triplefan wrote:
Nobody ground down the original numbers, they are clear as day in the right place but there is an additional number next to it pictured you have to look close. This was used as a road racer, I'm sure there is more to the numbers.
After the "H2E", there are 5 digits that follow.
There were only 48,xxx H2's built, so to have a number in the 60,xxx, would indicate either the 1st number was ground down and re-stamped with a "6", or the entire pad was carefully ground down, re-profiled (to have a radius that matches original on the edges) and stamped with all new numbers.
OR, it was a factory set of replacement cases that were stamped with the 60,xxx number.
I've spoken with Tony Nicosia on a number of occasions and have asked him dozens of questions in regards to the history of Denco, and never was a Denco road-race bike mentioned aside from Art Baumann on a CR90-like bike briefly.
I've bought a number of H1 and H2 roadrace bikes over the years and they all had weird crap on them.
See if you can chase down the original bike builder/racer to provide some answers to the numbers. I've had pretty good experiences finding guys from 30-40 years back that originally built a bike I now own.
Can you measure the ports to give a clue as to the "spec" your cylinders are?
Please look close at the image provided, it says H2E 37414. And about a cm infront of that is stamped B947... Like I said it's a numbers matching bike with title... Thanks for your thoughts though, I should probably just call Tony as I own a few rare items that he was involved with and Boots had mentioned he would like to talk to me. I'll try to measure them tomorrow.
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Oh, Cody is correct, the chambers are J&R's and no-one would do any serious racing with such poor pipes, they drop power but allow the engine to rev a LOT higher. 
. . Wisecos Etc didn't have that problem.