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Difference between -59R pushrods & standard pushrods?

PostPosted: Thu Mar 31, 2022 4:06 am
by Simon
Hi everyone, just curious as to the difference between the 17904-59R pushrods and the standard street-going bikes? Were the pre-1960 street pushrods steel or something like that? Did street bikes from 1960 or so onwards start to use the aluminium pushrods, obsoleting the -59R part number?
I have a set of the -59R pushrods (and see a set that have been on ebay for ages) that I'll use on my 61 XLR project, but the set of 1961 pushrods and aluminium covers I just bought look identical - not that I have them in front of me yet to directly compare.

Re: Difference between -59R pushrods & standard pushrods?

PostPosted: Sun Apr 03, 2022 11:44 pm
by Simon
And an answer from Leo: "Physically identical, only difference is weight, 50g Vs 68g for stock." Neat!