Friday, April 11, 2014

Steps For NC50 Honda Express 1978 Moped Performance Tuning

The steps For NC50 Honda Express 1978 Moped Performance Tuning are as follows:

  1. Clean and make sure everything stock is in order... then begin. (ie: clean the carb) 
  2. Make sure good new honda nc50 battery
  3. All new oils and gas. 
  4. (supa' cheap start) Honda Moped Muffler Modification 
  5. (got some $$$ then go straight to new pipe) : MLM Muffler Sidebleed Exhaust Pipe from (wait for sale :) 
  6. Upgrade your engine CCs : Honda DR 70cc racing kit from
    You should be around 33mph (at weight 165'ish lbs) 
  7. Premix and remove the honda express stock oil pump
    Note: 1978 nc50 has the oil mixing and going directly into the stock intake. You would need to cap off the stock intake. I have seen some people fill the old oil reservoir with pre-mix as well (run at least 50:1 mix, especially when kitted engine) and use a plastic fuel-rated "Y" connector with the main fuel line and get a little "extra" gasoline storage. 
  8. Replace your reeds with Boyesen Dual Stage Reeds from 
  9. Replace your honda express weak-ends custom nc50 intake 
  10. Upgrade your honda express carb to a Mikuni VM 20mm carburetor
  11. Tune the carb (I'm still working on this one). Get some Mikuni VM 20mm jets : Mikuni main jets from
  12. (be cool and measure metrics on your noped like speed, temp, tach, etc) : Get a TrailTech Vapor

I hope to have a full "How To" video setup in the coming months. So... subscribe to me :)

Wednesday, April 2, 2014

Rear Fender 1978 Honda Express Modification

Rear Fender Honda Express Moped NC50 1978 Modification. For those of you who have decided to upgrade your honda express muffler, but would like to keep your stock rear fender... this post is for you. Simply use a grinder, hacksaw, Drummel with metal disc, or something else equally effective.
Honda Express Fender Modification Closeup
You can see I cut one of the two honda express fender braces (the one on the right-hand side of the moped scooter). Using the stock bolt brace that connects to the air intake and the other rear brace that connects to the drive gear box on the left-hand side of the noped.
Left Side Honda Express NC50 1978 Fender Modification

NC50 Moped Fender Mod Full View

Honda Noped Fender Modification To Fix Upgrade Full View
 I would suggest using a locking washer or "lock tight" on the bolts to keep them from falling out. There will be a lot of vibration without the support that connects to the honda muffler.

Before 1978 Noped Honda Express Stock Fender/Muffler

Happy trails!