This bike has been build up out of an Honda NS-1, there has been a replicated NR 750(oval piston) fairing on it and it has got seat-pipes just like the NR 750.
I can't remember who send me this bike, but I do remember that it's been build up out of a Honda MT and a Suzuki TS, and has MB-5 wheels.
If you know the owner or are the owner please email me with more details.
Honda NSR
This is a Dutch 50cc racer, it's been build out of a Honda RS 125 frame, swingarm, tank and fairing, NSR 50 (AC08) wheels, the brake I think is from an Honda CBR 600,
the engine comes from an Honda NSR 50 (AC08), it's got a Keihin 20mm carburetor, the engine has been under massive tuning, the speed of this type of racer is about 160 km/h and has about 15HP.