classic motorcycle forum

Motorcycle Discussions => Japanese Bikes => Topic started by: colinb on April 14, 2009, 02:38:16 AM

Title: can you  identify this bike? please help
Post by: colinb on April 14, 2009, 02:38:16 AM

Could anyone identify this bike

Title: Re: can you  identify this bike? please help
Post by: hocko on April 14, 2009, 11:46:05 PM

Possibly an early Bridgestone 125 twin, late 60's. Are there any identifiers on the frame or engine?

Cheers

Title: Re: can you  identify this bike? please help
Post by: L.A.B. on April 15, 2009, 12:19:38 AM

Quote

Possibly an early Bridgestone 125 twin, late 60's. Are there any identifiers on the frame or engine?

I think we've already identified it (a Yamaha YAS1, although it would help if people didn't post the same message in different sections).

http://www.vintagebike.co.uk/cgi-bin/yabb2/YaBB.pl?num=1239674325

Title: Re: can you  identify this bike? please help
Post by: BarryBiker on May 03, 2009, 06:01:53 AM

That's a Yamaha YAS1 125cc twin.  It could also be a Yamaha YCS1 which is the 180cc twin, they look alike.  Near the exhaust port will say what cc,s the engine is for both cylinders. Can't be a Bridgestone because it doesn't have rotary valves.                                    

Quote

Possibly an early Bridgestone 125 twin, late 60's. Are there any identifiers on the frame or engine?

Cheers