Riders Of Vision

General => TechTalk => Carburetors => Topic started by: supervision on February 12, 2007, 08:10:12 AM

Title: 83 carb low speed mixture screws
Post by: supervision on February 12, 2007, 08:10:12 AM
  I have been taking apart a set of carbs, they sure went to a lot of trouble on the way they control the low speed needle screw!  My guess is that that they wanted the needle to come into the carb at that steep angle, and then they couldn't find a way to fit the adjusters in that direction. 
Title: Re: 83 carb low speed mixture screws
Post by: Coil Coyle on February 12, 2007, 08:46:49 AM
SV,
     Isn't that related to the spring loaded vacuum thingy that people call the mixture screw? My guess is the goal was to bypass pure air to the low speed under high vacuum, no emissions when the throttle is slammed shut. But I'm guessing. :P

;)
Coil
Title: Re: 83 carb low speed mixture screws
Post by: Walt_M. on February 12, 2007, 08:03:09 PM
And, due to EPA emission regulations they did not want anyone to monk around with the factory settings! By the way, my '83 carb settings are pretty much stock except for the accelerator pump which gets a little more stroke. And it runs/ran great. Can't blame my recent misfire on carb adjustment.
Title: Re: 83 carb low speed mixture screws
Post by: Lucky on February 12, 2007, 10:18:04 PM
Quote from: Walt_M. on February 12, 2007, 08:03:09 PM
Can't blame my recent misfire on carb adjustment.

don't be so sure, lol...i'm pretty sure my high blood pressure, burnt french toast & the blown out lightbulb in my desk lamp are the result of a set of dirty carbs that I THOUGHT were clean....

--Lucky
Title: Re: 83 carb low speed mixture screws
Post by: Walt_M. on February 13, 2007, 04:53:10 AM
What I said was 'adjustment'. I'm pretty sure they need a good cleaning, and you know how much I love to clean carbs!
Title: Re: 83 carb low speed mixture screws
Post by: Lucky on February 13, 2007, 07:08:09 AM
oops, my mistake  8)
try a can or two of Berrymans or Seafoam before you tear into it again, they are great 'preventative maintenance' stuff...