Tuesday, November 17, 2009

How To Clean Honda Express Moped Carburetor - nc50 scooter carb clean air filter check oil


Here is a video of how to clean a 1978 Honda Express moped carburetor and air filter. The video give step by step instructions on the best practice of removing, cleaning, and reinstalling the Honda scooter carburetor. You will also find a picture and text step by step of how to clean a Honda Express nc50 carburetor on this website. Check back often for more "How To" videos on many aspects of the Honda Express moped like tips and tricks, performance tuning, top moped speed, honda express manuals, what type of oil to use, and much more.


16 noped comments:

Zach Smith said...

Hi JFK,
Had the same problem with my express. I found that the screw inside the carb that holds down the float was loose. I found a brass m4 fine thread screw to replace the missing one, cleaned it, put the thing back together. I am having one problem though it seems that the fuel mixture is too rich how do i deal with this?

thanks

jfk said...

Zach, thanks for posting the solution to your Honda Express nc 50 carburetor problem! Now, about the fuel mixture too rich. Hummm... what are the signs that have lead to you determining it is too rich? I wonder if something is blocking your oil lines? Perhaps try draining the oil reserve and checking/replacing the nc50 oil rubber tubes. If that didn't work... you could find a replacement oil pump. If you didn't want to spend the money.... I have heard of people mixing the express oil/gas directly in the tank and bypassing the honda moped oil pump all together. I'll post something if I find out more! Thanks for comment.

Huard Family said...

Have a question about my 1978 honda express. It seems to run great on just a little bit of choke. When turn the choke off it completely it dies. I have cleaned the carb 2 times. All the passageways are open. But, does the long tube that runs next to the main jet tube go all the way through and up into the carb? When i put a wire through that it hits something. Is that why it doesn't idle well when the choke is turned off? Thank You

Joel said...

It sounds like "Huard Family's" choke problem may be caused by an unvented gas tank. There is an on-off vent mechanism on the fuel cap that may be malfunctioning.

Nate_W said...

ive got a stock engine with a straight pipe. the carb seems to be cutting out a half throttle and then completely goes at full. but when i bring it back to idle its fine. is this something with the ignition or carb? i tried richening it but it hardly help. could it just be that it overheated?

Nate_W said...

what would cause the engine to cut out at about half throttle but be ok up till then? i have a straight pipe on mine. would that cause it? it has been working completely fine up till now. ive just been driving it more

Nate_W said...

im not exactly sure whats going on but a few days ago the carb wouldnt put any more out after half throttle. it would go normaly up till that point then the engine would cut out and return when the throttle was back under half throttle. any ideas? im trying a 78 carb to see if its the 79 i was using.

jfk said...

@Nate,

Clean out all the carb (even jet) and play with your air/fuel screws on carb. See if that helps.

Nate_W said...

thanks for the help. i ended up just putting the 78 carb back on and it works fine now. sorry for the multiple posts. im new and i didnt know if it was posting or not

Dottie said...

Hello, we just got an old Honda Express running, but it needs work. Any ideas where we can get parts? Also, can you please tell me what the gas cap vent is for. When should I have it open?

Thanks, I am new to this Honda Stuff.

D~

Nate_W said...

bikebandit.com carries a good amount of stuff. especially the hardware end of it. ebay would be the other place thats good. im pretty sure the vent just helps the gas flow well when running or when it's closed helps keep it fresher when it's stored. i just leave mine open most of the time cause i use it often

agus said...

Muy buena pagina que bujia me aconsejan para mi honda expres modelo 1982. Gracias

Matt said...

I just recently bought a 1980 honda express. When i bought it from the guy he had the stock gas tank off because it was all gunked up and rusted inside, he put what looks like to me a lawnmower gas tank on it bypassing the oil pump and going straight to the carb. When i brought the noped home i ran it started right up and drove it for hours, it had some problems with the choke but i thought that was fine for a 1980. the next day i went to take it out to ride and it wouldnt start. ive taken the carb off 2 times and cleaned it and put everything back together in working order. Im at a dead end and i dont know what to do, spark and compression are fine, its just the damn carb, any help? please?

Jon said...

I have a 1978 honda express. It was all locked up and I finally got it running. I have 3 questions.
1. How much do I turn the (2)screws on the carburetor to make it run right? I've tried all sorts of combinations and I really just screwed it up...
2. How much oil and what kind do I put in the transmission case?
3. Is the shaking of my bike from the fact that I do not have oil in the transmission case?

mitch lambord said...

I opened the card on my 1979 Express 2 and I didn't see where and how the "float pin" went... now I don't know where to put it?

JJ said...

Do I clean my 1980 the same way as you did the 78?

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