I guess I might as well let the cat out of the bag. I said earlier (twice) in this thread that I
was a "carb Guy from way back". There aren't too many "carb Guys" around these days, in
fact carburetion isn't even taught in modern automobile schools, because carbs went extinct
in 1988 in the U.S., almost 20 years ago. I have a friend that graduated from an well know
auto technical school....and he told me they don't even teach carburetion any more.

They teach electronic fuel injection, and the care and feeding of the computers that operate
them....as well as the troubleshooting equipment that is used to fix those systems.

Unfortunately, carburetion technicians are fewer and further in between. Fact is, if it wasn't
for motorcycle mechanics, off-road vehicles, and the old school marine mechanics, carburetion
would be totally obsolete due to environmental regulations, and the advancement of more
efficient (fuel injected) engines. These mechanics, when they reach Journeyman status can
work with complicated multi-carb systems. Not everyone has the skills and experience to be
able to tune and re-jet these carburetor system's.

The problems arise when the owners of motorcycles and off-road vehicles change the exhaust
and intake systems, and throw the factory settings so far off, the engine will no longer run
satisfactorily.

This is where ol' Flyboy Dave comes in....I was trained on these carb systems at the Yamaha
factory in 1970. I still have the diploma. I was a carb tuner Professionally for 15 years. Modifying,
tuning, and re-jetting the two, three, and four carb system was my specialty, and I became
Expert at it. I still do this work in my shop today, in fact I just re-jetted a couple machines lately
that had problems with accessory mufflers throwing the carbs out of whack.

This red bike has a set of constant velocity, altitude compensating, downdraft, racing style
carbs. Normally, this would be a challenge for any mechanic, but I still have all my tools
and my own shop to do these types of things. There are a lot of secrets and techniques
involved that I won't bother you with, but trust me....when you drill out the plugged and
sealed factory plugs to the jets that aren't supposed to be touched....

....you better know what you are doing.

See those tiny drills ? They vary as little as .001"....as a hint, sometimes you have make a jet
smaller, because they don't manufacture smaller jets. I have to solder them shut, and re-drill
the jet to a smaller size.

I've been doing this for 36 years....I'm an Expert at it. If you think you can fool me about
a simple carb as big as your thumb nail....think again.

FBD.