Contents: 1. Cogged Belts 2: V-Belts
1. Cogged Belts
These are also called timing belts and synchronous belts, because like a chain, they cannot slip. There are not many mopeds or mini-cycles with cogged (toothed) belts.
type T10, 10mm trapezoidal
type T5 profile
5mm trapezoidal
type S5M profile
5mm high torque
type 5M profile
5mm rounded teeth
610-5M-18
Besides different lengths and widths there are also different pitches and profiles (tooth shapes). So there are thousands of possible cogged belts. The belt length is the tooth count times the pitch. So a 610-5M belt has 610/5 = 122 teeth.
Di Blasi: The 1997-on DiBlasi R7E has a cogged drive belt 18mm wide, and has 122 teeth that repeat every 5mm (5mm pitch). One replacement that is shorter is 600-5M-18, with 120 teeth. It fits and meshes correctly, but only when the adjustment slots are lengthened. Here is a 600-5M-18 in New Jersey. A 610-5M-18 with 122 teeth is the original size. Here is a 610-5M-18 in New Jersey.
390-5M-20 & 390-T5-20
Laura M56: This engine from Holland is on 1978-80 Batavus and 1982-85 Trac mopeds. The original belt was 20mm wide, and specially made for that engine. It had 79 teeth that repeat every 5mm (5mm pitch). Very similar belts are black rubber Bestorq 400-5M-20 and 395-5M-20. But the 5M style teeth do not mesh right. Another replacement belt clear-gold colored (polyurethane) is Mectrol T5x390 (T5/390). It is 20mm wide 78 teeth (1 less than original). The T5 style belt teeth mesh well with the pulley, but the one-tooth-shorter length requires the large pulley be shaved down, to about 2/3 of the original pulley tooth height. Here is a 20T5/390 (too short) and a 20T5/400 (too long) both in New Jersey. A 20T5/395 with 79 teeth is the original size. Here is a 20T5/395 (395-T5-20) in China.
Jawa 210 and 225: The 1983-1995 Jawa 210 and 225 moped models have a cogged belt 25mm wide, and has 51 teeth type T10, that repeat every 10mm (10mm pitch). A 25T10/510 with 51 teeth is the original size. Here is a 25T10/510 (510-T10-25) in New Jersey.
2. V-Belts
Table of Moped V-Belts
| Moped Maker Models or Types | Orig. no. or Price | Width x Height x Outer Length | Inch Number | Metric Number | Belt Manufacturer Markings or Notes |
| Angel or Speed Bird (non variator) | original | 15.0 x10.0 x 907mm 0.51" x 0.39" x 35.7" | Sanwu (Taiwan) 895 3013 | ||
| original $15 | 15.0 x10.0 x 907mm 0.51" x 0.39" x 35.7" | Sanwu (Taiwan) 895 3013 | |||
| Batavus VA, HS50, Starflite (non variator M48 25,30mph) | original 480891 | 13.0 x 10.0 x 820mm 0.51" x 0.39" x 32.3" | Laura (Holland) 480891 A | ||
| substitute $21 | 13.0 x 10.0 x 820mm 0.51" x 0.39" x 32.3" | XL-9319 | Gates (automotive) | ||
| substitute N/A | 13.5 x 8.7 x 826mm 17/32" x 11/32" x 32.5" | 17320 (32017) | 13A0815 | generic (automotive) 32017 13A0815 | |
| Batavus VA, HS50, Starflite (non variator M48 20mph) | original 480893 | Laura (Holland) 480893 | |||
| substitute N/A | |||||
