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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
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cam id
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Topic: cam id (Read 1305 times)
andy2565
A's Good Friend
Join Date: May 2010
Posts: 167
Karma: 0
cam id
«
on:
26.05. 2010 18:06 »
i just took a cam out of a spare da10 engine,and it has no numbers anywhere,is it possible to id it by the measurements,overall width of a lobe is 33mm,thickness 24mm,each lobe is slightly raised on one side,
Logged
near wolves uk,will keep riding as long as can stay upright,tribsa,tt500,2xJAP grasstrackers+jawa.gold flash.triumph metisse,and others.
muskrat
Global Moderator
Wise & Enlightened
Join Date: Jul 2009
Posts: 10760
Karma: 130
Lithgow NSW Oz
Re: cam id
«
Reply #1 on:
26.05. 2010 21:06 »
G'day Andy,
I might be wrong, but it looks like a 357. I have a few cams in the shed I will look at tonight.
The best way is to set it up in a lathe with a degree wheel and using a dial gauge work out the timing. 1 degree of the cam = 2 at the crank.
Cheers
Logged
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
dpaddock
NC, USA
Valued Contributor
Join Date: Jul 2006
Posts: 429
Karma: 5
Re: cam id
«
Reply #2 on:
27.05. 2010 07:22 »
DA10 is a GF engine from 1958-on. According to Roy Bacon, the 1958 Flash was fitted with the 67-334 cam and the 1959-63 models had the 67-356 cam.
If you follow Muskrat's good advice, you can compare your measurements with Table 7, p.209, in Bacon's 'BSA Twin Restoration'.
David
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David
'57 Spitfire
andy2565
A's Good Friend
Join Date: May 2010
Posts: 167
Karma: 0
Re: cam id
«
Reply #3 on:
27.05. 2010 08:20 »
i'll buy the book then,ad try and learn how to dial a cam,cheers andy
Logged
near wolves uk,will keep riding as long as can stay upright,tribsa,tt500,2xJAP grasstrackers+jawa.gold flash.triumph metisse,and others.
A10Boy
Wise & Enlightened
Join Date: Jun 2008
Posts: 1078
Karma: 11
Solihull, Near Birmingham England.
Re: cam id
«
Reply #4 on:
27.05. 2010 11:26 »
A very wise investment!!
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Regards
Andy
1958 Super Rocket
Plus
Harley Super Glide Custom
Yam XJR 1300
andy2565
A's Good Friend
Join Date: May 2010
Posts: 167
Karma: 0
Re: cam id
«
Reply #5 on:
14.06. 2010 13:10 »
been to a few dealers and mates,this is different to all standard cams,could be one of the last maybe 358,but could be a one off race cam of a sort,
Logged
near wolves uk,will keep riding as long as can stay upright,tribsa,tt500,2xJAP grasstrackers+jawa.gold flash.triumph metisse,and others.
muskrat
Global Moderator
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Join Date: Jul 2009
Posts: 10760
Karma: 130
Lithgow NSW Oz
Re: cam id
«
Reply #6 on:
14.06. 2010 13:36 »
G'day Andy,
now you've got to dial it up, you might have a piece of treasure.
Cheers
Logged
'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
Australia
Muskys Plunger A7
andy2565
A's Good Friend
Join Date: May 2010
Posts: 167
Karma: 0
Re: cam id
«
Reply #7 on:
14.06. 2010 15:56 »
be a while until i build the engine up,going to get the end feed job,i actually found a 1126 head amongst my bits,having the fins repaired now,as soon as i do i'll let you know.
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near wolves uk,will keep riding as long as can stay upright,tribsa,tt500,2xJAP grasstrackers+jawa.gold flash.triumph metisse,and others.
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The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
»
A7 & A10 Engine
»
cam id