FUEL
SYSTEMS
EXHAUST
DRIVE LINE
HANDLING
ELECTRICAL
WATERLINE/
BILGE
BODY
SERVICE TOOLS
/
HARDWARE
CHEMICAL
HANDLEBARS
&
CONTROLS
ACCESSORIES
ENGINE/
GASKETS
4
No.
1.
1
a.
2.
3.
4.
5.
5
a.
6.
6
a.
7.
8.
9.
11.
12.
14.
15.
16.
18.
19
a.
20.
20
a.
Description
Gasket Pump (2)
O-Ring
Diaphragm, Pump (Clear)
Check Valve (2) (Clear)
Grommet, Check Valve (2)
Diaphragm, Damper
Diaphragm, Damper (small hole)
Gasket, Damper
O-Ring
Filter
O-Ring, Hi Speed
O-Ring, Low Speed
Gasket Valve Body
Check Valve (Clear)
Pin, Arm
Arm (Stainless)
Diaphragm Assembly
Cover Pump
Body Assembly Pump
(
Must use w/O-Ring 1A)
Stop Screw, Idle
Stop Screw, Idle
Socket Bolt Kit
Super BN 44/46
59-9131
CARBURETOR
SOCKET BOLT KIT
Description
Mikuni SuperBN
Part No.
59-9131
Replace the stock phillips bolts
on carbs with stainless steel
socket head bolts.
MIKUNI ARM SPRINGS
Description
65
gm
80
gm
95
gm
115
gm
Part No.
53-2614
53-2613
53-2612
53-2611
POP-OFF PRESSURE CHART
115
grams
55
p.s.i.
32
p.s.i.
22
p.s.i.
19
p.s.i.
1.5
2.0
2.3
2.5
95
grams
43
p.s.i.
25
p.s.i.
20
p.s.i.
17
p.s.i.
80
grams
38
p.s.i.
21
p.s.i.
17
p.s.i.
14
p.s.i.
65
grams
32
p.s.i.
18
p.s.i.
15
p.s.i.
12
p.s.i.
Needle
Valve
Size
Arm Springs
Part. No.
53-2611 53-2612
53-2613
53-2614
VITON TIP NEEDLE &
SEAT ASSEMBLIES
Standard BN Carbs
1.5
2.0
2.3
2.5
2.8
Part No.
53-2500
53-2501
53-2502
53-2503
53-2504
Super BN Carbs
1.2
O-Ring
1.5
O-Ring
2.0
O-Ring
2.3
O-Ring
2.5
O-Ring
Part No.
53-2599
53-2600
53-2601
53-2602
53-2603
Screw in
“
“
“
“
21.
22.
22
a.
24.
25.
26.
27.
28.
29.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
Washer (Aluminum - Same as #26)
Spring, Idle
Spring, Idle (Same as #25)
Adjuster, Hi Speed (with Cross Bar)
Spring, Hi Speed (Same as #22a)
Washer, Hi Speed (Aluminum - Same as #21)
Washer, Low Speed (Aluminum)
Spring, Low Speed
Adjuster, Low Speed (with Cross Bar)
Plate, N.V. Retainer
Screw with washer
Low Jet, 60-150 in increments of 5
Main Jet, 95-170 in increments of 5
Screw
Plate, Valve
Valve Body Assembly
Screw (2 pcs)
Screw
Cover (Stainless)
Color
Gold
Dull Silver
Black
Shiny Silver
See bottom of page
a
Early 44
MIKUNI GENUINE PARTS
SUPER BN38 / BN44 / BN46