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How to identify your JAWA

Engine

623-1 250 ccm, 2 cylinder, oil pump, holds for "spinal" frame, year 1969 - 73, used for JAWA 623 BIZON
623-2 same as 623-1, but without oil pump
633-0 350 ccm, 2 cylinder, holds for "spinal" frame, year 1968 - 73, used for JAWA 633 BIZON
633-1 same as 633-0, but used oil pump
633-3 350 ccm, 2 cylinder, used for JAWA 634, connection rod pins on "needle bearings" diameter 16mm, (first few pieces with 18mm), reverse gear (1 down), canceled semi-automatic clutch release, but renew again later
633-4 same as 633-3, but 84dB for CSSR for JAWA 634
633-5 same as 633-4, with oil pump MOTORPAL
633-6 same as 633-5, 84 dB for JAWA 634
633-7 for sidecar (changed chain sprocket and tachometer drive)
633-8 for Austria, 352 ccm, for JAWA 634
633-9 84 dB, sidecar, JAWA 634
623-4 250 ccm, 2 cylinder, used for CZ 471
623-5 same as 623-4, but separated lubrication
623-6 same as 623-4, but 75W generator
634-1 350ccm, 2 cylinder, same as 633, but holder for frame CZ, used in CZ 472
634-2 same as 634-1, oil pump
634-3 same as 634-1, model for Ministry of Defence
634-5 same as 634-1, model for Soviet Union
634-6 same as 634-1, 84dB, CSSR
634-7 same as 634-1, sidecar
634-8 same as 634-1, for CZ 472.04 ( 1978 )
634-9 same as 634-1, for Austria
631-0 separated lubrication, mechanical speedometer
631-1 same as 631-0, 84 dB, JAWA 634
631-2 same as 631-0, sidecar, England, JAWA 634
631-3 model 1980, mechanical speedometer, JAWA 634
631-4 same as 631-0, sidecar, JAWA 634
631-5 same as 631-4, oil pump, JAWA 634
631-6 for Austria, 352 ccm, mechanical speedometer, for JAWA 634
631-9 mechanical speedometer, reduced noise, JAWA 634
632-00 updated  engine 633, JAWA 634
632-001 same as 632-000, sidecar, 15 teeth sprocket, JAWA 634
632-013 engine for Egypt producer, 60 W generator
632-2 engine derived from 632-0, used alternator 12v from 638. Used in CZ 472.6 and JAWA 632-0 (1988-90). In 1991 were produced limited series for JAWA 634 frame for English customer.
Produced variations:
00 - for CZ 472.6
01 - same as 00 with modernise gearbox
02 - for JAWA 632-0
03 - 2 x FAG bearings on crank shaft, cast-iron shifting forks
04 - same as 03, for sidecar
05 - all bearings FAG on crank shaft, cast-iron shifting forks
06 - same as 05 for sidecar

By Pete Edwards

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