Technical Library
- (Bulletin #198) Engine - Various innovations on singles and twins (English language) (published 1963) (760.5 KB)
- (Bulletin #208) Engine - Centrifugal advance unit of two-cylinder models (English language) (published 1964) (98.5 KB)
- (Bulletin #212) Suspension - Lubrication of the front wheel-swinging arm bearing (English language) (published 1964) (236.3 KB)
- (Bulletin #213) Frame - Special Equipment sidestand on two-cylinder models (English language) (published 1964) (97.7 KB)
- (Bulletin #214) Engine - Strange engine and transmission noises (English language) (published 1964) (491.2 KB)
- (Bulletin #216) Engine - Improved sealing between engine and cylinder flange (English language) (published 1965) (108.9 KB)
- (Bulletin #217) Engine - Cover plate for front crankshaft main bearing (English language) (published 1965) (128.0 KB)
- (Bulletin #219) Suspension - Solo-type suspension units on the two-cylinder models (English language) (published 1965) (231.1 KB)
- (Bulletin #223) Engine - Rocker push rod (English language) (published 1965) (138.7 KB)
- (Bulletin #238) Engine - Crankshaft bearing (English language) (published 1966) (78.7 KB)
- (Bulletin #246) Engine - New breather (English language) (published 1967) (98.9 KB)
- (Bulletin #250) Engine - Tachometer (rev.- counter) (English language) (published 1967) (411.6 KB)
- (Bulletin #257) Engine - Air filter and carburetors supplement 1 (English language) (published 1967) (330.8 KB)
- (Bulletin #260) Transmission - Floating bushings for first and fourth speed gears (English language) (published 1967) (57.9 KB)
- (Bulletin #261) Wheels - Road behaviour of twin cylinder models (English language) (published 1967) (56.8 KB)
- (Bulletin #264) Engine - Wet air filter in engine housing (English language) (published 1967) (58.1 KB)
- (Bulletin #243) Wheels - Admission of tyres (English language) (published 1968) (55.6 KB)
- (Bulletin #257) Engine - Air filter and carburetor supplement 2 (English language) (published 1968) (69.9 KB)
- (Bulletin #268) Transmission - Facilitation of gear shifting on models R50, R60, R69S (English language) (published 1968) (542.3 KB)
- (Bulletin #269) Engine - Cylinder head (English language) (published 1969) (325.3 KB)
- (Bulletin #275) Transmission - Detent of speed gears (English language) (published 1970) (240.1 KB)