Step 1: Determine which series Comet you have if you can. Options are:
- 20 Series - Symmetrical
- 30 Series - Asymmetrical (newest style - includes TAV - most common)
- 340 Series - Symmetrical
- 40/44 Series - Symmetrical
- 500 Series - Symmetrical
Symmetrical units take a v-belt. Asymmetrical units take a belt that is flat on one side with a top width of 3/4".
Step 2: Determine the outside diameter (OD) of your driven clutch. The driven clutch is the one in the rear, not the one on the engine.
Step 3: Determine the center distance (CD) between your drive and drive clutch. Measure from the center of the drive clutch to the center of the driven clutch for this.
Step 4: Determine the top width of your belt.
Step 5: Find your series in the charts below OR go by the specs you have found.
Step 6: Search our site for the part number that fits your specs. If it doesn't come up, please contact us as we do have access to all Comet belts!
20 Series Drive Belts |
20 Drive Clutch with 6" or 7" Driven Clutch |
3/4" Top Width Symmetric, Kevlar, .40" Thick |
Comet Part # |
Comet # Marked On Belt |
6" Dia. C.D. Setting |
7" Dia. C.D. Setting |
Belt O.C. |
203578A |
884-70 |
6-15/16" to 7" |
27.36 |
203579A |
884-75 |
7-1/8" to 7-3/16" |
6-1/4" to 6-5/16" |
28.32 |
203580A |
884-80 |
7-9/16" to 7-5/8" |
6-13/16" to 6-7/8" |
29.28 |
203581A |
884-85 |
8-3/16" to 8-1/4" |
7-5/16" to 7-3/8" |
30.25 |
203582A |
884-90 |
8-11/16" to 8-3/4" |
7-3/4" to 7-13/16" |
31.23 |
203583A |
884-95 |
9-3/16" to 9-1/4" |
8-5/16" to 8-3/8" |
32.20 |
203584A |
884-100 |
9-5/8" to 9-11/16" |
8-3/4" to 8-13/16" |
33.18 |
203585A |
884-105 |
9-15/16" to 10" |
9-3/16" to 9-1/4" |
33.78 |
203586A |
884-110 |
10-3/4" to 10-13/16" |
9-13/16" to 9-7/8" |
35.14 |
203587A |
884-120 |
11-11/16" to 11-3/4" |
10-15/16" to 11" |
37.11 |
203588A |
884-130 |
13-1/16" to 13-1/8" |
12-1/8" to 12-3/16" |
39.77 |
30 Series Drive Belts |
30 Drive Clutch with 6" or 7" Driven Clutch |
3/4" Top Width 20-1/2 deg Asymmetrical Kevlar |
Comet Part # |
Comet # Marked On Belt |
6" Dia. Driven C.D. Setting |
7" Dia. Driven C.D. Setting |
Belt O.C. |
203589A |
6-5/8" to 6-11/16" |
No fit |
27.03 |
217248A |
6-15/16" to 7" |
No fit |
27.36 |
203590A |
994-75 |
7-1/8" to 7-3/16" |
6-1/4" to 6-5/16" |
28.32 |
203591A |
994-80 |
7-9/16" to 7-5/8" |
6-13/16" to 6-7/8" |
29.28 |
203592A |
994-85 |
8-3/16" to 8-1/4" |
7-5/16" to 7-3/8" |
30.25 |
203593A |
994-90 |
8-11/16" to 8-3/4" |
7-3/4" to 7-13/16" |
31.23 |
203594A |
994-95 |
9-3/16" to 9-1/4" |
8-5/16" to 8-3/8" |
32.20 |
203595A |
994-100 |
9-5/8" to 9-11/16" |
8-3/4" to 8-13/16" |
33.18 |
203596A |
994-105 |
9-15/16" to 10" |
9-3/16" to 9-1/4" |
33.78 |
203597A |
994-110 |
10-3/4" to 10-13/16" |
9-13/16" to 9-7/8" |
35.14 |
203598A |
994-120 |
11-11/16" to 11-3/4" |
10-3/4" to 10-15/16" |
37.11 |
203599A |
994-130 |
13-1/16" to 13-1/8" |
12-1/8" to 12-3/16" |
39.77 |
340 Series Drive Belts |
Comet Part # |
C.D. Setting |
Belt O.C. |
203578A |
6-15/16" to 7" |
27.36 |
203579A |
7-1/8" to 7-3/16" |
28.32 |
203580A |
7-9/16" to 7-5/8" |
29.28 |
203581A |
8-3/16" to 8-1/4" |
30.25 |
203582A |
8-11/16" to 8-3/4" |
31.23 |
203583A |
9-3/16" to 9-1/4" |
32.20 |
203584A |
9-5/8" to 9-11/16" |
33.18 |
203585A |
9-15/16" to 10" |
33.78 |
203586A |
10-3/4" to 10-13/16" |
35.14 |
203587A |
11-11/16" to 11-3/4" |
37.11 |
203588A |
13-1/16" to 13-1/8" |
39.77 |
40/44 Series Drive Belts |
40 Drive Clutch with 40 or 44 Driven Clutch |
7/8" Top Width, Kevlar, .45" Thick |
Comet Part # |
Comet # Marked On Belt |
40 C.D. Setting |
44 C.D. Setting |
Belt O.C. |
203783A |
40-75 |
7-1/4" |
31.95 |
203784A |
40-80 |
7-7/8" |
32.90 |
203785A |
40-85 |
8-3/16" |
33.87 |
203786A |
40-90 |
8-5/8" |
7-5/8" |
34.83 |
203787A |
40-95 |
9-3/8" |
8-3/16" |
35.80 |
203788A |
40-100 |
9-3/4" |
8-11/16" |
36.78 |
203792A |
40-105 |
10-1/4" |
9-3/16" |
37.75 |
203789A |
40-110 |
10-1/2" |
9-5/8" |
38.65 |
203790A |
40-120 |
11-1/2" |
10-9/16" |
40.50 |
203791A |
40-130 |
12-5/8" |
11-11/16" |
42.66 |
204331A |
40-140 |
13-3/4" |
12-5/8" |
44.53 |
213295A |
44-75 |
14-11/32" |
13-13/32" |
45.38 |
213165A |
44-85 |
15-3/16" |
14-7/32" |
47.50 |
500 Drive Clutch with 500 or 858 Driven Clutch |
Comet Belt Part # |
500 Driven C.D. Setting |
858 Driven C.D. Setting |
Belt O.C. |
300619A |
7" |
- |
30.40 |
300620A |
8" |
- |
32.29 |
300621A |
8-1/2" |
7-1/2" |
33.24 |
300622A |
9-1/2" |
8-1/2" |
35.16 |
300623A |
10-1/4" |
9-1/4" |
300668A |
15" |
14" |
45.91 |
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