Are these XS1B Forks ? I'm confused

[Grewth]

I got these with a pile of supposedly XS1 and XS1B parts that I picked up.
The guy who sold them to me is adamant that he stripped them from a XS1B, but the mudguard (fender) stay lugs integral to the bottom forging have got me thinking they might be from something else entirely.
My only reference point at the moment is my Brooklands Books road test compilation.
The XS1B on the front cover seems to have the lugs on the fork lowers.
But the XS1B that Cycle Guide tested in March 1971 doesn't have the lugs.
1970 XS1 models with the gaitored type forks don't have the lugs in any of the pictures.
So have I got a genuine set of Yamaha forks or are they from a Suzuki or whatever ?

 

[Jim]

The guy who sold them to me is adamant that he stripped them from a XS1B, but the mudguard (fender) stay lugs integral to the bottom forging have got me thinking they might be from something else entirely.

'71 (XS-1B) had both front fenders. Was probably a mid year change since the XS-2 also had the lower stays. I'd guess they are XS-1B parts.

 

[Jim]

From the Tech ID thread....

 

[Jim]

 

[Grewth]

Thanks very much Jim !
Someone was trying to convince me that they were from a Suzuki T250 Hustler !
I found this on the forum somewhere

 

[Grewth]

I'm not too familiar with these forks, but I'm assuming that their relative rarity means that I can't just buy a new pair of tubes like you can for a 650 Special.
So maybe I can get the old tubes ground and hard chromed.
In my experience you end up with better tubes than the cheap pattern replacements (better than OE too)