ejohnston
CB750 Enthusiast
I have recently installed a 4 into 1 exhaust and pod filters on my 1972 CB750 project and i have read in several different places (including Carpy's site) that with those mods you need to go up two jet sizes. My question is, how do i tell what the original jet size is or was? i pulled out the old jets that have obviously been tampered with and they are 135's! is there any way this is the stock size? they seem too big for me, but ive been wrong before. are all the close years the same main jets? or did the sizes vary alot year to year?
The reason im concerned is there is a relatively good chance these carbs are not from a 1972 and I cant find any way to identify what year they are or what the correct "two sizes up" jets would be for my 72.
Thanks for any help
Eric
The reason im concerned is there is a relatively good chance these carbs are not from a 1972 and I cant find any way to identify what year they are or what the correct "two sizes up" jets would be for my 72.
Thanks for any help
Eric