| Derbi Variant SL, SLE, TT Var. Sport, DS50 (variator) | original 82 26 370 | 17.6 x 8.5 x 630mm 0.69" x 0.33" x 24.8" | Derbi (Spain) Variant 82.26.37.0 | ||
| original $18 | 17.6 x 8.5 x 630mm 0.69" x 0.33" x 24.8" | Derbi (Spain) Variant 82.26.37.0 | |||
| Honda PA50 Hobbit/Camino (variator) | original 23100... | 15.0 x 9.0 x1085mm 0.59" x 0.35" x 42.7" | B type | Mitsuboshi (Japan) 23100-148-7030 | |
| substitute N/A substitute N/A | 13.5 x 8.7 x1080mm 17/32" x 11/32" x 42.5" 12.7 x 7.9 x1067mm 1/2" x 5/16" x 42.0" | 17420 (42017) A40 AX40 | 13A1065 | Gates (automotive) Gates (industrial) | |
| Honda NU50 Urban Express (variator) | original 23100... | Mitsuboshi (Japan) | |||
| substitute $18 (B31) | 16.3 x10.3 x 864mm 21/32" x 13/32" x 34.0" | B31 BX31 | Gates (industrial) | ||
| Motobecane 7, 40, 50, 50V and 1957-64 Wards Riverside (variator and non-variator) | original 14756 | 14.0 x 9.0 x 830mm 0.55" x 0.35" x 32.7" | Optibelt (Germany) 172 115 MB 112 030 | ||
| substitute N/A (B31) substitute N/A substitute $20 substitute $18 | 16.3 x10.3 x 864mm 21/32" x 13/32" x 34.0" 13.5 x 8.7 x 826mm 17/32" x 11/32" x 32.5" 14.0 x 7.9 x 828mm 0.55 x 0.31 x 32.6 12.7 x 7.9 x 813mm 1/2" x 5/16" x 32.0" | B31 BX31 17320 (32017) AX30 | 13A0815 D24 | Gates (industrial) generic (automotive) slips a little Ventico (France) Gates (industrial) | |
| Peugeot 103 models (variator) | original 48815 | 13.0 x 8.5 x 870mm 0.51" x 0.33" x 34.3" | 5497 | Hutchinson 5497 Peugeot N°11 048815 | |
| substitute $18 substitute $20 | 13.5 x 8.7 x 877mm 17/32" x 11/32" x 34.5" 12.7 x 7.9 x 864mm 1/2" x 5/16" x 34.0" | 17340 (34017) A32 AX32 | 13A0865 | generic (automotive) 34017 13A0865 Gates (industrial) | |
| Peugeot 103 (non variator) | original 48987 | 9.5 x 8.5 x 845mm 0.38" x 0.33" x 33.3" | 5379 | Hutchinson 5379 Peug. N°11 048 98700 | |
| substitute $12 | 9.5 x 9.0 x 845mm 0.38" x 0.35" x 33.3" | D 255 | Ventico (France) D 255 | ||
| Peugeot 101, 102 (non variator) | original 46068 $12 | 9.5 x 8.0 x 735mm 0.38" x 0.31" x 28.9" | 5378 | Hutchinson 5378 Peug. N°11 046 06800 | |
| substitute N/A substitute $14 | 9.5 x 8.3 x 737mm 3/8" x 21/64" x 29.0" 9.5 x 8.0 x 740?mm 0.39" x 0.31" x 29.1? | 3V290 3VX290 | D 213 | Gates (industrial) Ventico (France) D 213 | |
| Solo Odyssey (non variator 1 or 2 sp) | original 00 57 176 | 10.0 x 6.0 x 730mm 0.39" x 0.24" x 28.7" | Optibelt (Germany) Solo 00 57 176 | ||
| original $18 substitute N/A | 10.0 x 6.0 x 730mm 0.39" x 0.24" x 28.7" 9.5 x 8.3 x 725mm 3/8" x 21/64" x 28.5" | 3V285 3VX285 | Optibelt (Germany) Solo 00 57 176 Gates (industrial) | ||
| Vespa Ciao C7N, C7E (non variator) | original $18 102905 | 9.7 x 9.0 x 970mm 0.38" x 0.35" x 38.2" | Pirelli (Italy) 2931-102905/9 | ||
