Hi - quick back story for my question to make sense. I took apart my BSA C25 in the last 70s early 80s (with the enthusiasm and stupidity of youth). I purchased a number of new parts at the time but it is only now that I have found the time to reassemble the bike (with the encouragement of my grandson).
I had problems with the little end on the original conrod and so I purchased a new conrod in the 1980s. Only now I am looking more closely (and with the wisdom of many years) I see that the part number on the cast iron base is 71-2890. I can't find any reference to this BSA part number. Also, the rods look similar but the new one looks stronger (which is good) but does not have an oil way drilled through to the top shell big end bearing (which might be bad?).
Do I have a replacement C25 conrod that I can use? Can anyone shed any light on this for me? Thank you in anticipation
Kevin
It's hard to find reference to this part number - I wonder if it a casting number instead?
I personally don't have any way of reading .HEIC files. Any chance of providing the pics in .JPG format?
I hope that these photos are OK
Thank you
Kevin
Just reading RR again, the big No-No with this replacement conrod appears to be that it does not have the oil hole drilled for the top bearing shell that effectively makes it unusable. Given the well known problems with B25 conrods, it is advisable to use a replacement with a proven reputation.
Thanks for the response. I have been in email communication with RR (I am buying some bits and bobs from him for the engine rebuild) and he does suggest that it is possible to drill the piston (machine shop drilling and not hand-held Black and Decker) to form a suitable oil way. I am weighing up the cost of this work against selling the perfectly usable connecting rod (as one of a pair for a 500 Triumph) and getting one suitable for the C25,
Thanks again for your willingness to share your knowledge,
Kevin