Panther Model 75

Panther Model 75

telescopic forks. Wheels were 26" x 3.25" front and rear initially with 6" half width hubs and later optional alloy hubs were offered."The Panther Story" by Barry M Jones, Panther Publishing Ltd.]

Development

This model was largely a development of the Model 70.

* 1948 - Production of the new 1949 model commenced in October

* 1949 - The Model 75 was launched as a rigid.

* 1950

* 1951 - 6.5" Rear brake replaces 6" unit. Stroud MkII version introduced

* 1952 - Colour scheme change

* 1953 - A swinging arm version was launched featuring new P&M telescopic forks.

* 1954 - Dowty forks replaced by P&M forks. Rigid model last manufactured. Improved swinging arm rear frame introduced.

* 1955 - New alloy wheel hubs introduced

* 1956 - 3.25 gallon tank replaces 3 gallon tank, Amal monobloc introduced, colour change

* 1957 - Dualseat became standard

* 1958

* 1959

* 1960

* 1961

* 1962 - Swinging-arm version last manufactured. End of the line for 350&nbspcc four stroke lightweights.

Technical Information

Engine Numbers

Engine Numbers are of the following format [Panther Page Tech Specs http://www.pantherownersclub.com/PantherPage/p-ts-eng.html ] yyKxxxz where:
* yy stands for the year of manufacture (add 40 if it is a single digit),
* K is the definitive code for a Model 75. Other letters may follow the K:
** KS swinging arm
** KX Stroud
** KA alloy head
* xxx stands for the serial number, and
* z stands for the modification code.

Detailed Technical Specifications

From "Modern Motorcycle Maintenance" ["Modern Motorcycle Maintenance" by Bernal Osborne of Motor Cycling, Second Edition]

;Tappet Clearance (cold)::Inlet, nil.:Exhaust, nil.

;Valve Timing::Inlet opens before T.D.C., 10 degrees.:Inlet closes after B.D.C., 45 degrees.:Exhaust opens before B.D.C., 65 degrees.:Exhaust closes after T.D.C., 15 degrees.

;Tappet Clearances for Valve Settings (hot)::Inlet, nil.:Exhaust, nil.

;Ignition Advance::35 degrees full advance.

;Valve Guides Protrude from Cylinder Head::Inlet, .875 in.:Exhaust, .875 in.

;Cylinder Bore in Inches::2.7955 ins.:Rebore to plus .010 in. when bore exceeds 2.8005 ins.

;Piston Clearances::Top land, .0131 in. to .014 in.:Top skirt, .005 in.;Bottom skirt, .0043in.

;Piston Rings::End gap, .011 in. to .016 in.:Vertical play, .001 in. and .002 in. on scraper.

;Main Bearings::Driving side: 1 in. bore plain journals.:Timing side: 1 in. bore plain journals.

;Mainshaft::End float, .030 in.

;Big-end/Connecting-rod::Side play, .016 in. to .034 in.

;Big-end Bearing::Type: Hardened steel, double roller.:Recondition when noisy.

;Gearbox::Bearings, types and sizes: ::40mm by 17mm by 12mm.::62mm by 1 9/32 ins. by 16mm. (ball races).:Bushes, reamed to: .8475 in.+.001 in.; .6215 in.+.001 in.; .312 in.+.001 in.; .811 in.+.001 in.; .670 in.+.001 in.; .499 in.+.001 in.;.914 in.+.001 in.

;Fine-limit Diameters::Connecting-rod: Little end, .750 in. + .001 in. / -.0000 in.:Camshaft bushes, .. .5625 in.+ .000 in. / -.0005 in.:: and .625 in. + .000 in. / -.0005 in.:Idler wheels .. .. .5625 in.+ .001 in. / -.0000 in.:Tappet guides .. .. .250 in.+ .001 in. / -.0000 in.:Cam-followers .. .. .5625 in.- .001 in.

;Left-hand Threads::Nil.

;Special Tools Available from Makers for Comprehensive Overhaul::Dowty fork key.:Valve spring remover.:Engine sprocket remover.:Main pinion extractor.:Clutch spanner.:Crankpin and engine shaft nut spanner.:Tappet stud extractor.:Ball race fitting tool.:Dynamo pinion extractor.:Exhaust nut spanner.

Carburettor Settings

ources

External links

* [http://www.pantherownersclub.com/PantherPage/p-m-4slw.html Four Stroke Lightweights at The Panther Page]


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