Quote:
Originally Posted by TheDarkMagician
I dunno about that where did u read that the internet? It looks legit main looked up the cerial also to clarify the seller most likely doesnt know what they have happens A Lot on amazon stores most likely matching the other prices for similar items (clones) the ad didnt even mention it was keihin and didnt even include a pic of the cast stamp most likely to avoid repercussions of selling things unliscenced so why would thy go thru all that work then not advertise it? I think its more likely they started making them for the clone craze but thats not here or there tho cuz ....still noone answering question about playing with the air screw....? Ive rebuikt a few carbs but never had to mess with the air screw from factory settings? When should u play with the air mixture? Moreover could i lean it out by backing the air screw out more?
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I don't need the internet to know this stuff, I've been working with carbs and bikes for many many many years.
But, if you really need to know this stuff, use the internet and read something. Here is a great example... Keihin doesn't produce PZ carburetors anymore, and haven't for years. That's why I know the one you found isn't real. Let alone the previous fact I mentioned, that the PZ27 was the largest version they produced when they did make it.
Unfortunately, the carb you have listed isn't a real one. If you believe me or not is up to you as I have nothing invested in this personally. I only wish to stop misinformation and present the facts as they are. This doesn't mean the carb you have is a bad one. Hell, I run a PZ30B on my Hawk and it runs great.
As far as adjusting the "air screw", that would be impossible. The idle mixture screw on the PZ carburetors is a fuel screw - aka it controls the fuel fed from the bypass of the pilot jet circuit to the small port behind the throttle slide. Air screws are located before the slide and directly block airflow through the idle air bypass port at the carb entrance.
When should you adjust it? When you encounter idle issue or hard start issues in certain scenarios. Hard starts while hot due to being too rich, or hard starts when cold from being too lean. Needing the choke to start during warm weather, or not needing the choke at all in cold weather. A hanging high idle after letting off the throttle, or a boggy unsteady low idle. etc. etc.
Again, there is plenty of information out there on the internet that you can read.