Honda Works Development 70 Dirt Track Racer

I am glad someone put a picture of a normal CT70 to compare. Some of the work done to the bike, anyone could do. However, the wheels, swingarm and shock are items that would deter just about anyone, especially on this type of bike. The motor appears to be stock with exception of the intake. No carb was with it so I got a standard run of the mill xr type carb. The vin# on the motor is just a standard H model vin and the frame vin # I belive is somewhat standard ( T70-21) I finished restoring it in August, did a few minor mods to it like new bars, velocity stack, center drilled some of the bolt heads like the old vintage factory Hondas, and painted, zinc, and annodized various items. Just think it is a unique bike that some old school hardcore dirtracker dude might know something about. These are the differences that i know :

1 rear hub - same side brake / sproket it is Honda becaue it has the hm logo cast in
2 front hub - no brake cast into it, its a spool
3 monoshock - it has the old school looking shrouded very short honda shock
4 rear brake arm pivots off of swingarm pivot, not its own
5 exhaust - obviously goes through frame, supertrapp
6 gas tank - in the frame, not plastic insert, MR50 size cap
7 forks - are shorter, appear to be just modified stockers
8 bars - bolt on traditional way, not the hand knob way
9 seat - aluminum hand fabricated pan
10 intake manifold - looks modified from something else
11 foot pegs - very different from stock
12 shifter - weird bend, could be just a modified old style
13 ignition coil - moved from stock location, now up close to seat, long plug wire
14 swingarm - very odd, boxed in around shock mount area and bent to make lower
15 kick start - blanked off with a plug

Honda did support dirt track but I know of nothing in the early 1970s. Hopefully someone can come up with something. As far as origin, I wish I had a great story of getting it from some long lost pro who died or something like that, but I got it from a friend, an old local flattracker from the 70s, who got it from someone who got it from someone etc. They all seem to have the crs disease on this ( cant remember shit ) From what i gather, it was just something that got moved around in everyones shop until I got it and sat on it for a few years and decided to put it together.

thanks, project racer. I am going to try once more to get a better date on this bike. The vin# gives nothing that i have been able to gather. Looks as if I need to be looking in the mid 70s on. You would seem to think that the XR75 would have been the dominant development bike for the individual or factory. Oh well, the saga continues.
thanks to all.