Not too far off topic...

grandpaul

grandpaul

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  • Not too far off topic...
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Interesting bike. I thought the XS was a 180° crank, which is not supposed to work so well with the isolasitics because of the large rocking couple. But this one is nicely done, and apparently works well too. Maybe he converted it to a 360 :lol:

Didn't Norton experiment with an XS650 engine in a Commando frame just before they folded? I seem to recall something like that in one of the many Norton books.

Ken
 
Fullauto said:
650 Yams are 360 degree cranks. What a waste of a Norton frame.
Click to expand...

So it is. Don't know why I thought it was 180. So it probably shakes a lot less than a stock XS650.

Ken
 
lcrken said:
Interesting bike. I thought the XS was a 180° crank, which is not supposed to work so well with the isolasitics because of the large rocking couple. But this one is nicely done, and apparently works well too. Maybe he converted it to a 360 :lol:

Didn't Norton experiment with an XS650 engine in a Commando frame just before they folded? I seem to recall something like that in one of the many Norton books.

Ken
Click to expand...

I think Norton built some frames for Yamaha, first for the HL 500 motocrosser then for the XS 750 shaft-drive triple.
 
Shoot I like Nortons and Yamaha's, so I'm all for it :D, It's certainly unique & it's out on the track competing :wink:
 
There was also this one with the other one I posted, (and a BSA chopper); each bike had over 20# of red Oklahoma dirt covering everything, as they had all experienced excessive oil leaks (gee, I wonder why?)

Not too far off topic...


Although it was rough, it at least retained the isolastics...
 
That Yamando with all the neat bits appears well do. I really like it.
The XS650 mill is a nice unit, and never seemed to get its due respect when in production.

Back in the 70's it was all about choppers.
Everything on 2 wheels got the chopped treatment.
Thank goodness, that period is over.

Please, no more mutilated Norton choppers.
Let then all rest in peace. :(
 
lcrken said:
Interesting bike. I thought the XS was a 180° crank, which is not supposed to work so well with the isolasitics because of the large rocking couple. But this one is nicely done, and apparently works well too. Maybe he converted it to a 360 :lol:

Didn't Norton experiment with an XS650 engine in a Commando frame just before they folded? I seem to recall something like that in one of the many Norton books.

Ken
Click to expand...
No they were all 360 cranks although some people re phase them to 270 , wasn't it Phil Irving who advocated a 270 degree firing order ? Nice looking bike but I could really use that chassis right now!! Cheers
 
baz said:
lcrken said:
Interesting bike. I thought the XS was a 180° crank, which is not supposed to work so well with the isolasitics because of the large rocking couple. But this one is nicely done, and apparently works well too. Maybe he converted it to a 360 :lol:

Didn't Norton experiment with an XS650 engine in a Commando frame just before they folded? I seem to recall something like that in one of the many Norton books.

Ken
Click to expand...
No they were all 360 cranks although some people re phase them to 270 , wasn't it Phil Irving who advocated a 270 degree firing order ? Nice looking bike but I could really use that chassis right now!! Cheers
Click to expand...

I think the firing order was still 1, 2.
 
Maybe L.A.B. or Jerry can move this thread to the "general motorcycle discussion" section...
 

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