fe600 tick over probs

Can you ride the bike with the choke on once it is warm?

Well I would suggest going up one or two sizes larger on the pilot jet to start.

The fuel screw is critical also but the pilot circuit jetting needs to be closer I think.

To set your fuel screw warm the bike up and then at a fast idle turn it in all the way and slowly adjust it out until maximum RPM is obtained. 1 1/2 to 2 1/2 turns out is average.

If it will kick start with the choke on it sounds like you are very close, just a little fine tuning is needed.

The signal to take the choke off is usually a decrease in idle speed. The bike is telling you that it is warm and now wants a leaner mixture. Your mixture is just a bit too lean right now I think.

If you ride it with the choke off does it backfire on deceleration?

if you need the choke on when its hot then you arent getting enough fuel thru the normal circuits. pull the carb and list the sizes of all the jets, needle, clip position, etc.
turning the idle too high gets you out of the idle circuit. it makes the bike hard to start.
do the above to establish a baseline.
tuts

An additional $10 is applied to each order to cover overseas shipping on orders less than $200
Diag No. Part No. Description Sizes/options available Price Discontinued?
1 8639 Slide 401, 501, 503, 505, 601, 603 & 605
2 8530 Needle K1 to K95
3 8540 Atomizer AB 258, 60, 62, 64, 65, 66, 68, 70, 72, 75, 78, 80, 90 & 300
3 12599 Atomizer DR 266, 268, 270 & 272.
4 9980 Idle emulsion tube Not fitted to all models
5 6413 Main Jet 44, 46 to 330, in steps of 1,2 & 3. Please ask. 11.95
6 1486 Idle jet (short) 30 to 198, in steps of 1,2 & 3. Please ask
6 1486 Idle jet (short) 113, 114, & 123 Y
7 7746 Choke jet 45, 50, 55, 60, 65, 70, 75, 80, 85 & 90
8 7851 Pump jet 30, 33, 35, 38, 40, 42, 45, 48, 50, 55, 60, 65, 70, 75, 90 ,150
9 10375 Float needle valve 150, 170, 200, 225
9 8649 Float needle valve 250, 270, 300, 350, 400
10 7450 Float .1, .2 & .3
11 6429 Top cover screw
12 1581 Spring washer
13 8826 Top paper gasket
14 8542 Screw
15 11779 Slide rod
16 11798 Top casting
17 8726 Spindle seal
18 8727 Spindle seal cover
19 8535 Pump arm pin Metal top
19 10924 Pump arm pin Plastic top
20 9383 Spring
21 11777 Slide rod
22 10451 circlip
23 8941 Throttle lever
24 11773 Needle washer
25 9596 Needle circlip
26 8633 Top cover O ring
27 3718 Washer
28 11776 Slide rod
29 11774 Spring guide
30 11786 External return spring
31 11775 Spring guide
32 11787 Throttle cable support
33 6435 Screw
34 4957 Spring washer
35 11788 Left hand throttle support
36 8825 Dome top cover
37 9042 Allen screw
38 5011 Spring washer
39 8830 Cable arm
40 8725 Spindle seal
41 10069 Slide rod guide
42 7415 Pump arm spring
43 8426 Pump arm
44 3698 90 Degree cable elbow
44 3600 70 Degree cable elbow
44 9330 40 Degree cable elbow
45 1692 Adjuster locknut (for 1481)
46 1481 Cable adjuster
47 1476 Rubber cable cap
48 1104 Cable adjuster
49 1691 Adjuster locknut (for 1104)
50 3128 Choke support
51 3133 Choke return spring
52 3238 Choke piston
53 11650 Long choke body screw
54 8711 Choke body screw
55 8887 Choke housing
56 8888 Choke housing gasket
57 11651 Choke housing spacer (LM)
9619 Choke lever Assy
58 7449 Mixture screw "standard"
58 11084 Mixture screw "Guzzi"
59 9336 Mixture screw spring
60 8260 Mixture screw washer
61 8678 Mixture screw O ring
62 10747 Pump jet holder
63 6426 Pump jet holder fibre washer
64 6173 Pump jet O ring
65 7673 Throttle stop screw
66 4670 Throttle stop screw spring
67 4650 Washer
68 7540 O ring
69 10800 Pump non return valve
70 8556 Pump cover
71 8598 Adjuster screw O ring
72 8599 Pump adjuster locknut
73 8539 Pump adjustment screw
74 8428 Screw
75 7626 Diaphagm spring
76 8555 Pump diaphragm
77 9278 Diaphragm gasket
78 8885 Main jet holder
79 11785 Operating lever, RH
80 11799 Top casting
81 6109 Fuel banjo filter
82 9250 Plastic fuel union
82 6273 Metal fuel union
82 7890 Double fuel union
83 4568 Fuel union bolt
84 8557 Non return valve
85 6288 Needle valve fibre washer
86 7451 Float bowl O ring
87 7346 Float pivot pin
88 10557 Float bowl
89 4057 Float bowl nut seal
90 10238 Float bowl nut, New Style 21mm hex
90 9676 Float bowl nut, Modified style, was 8886 17mm hex
90 8886 Float bowl nut, original style 17mm hex Discontinued: use 9676
90 8551 Float bowl nut 14mm hex
91 52560 PHM N, cranked top
91 52520 PHM A, B, N, V gasket set
91 52544 PHM..H, L, M, P, R, T, S, Z gasket set
91 52545 PHM A, B, N, V gasket set
92 4052 Fuel union seal
93 9573 Short plastic trumpet
94 8673 Long trumpet with wire gauze
95 8128 Clamp nut
96 8127 Clamp bolt
97 8528 Clamp
98 8596 PHM38 R90S mounting sleeve
99 10923 Plastic top
100 8550 Slide spring 0.7kg/70mm
100 8532 Slide spring 1.1kg/70mm
100 9389 Slide spring 1.4kg/70mm
101 8525 Needle clip


#6 is the pilot jet or idle jet as it is referred to here.
The size is stamped right on the jet. You may need a magnifying glass to read the number as it is pretty small.

I got the visual aids here.

check the height of your slide cutaway as well while you are there. underneath the slide it will say 40/3 or 40/1 or even 50/1 etc etc. try to put the slide against the edge of a dinner table and measure the height of the cutaway. if you have a vernier that's great, if not look VERY carefully with a ruler.

the big atomizer (emulsion tube) can be visibly checked for wearing oval. the needle should be rolled to see if bent. also the needle may look 'shot blast' at the tip area.

most importantly-over the years many owners may have bent and buckled the float in the float bowl. the float have to sit evenly and upright on the dinner table. twist to straighten them. next fit it together and check the height when the float closes. this is done with the carb laying on it's face.

you could have read a whole workshop manual and found all this out but the point is; we are helping you go for the obvious stuff and straight to the point.

most of all though you need to get an air jet and blow out every orifice in the reverse direction.

Taffy

The Dellorto is a good carb. Simple but effective. Don't throw the baby out with the bath water.

Good basic carb tuning info