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.
WE HAVE A GOOD SUPPLY OF THE SIZE RANGES WE CARRY
Sizes range from 0.58 to 0.78 mm. Stock size is ~0.72 mm. Please use the drop down menu below to select.
Posted by wayne rogers on Aug 16th 2013
i reecently purchased 4 of these for my 49cc grubee and it was amazing how much better throttle response and power range increase, Jim at SBP was very quick to reply to my e-mail to point out the tuning process as outlineed in the expansion chamber exhaust install instructions. the crew at SBP has been there with great advice and great products since I began my build and this is another that exceeded all my expeactations!!! thanks again SBP
Posted by Matt Bear on Apr 8th 2013
Awesome jets. Only way to transform the cns carb from useless to a good carb! Awesomely fast shipping even across the country. Will be a long time customer
Posted by vicente zamora on Aug 12th 2012
I NEVER USED YOUR PRODUCTS BEFORE , I AM IN THE NEAR FUTURE I THINK YOUR PRODUCTS WILL HELP MY NEW MOTORIZED BIKE OPERATE MORE BETTER AND MAKE THE BIKE LOOK NICE ALSO
Posted by BOB HOLSAPPLE on Oct 7th 2011
SBP SENT ME TWO JETS A,66 AND A 68,SINCE I WAS RUNNING SO RICH HERE IN THE MTNS.I NEW TO TRY THE 66... IT RAN ALOT BETTER BET STILL NOT PERFECT...SO I ORDERED ,58,60,62,64 LAST NIGHT ITS IN THE MAIL ALREADY,,, ILL LET YOU ALL KNOW WHAT I COME UP WITH...