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Author Topic: Cool vintage race bike  (Read 454 times)

Offline guernz

  • Posts: 269
Cool vintage race bike
« on: Jun 06, 2018, 21:29:09 »
Was at Unadilla MX Rewind. The bike was hauling. Wish I took more pics. Thought some or you cats would enjoy.
1977 xlcr
1974 commando
1979 sr 500
a few dirt trackers
a few dirtbikes
all vintage

Offline Brodie

  • DTT SUPPORTER
  • *
  • Posts: 2357
  • Gold Coast, Queensland
Re: Cool vintage race bike
« Reply #1 on: Jun 06, 2018, 21:34:39 »
Jawa speedway engine from what I can tell. Wonder what gearbox they are using.
I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Offline guernz

  • Posts: 269
Re: Cool vintage race bike
« Reply #2 on: Jun 06, 2018, 21:40:32 »
I think it was a old British thing with mods to shift on the left. Very cool bike.
1977 xlcr
1974 commando
1979 sr 500
a few dirt trackers
a few dirtbikes
all vintage

Offline Pete12

  • Posts: 256
Re: Cool vintage race bike
« Reply #3 on: Jun 07, 2018, 02:50:44 »
Likely to be an AMC gearbox Brodie. Standard fitting for a Norton and used on all Japs/Jawas with a gearbox. The right hand shift is a nice touch but the exhaust looks like a lot of work to end up on the same side - must be a reason for that...

Offline Brodie

  • DTT SUPPORTER
  • *
  • Posts: 2357
  • Gold Coast, Queensland
Re: Cool vintage race bike
« Reply #4 on: Jun 09, 2018, 01:44:27 »
Probably tuned length for the pipe.

I was wondering about the top mount section of the box.
I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Offline Pete12

  • Posts: 256
Re: Cool vintage race bike
« Reply #5 on: Jun 09, 2018, 02:30:00 »
Good question, need to see it from the other side. Looks like just some auxiliaries for mounting the pipe, bit hard to tell.

Offline Hoofhearted

  • DTT BOTM WINNER
  • *
  • Posts: 2073
Re: Cool vintage race bike
« Reply #6 on: Jun 09, 2018, 17:15:54 »
It looks like a two valve Jawa.  I don;t think they've gotten around to allowing four valve engines yet.
El Mirage record 500 APS/PG 129.817
El Mirage record 500 SC/PG   122.240
El Mirage record 500 SC/PF    120.157
Bonneville record 500 SC/PG  119.667
Bonneville record 500 SC/PF   117.186
Bonneville record 500 SC/PBG  111.494
Bonneville record 500 SC/PBF   112. 600
Bonneville record 650 SC/PF   128.703
El Mirage  record  650 SC/PG   130.224