1984HONDA XL350R.com

Photo atlas / region

Carburetor & intake

39 photos. Click any photo to see it full size.

Related parts pages: Carburetor insulator

Before

The complete dual carb assembly, engine side. Primary carb on the left, secondary on the right, joined by the linkage and the fuel crossover.
from Carbs off by dinner
Airbox side. The two bores where the airbox boots clamp on. Four decades of grime on everything.
from Carbs off by dinner
Three-quarter view showing the throttle linkage between the two carbs and the cable bracket.
from Carbs off by dinner
Looking down the secondary bore. Butterfly closed. Note the brass fittings on the side of the body.
from Carbs off by dinner
Float bowls, from below. Both drain screws present, both stuck.
from Carbs off by dinner
Top side. The two float bowl vent caps and the linkage spring. Photograph this angle before you take the linkage apart, you will want it later.
from Carbs off by dinner
Straight down the bores from the airbox side. The secondary (right) uses a vacuum slide, the primary (left) is cable-operated.
from Carbs off by dinner

During

Primary (left) and secondary (right) side by side on the bench, before the morning's work. Manual page 4-9 in the corner.
from Carb teardown, by the book
Primary carb body, engine side. The large bore and the idle mixture screw boss.
from Carb teardown, by the book
Looking through the primary bore with the throttle cable still attached. Butterfly slightly open.
from Carb teardown, by the book
Primary from the airbox side with the linkage removed.
from Carb teardown, by the book
Primary, airbox side, showing the three small passages above the bore. Those need to be clear.
from Carb teardown, by the book
Primary carb with the top cover and the accelerator pump cover in place, before removal.
from Carb teardown, by the book
Top of the primary with the vent fitting. Small screws on the tray are from the cover.
from Carb teardown, by the book
Float bowl cavity on the primary with the float removed. Float valve seat and main jet holder visible.
from Carb teardown, by the book
Secondary body with the fuel inlet elbow. The fitting on the side is where the crossover tube seats.
from Carb teardown, by the book
Secondary float bowl cavity. Brass float, pivot pin, and the float valve with its spring clip.
from Carb teardown, by the book
Vacuum chamber side of the secondary. The slide rides in the bore under this cap.
from Carb teardown, by the book
Same part, blurry because I was trying to hold it, the phone, and a screwdriver. Kept for the angle.
from Carb teardown, by the book
Cleaning the jet needle. Paper towel, brass brush, carb cleaner. Don't scratch the taper.
from Carb teardown, by the book
Diaphragm on the side of the carb body, exposed. The rubber is hard and cracking at the edge. Expect to replace these.
from Carbs off by dinner
Primary carb separated from the assembly. Throttle linkage arm still attached.
from Carbs off by dinner
Secondary carb on its own. The long arm on the right is the linkage that the primary drives.
from Carbs off by dinner
Secondary carb from the engine side with the throttle return spring visible on the right.
from Carbs off by dinner
Float bowl off. Float, float valve and main jet visible. Varnish, but not the worst I've seen.
from Carbs off by dinner
Primary carb body, bowl removed, showing the jets and the accelerator pump passage.
from Carbs off by dinner
Throttle shaft and butterfly, secondary carb. The shaft turns freely, which was a relief.
from Carbs off by dinner
Same, other side. The small screw is the throttle stop.
from Carbs off by dinner
Linkage bracket and the cable stop, separated from the body.
from Carbs off by dinner
Keihin casting, primary body, with the linkage pivot. Made in Japan, as it says.
from Carbs off by dinner
Secondary carb with the bowl off, held up to the light. Float pivot pin and float valve seat visible.
from Carbs off by dinner
Looking into the secondary float bowl cavity. Brass float still attached, pivot pin in place.
from Carbs off by dinner
Vacuum slide and spring out of the secondary. The diaphragm is the part to inspect carefully here.
from Carbs off by dinner
Slide, spring and the body it came from. The slide bore was clean, the diaphragm was not.
from Carbs off by dinner

Unsorted

Shop manual, carburetor exploded view. The linkage and the choke lever side.
from Carb teardown, by the book
Shop manual, same page, slightly wider.
from Carb teardown, by the book
Shop manual page 4-9, Carburetor Assembly. The note about new O-rings on both ends of the carburetor pipe is worth reading twice.
from Carb teardown, by the book
Page 4-9 in full. Air cut-off valve, throttle stop screw, slow jet, main jet, float, jet needle, throttle valve.
from Carb teardown, by the book
Carburetor Removal and Float Chamber pages. Note the warning about not prying between the insulator and the engine.
from Carb teardown, by the book