Manky Monkey Motors

Found this on a certain internet auction site.

Me thinks it looks like a very nice combination of a BSA A10 with XS650 engine.

The asking price was £6,750.

Another view

And another...….

The bike BSA should've built -wasn't the XS motor designed by BSA's own design team?

There appears to a pretty good variety of views as to the origin of the XS650 engine (what’s new there then!)
I once heard of similar one to it being BSA-designed, in that it was offered to BSA who turned it down, prior to it being offered to Yamaha.


Here are a few others from the web

https://www.curbsideclassic.com/blog/sunday-salon-the-yamaha-xs650-originality-is-overrated/

http://www.xs650.com/threads/history.48960/

https://silodrome.com/5-minute-histories-story-yamaha-xs650/

http://www.smedspeed.co.uk/enginerebuild.html



“The truth is out there..............”  ::)

I recall the Kawasaki 650 twin being BSA looking, back when I was young foolish and owned 500 triple kwacker that drank fuel quicker than I could mix it

You are correct regarding the Kawasaki BSA relationship. A Japanese company, Meguro, bought the manufacturing rights to the BSA A7 500. This company was taken over by Kawasaki in about 63 and they continued production for a while. After making some changes to the design, that became the W1.

here is the one I was thinking of, as olds says the W1

Looks like it was re-listed as it sold for £5,900 at the end of January (with 30 bids).