Bike of the Month - June 2004
|In December 1974 I purchased my first MR-50 for my 6 year old son to ride. I thought, what a great bike, it has gears, a clutch, spoke wheels and everything just like a real dirt bike. He became an accomplished rider in about 6 months and wanted to race some of the other kids on their MR's and other mini bikes.
When we retired from the racing circuit in 1977 my son was 9 years old. I sold the bike to another dad who raced it in California and Nevada and did quite well. The only problem was he never paid for the bike. In 1983, by chance, I ran into him and got the bike back, which was then in boxes and painted red. I put it back together and kept it in storage until 2003. It now has been completely rebuilt, up graded and returned to its original 1974 orange color.
Photos taken at NASA facility in Houston, TX April 2004
Reproduction rubber parts for your Honda MR50 can be found here.
Specifications & Modifications
|Front forks (air)||4.8" travel||Swing arm||6.2" travel|
|Ground Clearance||7.0"||Dry Weight||92 lbs.|
|Compression Ratio||7.3:1||Max h.p.||9.6BHP/7000 RPM|
|Clutch Springs||RM 80 h.d.||Rear Spokes||8 gauge|
|Rear Sprocket||47 T||Ignition||Mototek CDI|
|Frame||Pwdr Coated Dupont RAL||Frame front tube||4130 Chrome molly|
|Handle Bars||7/8" dia||Grips||Pro Grips|
|Handle Bar Mounts||Honda XR75||Chain Tensioner||Pro Tec CT-19|
|Carburetor||Keihin 22mm||Displacement||52 cc|
|Kickstand||Quick remove style||Swing arm||DG 1975|
|Head||DG Radial 1975||Exhaust||Aluminum Down pipe|
|Rear shocks||12-1/2" lay down||Rear Springs||Progressive|
|Engine||Heat coated||Throttle||1/4 quick turn|
|Chain||RK 420 gold||Kicker||swing out|
|Triple Tree||Aluminum||Air Filter||1-1/2" Uni|
|Side covers||Hand formed f.g.||Intake manifold||modified|
|Engine||Matched & hand flowed||Tank decal||Gold reflective|
|Spark Plug||NGK B8HCS||Final Ratio||3.92|