BSA/Suzuki off-road special

Lord Snooty

Well-known member
UKGSer Subscriber
Joined
Jan 6, 2002
Messages
10,441
Reaction score
625
Location
Redditch, Worcs
Not mine but my brother's project, getting close to completion.

BSA B50 frame, Suzuki GN400 engine, Bultaco wheels, Showa forks, Mikuni carb, Suzuki GSX-R engine mounts, many parts hand made in his workshop such as the chain guard, side panels, bracketry.
 

Attachments

  • 20211120_115403.jpg
    20211120_115403.jpg
    280.4 KB · Views: 361
  • 20211120_115414.jpg
    20211120_115414.jpg
    266.8 KB · Views: 353
  • 20211120_115420.jpg
    20211120_115420.jpg
    266.9 KB · Views: 371
  • 20211120_115424.jpg
    20211120_115424.jpg
    269.1 KB · Views: 358
  • 20211120_115429.jpg
    20211120_115429.jpg
    262.2 KB · Views: 345
More pics
 

Attachments

  • 20211120_115436.jpg
    20211120_115436.jpg
    277.1 KB · Views: 359
  • 20211120_115444.jpg
    20211120_115444.jpg
    253.1 KB · Views: 346
  • 20211120_115507.jpg
    20211120_115507.jpg
    278.8 KB · Views: 348
  • 20211120_115513.jpg
    20211120_115513.jpg
    250.9 KB · Views: 354
  • 20211120_115517.jpg
    20211120_115517.jpg
    266.7 KB · Views: 350
clever bit of work. so would it be a Bsuki or a Subsa. :nenau
 
Looks nice and "blingy".

Why has he put the chain idler roller on the driven and loaded upper chain run rather than on the regular lower run?
 
Fabulous, and you can imagine that this engine is what BSA would have eventually built, given a few more millennia.
 
I think you are right Mark, this type of set up is common on Down Hill mountain bikes. Have a google at the 2022 bikes they take the chain high above the crank sprocket using idler gears.

https://bikerumor.com/aasq-71-high-...encal-deviate-starling-actofive-dispel-myths/

The fixed roller on the BSA/Suzuki does nothing like that though.
I'm just curious as to why it was put there, as all it seems to do is provide the chain with something to chew through.
I could understand a slipper guide to protect the frame crossmember or swinging arm during extreme travel, but not this roller virtually pushing down on the driven run.
 
Seems to me it's only positioned there because it happens to line up with the engine mount. As long as there's no pressure on the chain it'll do no harm where it is :)
 
The fixed roller on the BSA/Suzuki does nothing like that though.
I'm just curious as to why it was put there, as all it seems to do is provide the chain with something to chew through.
I could understand a slipper guide to protect the frame crossmember or swinging arm during extreme travel, but not this roller virtually pushing down on the driven run.

That's a long chain run between the sprockets. My thought was that it would prevent to chain jumping off the front sprocket in extreme conditions. (I.e. Extreme swing arm travel).
 
He's building it to sell, he is not sure whether to fit it with lights.

he has three other projects on the go, a Royal Enfield 250cc, a Yamaha XS11100 (can be seen in the background) and a 1980s Honda XR.
 
Fit lights, will increase the amount of punters who may buy it (IMHO)
 


Back
Top Bottom