The BSA A65 Star was a Birmingham Small Arms Company (BSA) motorcycle aimed at the US market for unit construction twins. As well as giving a clean look to the engine, with the pushrod passages part of the cylinder block casting, unit construction reduced the number of places oil could leak from. [3]

Working with chief development engineer Bert Perrigo, he developed the unit construction Star twins. A range of these 650 cc (40 cu in) Star twins were produced between 1962 and 1972 …

2021年7月14日 · The two engines, the 500cc A50 & the 650cc A65, shared most parts in common, including their stroke, at 74mm. The A65’s bore was 75mm for a displacement of 654cc, and an nearly-square ratio. The A50’s bore was 65.5mm for 499cc. Both came out with single carburetors & alloy heads.

1962 BSA A65 Star specs, performance data, engine specifications, pictures.

2021年7月14日 · The new 1962 BSA A65 in single carb form made 38hp at 5800rpm with a compression ratio of 7.5:1. The engine followed the traditional British vertical twin layout: 360-degree crank (pistons rising & falling together), timing gears on the right, primary drive on the left & it followed BSA tradition by placing the camshaft behind the cylinders ...

These are the known mechanical and performance specifications for your 1962 BSA A65 Star. Basic Specs

The 1965 BSA A65 Star and all other motorcycles made 1894-2025. Specifications. Pictures. Discussions.

New frame, suspension and brakes from 1970 on, coincided with variable build quality! Single carb Thunderbolt’s best buy, good compromise between power, reliability and economy. SRM crank upgrades good news. Lots of Yank imports. Some nice looking but fragile bikes in dealers.

Extensive BSA A65 Star specs, pictures, rating, discussions and reviews.

2021年7月14日 · The 1962 BSA A65 Star was joined in 1963 by a tuned version (higher performance), the A65 Rocket. In 1965, the Rocket sprouted 2 carburetors & became the ’65 BSA A65 Lightning.