[marineengineer]

So I have a 1981 Honda CB750k that will not start and has a fuel leak on the #1 carb. I have 4 rebuild kits and removed the carbs( what a PITA). On the initial inspection the #1 carb DOES Not have a needle adjustment screw, the #2 carb adjustment screw was broken off, #3 & 4 are dirty but rotate. So the question is "Does the #1 carb require an adjustment screw?" . I found the adjustment screws on "Bikebandit.com". So does anybody have any experience with these Keihin VB42a Carbs?

 

[cmonSTART]

Idle mixture screws? I'm fairly sure you're supposed to have 4... What's in place of the missing screw? Anything?

 

[marineengineer]

My initial thought was that the #1 carb. had a plug. I tried to drill it out , inserted a small screw to get to turn. No luck. I guess it's time to get out the PB Blaster to get it freed up. Thanks for the verification.