Table of Contents
Advertisement
FUEL SVSTEM/CARBURETION
Carburetor Cleaning - Mikuni CV
1. Thoroughly clean the carburetor body, jets, and all passages with carburetor cleaner or electrical contact
cleaner.
A
WARNING
Protect eyes from contact with cleaner. If you get cleaner in your eyes or if you swallow cleaner, see your doctor
immediately. Some carburetor cleaners are extremely caustic and extended periods of soaking can loosen the
adhesive sealer on the passage drill-way plugs. Do not soak rubber or plastic components (such as the vacuum
slide diaphragm, needle seat screen, or O-Rings in caustic cleaning solutions. Irreparable damage may occur.
Do not use agitator type carburetor cleaning equipment. Rubber parts must be cleaned with mild detergent and
hot water only.
2.
If the carburetor is extremely dirty or contaminated with fuel residue and varnish, soak for short periods only in
carburetor cleaner, and rinse in hot water.
3.
Replace the jets if they are extremely dirty or have a buildup of fuel residue or bacterial growth. Even a small
amount of residue will reduce the flow characteristics of the jet.
4.
Verify all passages and jets are unobstructed by spraying electrical contact cleaner through the passages.
CAUTION: Do not use wire or welding tip cleaners on the jets as the orifice size may be altered.
5.
Use low pressure air to dry carburetor body and all components.
Carburetor Inspection
1.
Inspect the diaphragm for holes, deterioration, or
damage. Make sure the diaphragm is pliable but not
swollen.
The diaphragm should fit properly in the
carburetor body.
Replace diaphragm assembly if
diaphragm is damaged.
2.
Inspect the diaphragm return spring for damage or
distortion of the coils.
3.
Inspect the slide for wear, scratches, or damage. It
should move freely in the jet block.
Replace if
necessary.
4.
Inspect jet needle for wear, bending, or other damage.
5.
Inspect needle jet.
Air bleed holes must be clear.
Check for wear at the top inside surface where the jet
needle enters the needle jet.
6.
Inspect the inlet needle seat for wear, damage and
foreign material. Check the inside for abrasion or wear
from the needle.
7.
Inspect O-ring for cuts, nicks and abrasions.
The
O-ring must fit snugly on the needle seat and in the
carburetor body to ensure a leak-free sea\. The screen
must be clean and fit snugly on the needle seat.
Replace needle and seat assembly if necessary.
Polaris Industries Inc.
4.33
7/96
Advertisement
Table of Contents
Troubleshooting
