The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: chotus52 on 02.01. 2025 01:48

Title: Cracked crankshaft
Post by: chotus52 on 02.01. 2025 01:48

Hi all, I’m chasing a crankshaft for my 1955 Shooting Star, the short stroke crank. Unfortunately mine is cracked at a big end, hence the need for a replacement. Hoping someone can assist. Regards.

Title: Re: Cracked crankshaft
Post by: muskrat on 02.01. 2025 09:19

G'day chotus52.
Good luck. I snapped two when racing my 1957 A7SS in the 90's.
Might to be easier doing what I did and get an A10 crank/rods (large journal)/barrels & pistons. The A7SS head will take A10 (iron head) valves.
For the life of me I can't find a part number for the crank!
Cheers

Title: Re: Cracked crankshaft
Post by: Swarfcut on 02.01. 2025 09:55

 It's the same crank on all short stroke A7's. 67 384 and 67 385 are listed, originally listed bare in some catalogues or supplied with rods, hence different part number, which also changes with a change in con rod type. Doubtful you will find a new one.....cheap.

 Swarfy.

Title: Re: Cracked crankshaft
Post by: RogerSB on 02.01. 2025 11:06

67-383 for 1955 SS. Hope the pics are legible. (Click to enlarge).
Rog.

Title: Re: Cracked crankshaft
Post by: limeyrob on 02.01. 2025 11:16

I did a quick search on UK e-bay and there are lots from £30 up.  Post will cost but ship it surface and it shouldn't be too bad or get a friend to carry it.
https://www.ebay.co.uk/itm/167221061790?_skw=bsa+a7+crankshaft&itmmeta=01JGKBH6DWE7MP9V1C2QSJRA24&hash=item26ef26e89e:g:iLQAAOSwrF9ncxkd&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKlVxdDpGNt9WTzWnGp8JP%2FBdhbCnb%2F3J%2BcCv5riK8Ypby4NJgBH2KIP1L7FExP%2BDqVOuc%2Bhb9WY%2FzEViBGOoiz7aBA6%2BKZnE1SQnErB%2BZj3VO5nLdrfCa0rFcbrcJ7dSdtq8v0UzhWwjFPZi8RpP7Z3sg9khg1MtTqwsSOystJuNU8hSaCfYJuYaKAL5hGkaTFeZ5agQQ0BnDWovWLZz2hlNGW93V%2FnlFooUUbvlw6%2FjhzeBcHo7LuatPg9L2Rxbdd%2F6f3Q63CK9YUMSaY%2BznVhl%2B6kz9eFepkZpb2%2BgAxn0g%3D%3D%7Ctkp%3ABk9SR4DnxOuEZQ

Title: Re: Cracked crankshaft
Post by: Tomcat on 03.01. 2025 03:48

Try Mike Reilly in Qld or Andy H (member on this forum) in Vic.