A. Laura M48 Speed Versions (worldwide 1972)
M48-01 40 kph
M48-02 50 kph
M48-03 30 kph CH
M48-04 30 kph DK
M48-04 30 kph S
M48-05 25 kph
M48-08 45 kph
The parts differences are shown in Laura Engines.
Speed sticker
is below seat.
20, 25, or 30
B. Batavus M48 Speed Versions (US models 1976-80)
20 mph 20 mph 25 mph 30 mph ## parts that are different
M48-03 M48-13B M48-01 M48-02
M48-03 M48-13B M48-11B
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485194 485194 485180 485180 #64 crankcase (solid mount, silent, silent)
480695 480695 480695 485695 #65 head (low comp, low comp, normal)
485697 485697 485690 485690 #66 cylinder (restricted, normal, normal)
480894 480894 480880 480880 #71 clutch housing (small pulley, norm, norm)
486795 486795 481790 487190 #72 carburetor (8 mm, 8 mm, 12 mm)
481734 481734 481734 481713 #72 carb air cover cap (14 mm, 14 mm, 16 mm)
481794 481794 481785 481785 #73 intake pipe (small, normal, normal)
480893 480893 480891 480891 #75 drive v-belt (thin long, normal, normal)
481091 481091 481093 481093 #76 front sprocket (11 tooth, 13 tooth, 13)
481506 481506 481505 481505 #77 sprocket nut (small OD, normal, normal)
10-388 10-388 10-342 10-342 #4 engine mount assy (long solid, silent, silent)
16-008 16-098 16-091 16-098 #1 exhaust header (20×585, 22×550, 28×500)
16-090 16-097 16-105 16-097 #20 silencer assy (20 mm, 22 mm, 28 mm)
44-379 44-379 44-404 44-379 #7 rear sprocket (48 tooth, 50 tooth, 48)
45-174 45-174 45-094 45-094 #8 motor chain (88 link, 90 link, 90 link)
Laura M48 versions, left 20mph, right 25 and 30.
The “silent” mount (25 & 30) has rubber cushions.
Conclusions:
To upgrade a 25 mph to 30, you have to change the carburetor assembly, head, sprocket and exhaust.
To upgrade a 20 mph, you have to change the “whole” engine, carburetor, exhaust and sprockets.
The M48-03 (20 mph) version parts are made to not interchange, so you can’t upgrade easily. The clutch hub with smaller front pulley is painted golden yellow and uses a thinner and longer belt, so you can’t put a 30mph clutch hub, painted brick red (the belt would slip because the sides don’t touch).
From a distance you can tell a 30mph version by the extra think 28mm exhaust header.
From a distance you can tell a 20mph version by the yellow clutch and thin long belt.
C. Batavus M56 Speed Versions (US models 1978-80)
20 mph 25 mph 30 mph ## parts that are different
M56-03 M56-01 M56-02
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540681 540681 540695 #6 head
560688 540680 540685 #7 cylinder (8:1, 8:1, 9:1)
561787 561782 561782 116 carburetor (8 mm, 12 mm, 12 mm)
560194 580180 580180 189 crankcase
561096 561097 561097 #38 front sprocket (13 tooth, 17 tooth, 17)
45.065 45.118 45.118 #15 drive chain (96 links, 98 links, 98 links)
16.141 16.141 16.151 #1 ex. silencer assy (478401, 478401, 478550)
16.130 16.130 16.152 #14 ex. header pipe (22 mm, 22 mm, 28 mm)