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cooperess
PostPosted: Fri Sep 08, 2017 8:20 am 
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I would like to know how to identify Cooper 'S' pushrods from Mini pushrods or are they all the same?
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Mick
PostPosted: Fri Sep 08, 2017 8:26 am 
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It is not hard to spot once you know. The 1275 pushrods are a different length to 850/998/1100 pushrods in that the 1275 pushrods are a 1/4 inch longer.

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cooperess
PostPosted: Fri Sep 08, 2017 8:31 am 
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Mick wrote:
It is not hard to spot once you know. The 1275 pushrods are a different length to 850/998/1100 pushrods in that the 1275 pushrods are a 1/4 inch longer.
Thanks Mick. Is there any difference in the stem thickness?
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Mick
PostPosted: Fri Sep 08, 2017 9:07 am 
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They have always appeared to me to be identical except for length.

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cooperess
PostPosted: Fri Sep 08, 2017 9:22 am 
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Attachment:
Mini Pushrods 002.jpg
Attachment:
Mini Pushrods 001.jpg
I think I have tagged the pictures correctly. Please tell me if I am wrong.


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Mick
PostPosted: Fri Sep 08, 2017 9:45 am 
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Yes that would be correct.

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Phil 850
PostPosted: Fri Sep 08, 2017 8:58 pm 
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So, are all 1275 push rods the same shape at the ends as the cooper S.
in other words, there not Cooper S push rods but 1275 push rods ?

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drmini in aust
PostPosted: Fri Sep 08, 2017 9:42 pm 
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I will check my 1275 stock tomorrow.

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Lillee
PostPosted: Fri Sep 08, 2017 10:56 pm 
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Phil 850 wrote:
So, are all 1275 push rods the same shape at the ends as the cooper S.
in other words, there not Cooper S push rods but 1275 push rods ?


I have "1275" pushrods with triangular ends like the bottom one in the above photo. So yes, there are 1275 non S ones.

but they bent after <1000 miles but that's another story...

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drmini in aust
PostPosted: Sat Sep 09, 2017 9:09 am 
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I have 1-1/2 sets of original 1275 non- S pushrods, all look the same as the S ones in above pic. NOT triangular.

After Chong's problem above with new UK ones bending I would consider sourcing competition ones from APT in USA. Expensive but worth it, IMO.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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cooperess
PostPosted: Sat Sep 09, 2017 9:52 am 
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Mick wrote:
Yes that would be correct.
Thanks Mick
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Ian McNeil
PostPosted: Sun Sep 10, 2017 2:46 pm 
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