This Jet Kit is for the 01-05 YAMAHA YFM660R RAPTOR  Multi Stage #3 #4 #5 #6

You only get Whats In Photo.

This is not a complete jet kit. it is only the main and pilot as seen in last photo circled in red.

This kits includes four N224.103 type Pilot Jets #25 #27.5 and six N102.221 small round type Main Jets #147.5 #150 #152.5 #155 #157.5 #160 normally the left cylinder is two size smaller main than the right cylinder

and two shim for each carburetor needle.

Multi Stage is for those experimenting with different engine, air intake and exhaust systems.

Let me know if you need to substitute a different size jet

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Modifications to the air intake and/or Exhaust system to your ATV will change the air/fuel mixture to your carburetors causing a lean running condition.

Jet Kits will compensate for the lean running condition.

Lean running conditions can destroy your engine and decreases overall performance.

Jet kits are easy to install but you will need to have some basic carburetor tuning knowledge.

 

refer to your shop manual for carburetor removal and installation.

This is only jetting suggestions for your application.
These are recommendations only, based upon testing at sea-level atmospheric pressure,
a 65-80F degree ambient air temperature,
on super unleaded pump fuel with a stock motor.
There are too many variables outside of our control to give you an exact configuration that works perfectly under all conditions.
Our recommendations are just that, a starting point to reference from.
Higher elevations, high humidity, hotter temperatures are examples that will require leaner jetting.
Colder temperatures are an example that will require richer jetting.
If you are  not knowledgeable or don’t feel comfortable tuning your machine yourself, find a mechanic in your area who is.
We are not responsible for problems derived from improper jetting and/or usage.
Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change
that could alter fuel combustion in the cylinder.

International Buyers – Please Note: 

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.

Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.