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I
I
I
slide lines up with stud inside carburetor body. Make sure top cover gasket is in place and the top cover is in the proper direction. Do
not force slide into carburetor. Install two top cover screws. An optional metal slide is available. See photo III-48.
Float
- To service jets and float assembly, remove slide as above. Loosen front and rear carburetor clamps, then push carburetor rear-
ward until front of carburetor can be removed from intake boot. Remove carburetor from motorcycle. Remove 4 screws securing float
bowl to carburetor and remove float bowl. Be careful float pivot pin does not slip out of place, unless float is to be removed.
To remove float, push float pivot pin to side and remove while supporting float. Withdraw float from carburetor, being careful not to
drop needle valve which is loosely attached to float. Inspect tip of needle valve for wear or deformation, replace as required. Shake float
gently to ensure there is no fuel inside float. To reinstall, hook needle valve onto float, and guide needle into bore. Line float pivot holes
up with holes in carburetor body and insert pivot shaft. Make sure shaft stays centered as float bowl is being installed. To check float
level, hold carburetor upside down and measure from top of float to float bowl mounting flange (with gasket removed). The correct
dimension is
.XXX˝
. See illustration III.46. Adjust float level by bend-
ing the small tab which contact the needle valve up or down. If proper
float level is not maintained, the bike can run very rich or lean, and
may discharge fuel out the vent tubes. Too little float height will result
in an overly rich condition, and too much float height will cause a lean
condition. In severe cases, fuel can fill up the motor which can cause
the piston to lock and create a fire hazard. If you suspect the carburetor
has overflowed, do not force the kickstarter to move! Remove spark-
plug, zip tie kill button in the off position, turn the bike upside down
and allow fuel to drain, rotating the motor slowly with kickstarter. Do
this in a well ventilated area free from fire or sparks!
Jets
- To change jets, use a flat bladed screwdriver to remove main
jet and baffle. If needle jet is to be changed or cleaned, remove with
8mm wrench. Pilot jets and choke jets can also be removed with flat
bladed screwdriver. Use a screwdriver of the proper size and in good
condition to remove jets and use great care not to strip the slots in
the jets, which are soft brass. Larger main jet and pilot jet numbers
indicated larger, richer jets, while smaller numbers will be leaner.
Change jet sizes one at a time. Crack choke and read spark plug as
needed to determine if bike is running lean or rich. Snug jets gently
when replacing. Do not overtighten! Needle jet and choke jet almost
never need adjusting. Main jets are available from number 88 - 100.
Pilot jets are available from 48 - 65.
Needle jets
are available from
XX - XX
. Note: A bigger number for the main or pilot jet indicates a
richer jet, a smaller number a leaner jet.
III
III
.47
.47
Jet and adjustment screw positions
Idle screw
fuel
metering
screw
main jet
needle jet
pilot jet
choke jet
Slide & needle assembly.
Choke assembly, jets, & fuel metering screw assembly.
slide
needle
& clip
needle
retainer
III
III
.48
.48
III
III
.49
.49
choke assembly
fuel metering
screw assembly
washer
o-ring
main jet
main jet
baffle
needle
jet
float
pivot
shaft
fuel
inlet
needle
choke
jet
pilot
jet
needle
& clip
Note: be careful not to
lose or damage fuel
screw washer and
o-ring
