Sportster shutting off at idle after start up or mid ride

[msg051086]

Hey there, this has happened a couple time. I was riding my bike and would start up fine, i would let it warm up normally and go out to the store. On my way if i would be at a light long enough my bike would go from normal idle then would just shut off, id restart it and continue on. It has never shut off mid ride. I don't have it at a low idle speed. Just wondering if anyone has run into this problem. Let me know. Thanks

 

[fin_676]

A blockage of some sort in the slow jet could cause this sort of issue
I have had a similar issue caused by carb icing the shape of the venture and the cooling effect of the fuel vaporising and the thermal transfer efficiency of the metal the jets are made from can cause the jets to get very cold any moisture in the air can freeze as it contacts the jets and create an ice blockage of the slow jet
when the engine stops the freezing stops the heat from the engine quickly melts the ice and the bike will then run ok again
Usually occurs at temperatures of 15 centigrade and lower when the moisture content is fairly high (rain/humidity)

Brian

 

[Jack Klarich]

Here is an exploded view of your carb






NO. PART NO. CARBURETOR ASSEMBLY
DESCRIPTION XL883C
SPORTSTER CUSTOM RETAIL

PRICE EACH
1 3275 SCREW 4 2.49 1.99
2 10014 CLAMP 2 1.49 0.99
3 11291 SEAL, MAP SENSOR 1 1.99 1.99
4 26995-86B SEAL, INTAKE MANIFOLD 2 2.49 2.49
5 27002-89 SEAL RING, CARBURETOR 1 8.99 7.49
6 27009-86A FLANGE, MOUNTING - FRONT 1 6.00 4.99
7 27010-86A FLANGE, MOUNTING - REAR 1 6.00 4.99
8 27024-04 INTAKE MANIFOLD KIT W/ REF # 56, 58, 60 1 127.99 105.99
9 27090-89 MAIN JET (DOMESTIC) 1 7.49 5.99
9 27114-88 MAIN JET (CALIF ONLY) 1 7.49 5.99
10 27100-88 NEEDLE JET 1 8.49 6.99
11 27101-88 NEEDLE JET HOLDER 1 8.49 6.99
12 27124-89 E-CLIP 1 0.99 0.99
13 27125-89 WASHER 1 1.49 0.99
14 27126-89 LEVER 1 8.99 7.49
15 27127-89 WASHER 1 1.49 0.99
16 27128-89 PIN 2 0.99 0.49
17 27130-90 IDLE SCREW 1 1.49 0.99
18 27136-90A SPRING 1 2.49 1.99
19 27137-81 WASHER 3 1.49 0.99
20 27146-89 SCREW W/ WASHER 3 1.99 1.49
21 27148-89 WASHER 1 1.49 0.99
22 27156-89 ROD 1 2.99 2.49
23 27157-89 O-RING 1 0.99 0.99
24 27158-89 DRAIN SCREW 1 4.49 3.49
25 27162-89 SPRING 1 3.99 2.99
26 27171-89 SLOW JET 1 7.49 5.99
27 27777-04 FLOAT CHAMBER ASSEMBLY 1 131.49 108.99
28 27260-00 PUMP HOUSING 1 34.99 28.99
29 27261-96 TOP, CARBURETOR 1 10.99 9.49
30 27262-96 SCREW, TOP 3 1.49 0.99
31 27263-96 COLLAR 1 1.99 1.49
32 27311-76 CAP, ACCELERATOR PUMP (RUBBER) 1 3.99 3.49
33 27315-88A SPRING 1 1.99 1.49
34 27317-88 SCREW 1 1.49 0.99
35 27320-04 BRACKET 1 26.49 21.99
36 27360-76 O-RING 1 1.49 1.49
37 27361-76A DIAPHRAGM, ACCELERATOR PUMP 1 15.99 13.49
38 27362-76 SPRING, DIAPHRAGM 1 1.49 1.49
39 27363-88 HOSE, OVERFLOW 1 6.49 5.49
40 27368-76 CLIP, OVERFLOW HOSE 1 0.99 0.99
41 27371-76A FITTING 1 11.99 9.99
42 27490-04 CARBURETOR ASSEMBLY (DOMESTIC) 1 444.49 368.99
42 27495-04 CARBURETOR ASSEMBLY (CALIFORNIA) 1 444.49 368.99
43 27575-88A PIN 1 2.49 1.99
44 27576-92 FLOAT 1 13.49 10.99
45 27577-92 O-RING 1 4.49 3.99
46 27579-88A SCREW 4 2.49 1.99
47 27580-88 CABLE GUIDE 1 3.99 3.49
48 27581-88 STARTER CAP 1 4.99 3.99
49 27582-88 CABLE SEALING CAP 1 3.49 2.99
50 27583-88 STARTER VALVE 1 6.99 5.99
51 27585-88 VACUUM PISTON 1 48.49 39.99
52 27586-88 SPRING SEAT 1 5.99 4.99
53 27587-88 SCREW 1 1.49 0.99
54 27886-78A VALVE W/ REF # CLIP 1 20.99 17.49
55 28026-04 JET, NEEDLE (CALIF ONLY) 1 8.49 6.99
55 28027-04 JET, NEEDLE (DOMESTIC) 1 8.49 6.99
56 32316-99 MAP SENSOR W/ REF # 3, 57 1 43.00 35.99
57 32424-98 MAP SENSOR 1 43.00 35.99
58 38723-99 CLIP, MAP SENSOR 1 3.99 2.99
59 62347-04 FUEL HOSE, PREFORMED 1 51.49 42.99
60 68042-99 SCREW 1 1.99 1.49
61 27465-04 CARBURETOR (INTERNATIONAL ONLY) 1 444.49 368.99
62 27116-88 MAIN JET (INTERNATIONAL ONLY) 1 7.49 5.99
62 28015-01 PLUG, IDLE MIXTURE SCREW (NOT ILLUSTRATED) (INTERNATIONAL ONLY) 1 1.49 0.99
63 28027-04 JET, NEEDLE (INTERNATIONAL ONLY) 1 8.49 6.99

 

[bubbu]

My 87 sporty used to do that. It was the circuit breakers tripping and then resetting and it would fire up. Embarrassing until I figured it out. Don't think that's your problem but you never know.