| original rear pulley 94mm smaller pulley 75-80mm smaller pulley 65-70mm | substitute $15 | 11.9 x 7.9 x 978mm 15/32" x 5/16" x 38.5" 9.5 x 9.0 x 960mm 0.38" x 0.35" x 37.8" 9.5 x 9.0 x 940mm 0.38" x 0.35" x 37.0" 9.5 x 9.0 x 925mm 0.38" x 0.35" x 36.4" | 15380 (38015) | 11A0965 11AV0965 10A0960C 10AV0960C 10A0940C 10AV0940C 10A0925C 10AV0925C | Gates (automotive) Dayco (automotive) Dayco (automotive) Dayco (automotive) |
| Vespa Ciao C7V (variator) | original $15 102906 | 13.0 x 7.0 x 975mm 0.51" x 0.28" x 38.3" | Pirelli (Italy) 2632-102906/9 | ||
| substitute N/A | 12.7 x 7.9 x 965mm 1/2" x 5/16" x 38.0" | A36 AX36 | Gates (industrial) | ||
| Vespa Bravo, Grande (variator) | original 130937 | 13.0 x 7.0x1050mm 0.51" x 0.28" x 41.3" | Pirelli (Italy) | ||
| substitute N/A substitute $15 substitute $10 | 12.7 x 7.9x1041mm° 1/2" x 5/16" x 41.0" 12.7 x 7.9x1041mm 1/2" x 5/16" x 41.0" 11.9 x 7.9x1042mm 15/32" x 5/16" x 41.0" | 2410 (4L410) A39 AX39 15405 (40515) | 11AV1030 | Gates (industrial) Gates (industrial) generic (auto) slips a little | |
| Vespa Si, Boxer (non variator) | original 124593 | 9.5 x 9.0? x 1143?mm 0.38" x ???? x ???? | Pirelli (Italy) | ||
| substitute N/A | 9.5 x 1140/1150 0.38" x ???? x ???? | ||||
| Vespa Si, Boxer (variator) | original 122192 | 13.0 x 7.0x1143?mm 0.51" x 0.28" x ???? | Pirelli (Italy) | ||
| substitute N/A | 12.7 x 7.9x1092mm 1/2" x 5/16" x 43.0" | 2430 (4L430) | Gates (industrial) | ||
| Vespa (unknown) (non variator) | unknown $15 | 9.7 x 8.5 x1050mm 0.38" x 0.33" x 41.4" | TD? 5332 | ||
V-Belts Explained
The smooth sides of V-belts are what grips the pulley. The harder the pull, the more it grips, because of the V angle. The top and bottom do not touch anything.
First is a graphic showing the cross-sectional shapes and sizes of replacement V-belts that can be used on mopeds and small scooters. V-belts for variators (variable pulleys) are the “low profile” type, called “variable speed belts”. V-belts for fixed pulleys are the “high profile” type, called either “classic” or “cogged”, see below.
V-belts are made by Gates in different styles, widths, and lengths. Here the width choices from 9.5 to 17.5 mm. Larger or smaller sizes are omitted.
9.5 mm 3L, 3V, 3VX
10.0 mm 10X, SPZ, XPZ
11.9 mm automotive 15
12.7 mm 4L, A, AX
13.0 mm 13X, SPA, XPA
13.5 mm automotive 17
15.9 mm 5V, 5VX
16.0 mm SPB, XPB
16.7 mm 5L, B, BX
17.0 mm 17X
17.5 mm automotive 22
Smooth or Notched: The notches, or cogs, on V-belts are not teeth, like on toothed belts. They are relief slots that help the belt bend easier, for less friction and more efficiency. Equipment that originally had smooth belts can use cogged belts, and visa versa.
Batavus/Laura M48 20mph v-belt: So far there is only a part number and a photo, but no width, length or belt number available. It’s size can only be estimated from this photo. If anyone knows, please tell Shaun by email.
More about V-belts:
http://www.smex.net.au/reference/Vbelts02.php
Batavus/Trac/Laura M56 toothed belt: The only mopeds with a toothed drive belt are the 1978-80 Batavus Regency, wit Laura M56 engine, … continued later …