but it's not too difficult, and changing the jet itself is straight forward. Just drain the fuel, remove the float bowl and unscrew the jet, then reassemble.

Sizes range from 0.58 to 0.84 mm. Stock size is 0.70 mm. Please use the drop down menu below to select.

Product Reviews

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fits great accurate size

Posted by Unknown on 05 18 2020

Would recommend
Perked Up My Engine

Posted by David Burgess on 05 26 2019

Shipping was a little on the slow side but the jets worked fine noticeably increasing performance on my Flying Horse with a Sick Bike Parts HD jack shaft kit.
works in bikeberry hp carb (runtong)

Posted by Unknown on 09 06 2017

Just what I needed.
these are genuine Dellorto jets at an excellent price

Posted by Stick on 01 30 2017

Ordered these on a Sunday night at 11pm. Before I woke up on Monday a.m. they were on their way with a tracking number. Received in Florida in 2 days, very fast.
Posted by Ryne Manion on 08 29 2016

Read the reviews and some forums on which jet to install, so I order the 0.66mm like most people have. I installed it on the NT Speed Carb and now my bike is running smoother and spark plugs color is perfect tan. Thanks Sick Bike Parts!
Posted by dan schaf on 01 20 2014

I took a chance and ordered only a .66 sized jet and seems to work perfect. I can climb this steep hill near my house in 4th gear instead of 3rd gear with the stock size jet and my plug color is a perfect tan color.
Posted by Calvin Schantz on 08 18 2012

Super Fast shipping! Re-jetted my NTTC carb from .72 to .66 and it now runs perfect. These guys are great! Spark plug is dry and light chocolate color in stead of wet and black.
Posted by BOB HOLSAPPLE on 09 16 2011

I HAVE A STORY I ALMOST CANT BELIEVE,,,I HAVE BEEN HAVING PROBLEMS WITH MY CARB, IM AT 6300 FT ELEVATION ,IVE GOT A CARB THAT COMES WITH THE SKYHAWK RACING MOTOR ,I WAS LED TO BELIEVE I HAD AN ''NT'' CARB AND I NEEDED TO JET DOWN FOR LESS GAS. I ORDERED JETS FROM ''SICK BIKE PARTS .COM,NOT KNOWING WHAT SIZE I GOT 5 DIFFERENT ONES,THEY GOT UM TO ME AS FAST AS HUMANLY POSSIBLE ,AND I FOUND OUT I DONT HAVE AN ''NT''...I HAVE AN''CNS''..ON SUNDAY,SICK EMAILED ME TO TELL ME THE PROBLEM,AND I FELT BAD,I F--ED UP...THEY WERE AS NICE AS ANY PERSON COULD BE...THEY SAID THEY WERE TRYING TO FIND UM TOO. THEN ON TUE. I GOT AN EMAIL FROM USPS,SAY I HAD SOMETHING COMEING FROM SICK BIKE PARTS, I DIDNT ORDER ANYTHING,GOT IT TODAY,THEY SENT ME THE RIGHT JETS WITHOUT A WORD THESE GUYS TOOK CARE OF A FELLOW BIKER...IT RUNS GREAT,IVE BEEN FIGHTING THIS FOR MONTHS,SICK BICKS NOW HAVE A DEDICATED NEW CUSTOMER ...
BOB HOLSAPPLE...☺☺☺
Posted by charles richards on 08 25 2011

These guys aint no joke.. Super fast shipping and i put a .66mm on my 48cc grubee skyhawk with the c-clip one from the bottom and my plug is golden brown. Best web site ever..
Posted by Vincent Lamoureux on 07 18 2011

Thanks again to SBP! These are a little tight but DO fit Speed and NT carbs. Don't let the pic fool you the slot goes all the way across the jet surface. They are NOT exact replacements but as i said DO fit.
Posted by Thomas Wilson on 01 20 2011

they are 3 bucks each so i bought 3 to make sure to get the right size
Posted by Chris Kratsch on 10 20 2010

I bought a SBP expansion pipe and an air cleaner for my RAW50 with NT carb, and it worked great! Switching to Opti2 at 100:1, however, had it four stroking too much. Rolled the dice on a .68 jet, and it's exactly right. The jet is a little snug into the emulsion tube, but I don't see myself ever taking it out, so no worries there.
Posted by Howard Holley on 08 11 2010

Oops i bought the wrong size next time ill buy another