Do you have one of these charts for the M51's???
Found 1 for the 348's on http://www.montesaweb.com/secciones/EVO ... px?id=c348
Technical evolution of the model:
DATE N FRAME MODIFIED ELEMENTS
51M 0000 First mass-produced Cota 348
3132 Change in box filters, anti-water is added deflactora screen.
3699 Chain protector step on forwarding engine crankcase Change odometer is added.
3790 Change elements of the carburetor
4722 New front fenders
5059 3rd sprocket on the secondary shaft speed from 15 to 16 teeth, to shorten development
5099 The bottom flange of the suspension changes. to open a passage for cables
5707 Improved softness gearshift freewheel and sliding is amended
6828 Support guide chain with diam. the holes for fixing the ducts reducidos.Los spacers are fixed. The aim is to avoid wear on the
7200 New dampers susp. rear "Telesco hydrobag" improved front suspension gas, achieving a more progressive braking the spring strut the New protective controls tension brake and clutch Eccentric chain with smaller step is changed and
10107 New rubber grips on the handlebar
11307 New Black New fastening system gears and roller rocker arm, which ensures the positioning of the same new shifters and rear brake New rigid optic headlight New flywheel New front suspension with air pressure tank decorated with golden line protective arm and suspension
12305 Cushions susp. Rear modified