How do you start a Mikuni CV carburetor?
To start, adjust the clip one turn. You can always reopen the needle area of the carburetor to make additional clip adjustments. Slide the needle, slide, spring and throttle cable back into the top of the carburetor in one piece as it came out. Tighten the cap screws to secure the top of the carburetor to the main body.
What kind of throttle bore does a Mikuni carb have?
It is available in 42 and 45 mm throttle bores that are supposed to be used with mild or highly modified engines and stock. The carb also has an accelerator pump technology. This technology allows the carburetor to deliver high quality performance from idle to wide open throttles.
How many Harleys have a CV carburetor?
The only thing common about the Harley CV carburetor would be that over 3 million Harley’s were outfitted with these versatile carbs from the factory.
How do you tune a CV carburetor on a motorcycle?
The carburator should be tuned first by testing the motorcycle, and noting the characteristics of the idle, roll on and full acceleration. After testing you should start with the main jet, followed by the needle clip position and mixture screws.
How can I tune my Mikuni CV carburetor?
The Mikuni CV carburetor can be tuned via 3 methods, the main jet that controls fuel flow during full acceleration, the needle clip position that controls fuel flow during cruising and roll on throttle, and the mixture screws that regulate fuel flow during idle conditions.
When do Mikuni carbs come out of the factory?
When a new Mikuni carb leaves the factory, the floats are almost always set to factory specifications. Working for a Mikuni distributor, I’ve had the opportunity to open up and examine hundreds of brand new, fresh-out-of-the-box carbs. It is extremely rare to find a new carb not set to factory specs (or close enough to work just fine).
When to lower the needle on a CV carb?
If the engine pulls better or is smoother at full throttle/5k-7k in a full throttle roll-on starting at <3k when cool but soft and/or rough when at full operating temperature, it is too rich in the midrange and the needle should be lowered.
What should venturi size be on Mikuni bike?
If you put on too big or too small a carb, your bike is going to run like kaka – if at all. Let’s say your bike is basically stock. You pull off the old carb and determine that the venturi size is 28mm on that carburetor (this can be done by measuring with a caliper).