Thanks, Steve. Yes, I like the total package very much, and I knew it would be a "labor of love". Based on the seller's description, I was hoping for more originality. By "seven spring" you mean the number of exposed coils?
Regarding the mufflers, I think I've read here that the LR's were different from the HM300's because they had less internal restriction, a different baffle, and no brake pedal indent. But I haven't yet come across why they were called LR's?
I can post more pics and I'll read the areas you suggested. Thanks
Yes, 7 exposed springs.
the term lotus root is non-american. years ago, i uploaded pics of original lotus root baffles and mufflers, took detailed measurements of mufflers, etc, stc, these pics are all in the website; this was very shortly before yamiya reproduced the lr exhaust because i remember stewing over the fact i only had 3 lr's and the 4th was a "no.no" exhaust, this was during the time i was trying to make 232 correct. i would encourage anyone who has more than a passing or greedy interest in things sandcast to explore the website, there is a TON of info in the website many people don't bother to explore, because they are interested in a quick answer, or a quick sale, e.g.,
https://www.facebook.com/search/top/?q=cb750%20k0%20sandcast%20and%20diecast as far as i know, Yamiya coined the term when they produced and made available the lr's during 2006. at that time, i asked the folks at yamiya, "why lr?" they said the removable baffle is shaped like a lotus root. the lotus flower is a highly sacred symbol, any quick google search will give you info -
https://www.lotusflowermeaning.net/the lr exhaust have no internal baffling except one plate to hold the baffle in place, and no stamping, i.e, "HM300". the second version of the exhaust fitted to sandcast is what the Japanese refer to as the "no.no" exhaust, the muff's have internal baffling as well as the removable baffle which is different from lr baffle, asd for that matter, the lr muff's are different from the "no.no" muff's. common knowledge for anyone having more than passing interest in sandcast CB750's, knows lr's were fitted to vin's E1-E3149. "no.no" exhaust were fitted to vin's E3150-E7414, and have no stamping, i.e., no HM300.
A question for our good friend Gerard of France - What type of exhaust are fitted to the "French Sandcast" bikes?