Motorcycle Repair: Carb Adjustment (1963 Honda Benly CA95, 150cc), honda benly, screw out


Question
Motorcycle Repair: Carb Adjustment (1963 Honda Benly CA95, 150cc), honda benly, screw out
1963 Honda Benly CA95,
I put gas in the tank for the first time since i bought it off ebay and tried to
crank it up... no luck with kick start and when i pushed the electronic start
button, it just made a clicking sound but the guy who sold it to me said the
starter worked....
So i waited a day and attempted it again and the kick-start worked. it started
up after a few kicks but felt and sounded like it was full throttle, which was
pretty intense. I assumed it was the slide adjustment screw on the carb so i
slowly screwed it out and it ended up dying when i started to adjust it; then i
tried again and it wouldn't start.
I went back and forth with this for a few hours and if i let it sit for a few
minutes, it would start. I could not seem to find the position of that screw
where the bike would not rev so high and sound like it was going to explode.
if i screwed that screw out, it would idle weak and die.... I did do small
adjustments too..

I check the slide and it slid up when i pulled the throttle and when i let go, it
pops back like it should...the grip and the slide both pop back...
But yeah, It seriously was reved SOOOO high when it started and i'd just turn
the Slide screw out to counter it and then it would slow down and die.. it was
like and either or situation where it was either super Rev or dead. It seemed
like i need to screw the throttle slide screw in far to start the bike....

Is it possible that the slide is sticking but the throttle grip still pops back
when the carb is attached? Also is there a starting point for that throttle slide
screw like there is for the air/fuel screw?

i wasn't sure what to do with the choke. From my experience with chokes,
you use them to start only cold and shut them off once it's started... when i
did this to this bike, the bike would stop running as soon as i flipped the
choke up (off).
and one thing to note, I believe this is the original carb so it's the one meant
for the bike.

Answer
Jeramy, High idle conditions can come from over-advanced ignition timing, incorrect ignition timing, sticking spark advancer, air leaks at the intake manifold insulator, carb slide in backwards, throttle cable incorrectly routed or has slipped out of the the center cable adjuster, carb slide sticking in the bore and improper idle speed adjustment.

Clicking sound for electric starter indicates either a low battery voltage condition or dirty starter solenoid contacts.

The choke closes when you pull the lever up and opens when you push the lever down.

Bill Silver