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Ever wonder why some bikes run better than others with the same components?

Why does my buddy’s bike have this jetting and mine doesn’t like that jetting?

For conversation sake, lets assume (Never assume.) that both bikes are in the same condition, same electrics, tuned up, altitude, etc…. (Mileage unknown.)

Why do some bikes require different jetting?

Story:

We had a customer’s motorcycle that began to run rich. All the normal tune-up stuff was ok. He is the original owner and no changes were made. (Exhaust, fancy air filters, etc.)

Question: So why does the bike run richer? Failing ignition? Dirty air filter? Float malfunctioning? Bad fuel?

Answer: Worn carburetor needle jet and needle.

Just like pistons, carburetors are working hard. Slides are moving up & down, being pulled & pushed with intake pulses constantly wearing the inside of the needle jet.

The needle jets and needles are very precise and wear is immeasurable. The detection of this problem is sometimes difficult. (Unless you spend a $100.00 per hour on a Dyno.)

When you drive a bike at normal speeds, you are generally in the pilot circuit, slide cutaway, needle jet and in the needle a bit. These circuits work together delivering fuel to your motor. A little wear in the needle jet and needles is why some bikes with open exhaust, open air filters SOMETIMES run better with almost stock jetting. We wrote a tech article on exhaust systems and tuning and basically said: Select an exhaust system you like and jet accordingly with an open mind. Same with this needle jet, needle topic: Do not go into jetting a bike with a preconceived idea about jetting. Keep an open mind.

We do not know if needle jets & needles are still available or if you really need them.

This was just a story and maybe this will help someday.

Here is what do from time to time.
Consider the needle jet like a drinking straw.
If you poked a hole in the straw, you would get a lesser amount of soda and a bit more air.
In a carburetor, you would get a bit less fuel and a bit more air ( atomized somewhat )

When the needle jet wears..............We install air jets so we can regulate the amount of air entering the needle jet.
This is another "external " method to make these old carb's user friendly.

                                                  Cycle X Rebuilt Carb Program

Procedures:
-Completely Disassembled for inspection.
-Ultrasonically Cleaned.
    This method is the only way to thoroughly clean the passages which are often missed by conventional means.
-We have many jetting packages for high-performance, open air boxes, and free flowing exhaust systems.
    For example:
        Extra gas circuits ( poor mans version )
        Extra gas circuits ( adjust on the fly )
        Cut slides ( instant throttle response)
        Air jet installation ( explained below )
        Wide Selection of jets ( to fit your specific needs )
        Bench tested and bench synched.

Note:
In some cases it could be very difficult to jet or modify carbs for spot-on performance when alterations are made, other than stock.
( Turning screws, raising or lowering needle clip positions or possible jet changes might be needed. )
-Polished Float Bowls ( for a little extra shine )

Prices:
Carb Rebuild (your carbs)
Ultrasonic cleaned.
Parts and labor....... $ 250.00

Additional modifications:
Carburetor set with above mentioned procedures. ( in case you do not have a set or yours are not rebuildable )
add $75

Cut Slides:
Cutting the slides will bridge the gap between pilot circuits and needle position.
Generally used with free flowing air filters or engine mods. ( instant throttle response)
add $39 ( per set of 4)

Porting carburetors ( set of four )
Another way to inexpensively extract more power from stock carbs ( works well with poor mans jet kit )
add $60

Air jet installation :
What's that ???????? ????????????
Read below

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#RC-01 TEMPORARILY OUT OF STOCK

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# #RC-02 TEMPORARILY OUT OF STOCK

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PANCAKE AIR FILTERS FOR THE CYCLE X CARB KIT These air filters feature a free flowing element with a chrome face. We like the off-set mounting flange so the filters can be rotated to your desired look. $ 49.00 per pair # FI-8998	FOAMY AIR FILTERS SET FOR THE CYCLE X CARB KIT Foam air filters with chrome end caps. These are some of our favorites because they look good and are priced right. These are also some of our favorites because they are made in the USA! $ 35.95 per pair #CA-003	K&N Air Filters For The Cycle X Carb System: simply the best for the carb system $ 82.95 FOR PAIR # CA-004
THE ULTIMATE SPARK PLUGS: Apparently technology has reached the spark plug world. There was a few people who have our Carb System and loved the system but went through a few spark plugs now and then. They changed to these NGK IRDIUM Spark Plugs and the plugs had a perfect brown plug reading. We can not take credit for discovering these spark plugs. $ 42.00 SET OF 4 # CA-006	Carb system fuel line pre-bent : Same fuel line used on the superbobber because the fuel line makes a nice bend over the carb. 18 inches. $ 13.95 each # CA-097	Carb system vent line: If you do not like the vent line mikuni uses, use this! Shiny black vent line in 3 foot length's $ 6.95 per 3 feet # CA-098
MIKUNI needle shim kit: This is what we use for precise midrange tuning on our carb systems. Each needle e-clip position moves the needle .040 ( forty thousandths ) at a time. This large adjustment can sometimes take you rich to lean ( or visa versa ). This shim kit will allow you to fine tune your bike in increments of .010 ( ten thousands ) at a time. Note: The needle adjustment will affect your tuning from 1/4 to 3/4 throttle. $ 11.00 # CA-099	Carb Sync tool: These ( 4 cylinder ) are what the factory Honda people used years ago. Mercury gauges have been discontinued ( EPA). These kits are complete with everything needed to sync your bike. ( actually, we like these better than mercury gauges) $ 59.00 # CA-00100	CYCLE X CARB KIT CARB SYNC TOOL : These are the carb sync tools we use. They are quick and easy. Put the tool over the carb and a ball will rise (like mercury gauges) to equal multi cyl. machines. $ 39.95 #CA-007
1 INCH THROTTLE ASSEMBLY (chrome) AND CABLE : Motion pro quality assemblies for you 1 inch handle bar people. $ 49.95 # CA-010		Cycle X manifolds. Build your own carb system if your so smart !!!!!!!!!!!!! 199.00 per set