NC50 maximum RPM?

How many R's can a stock NC50 turn safely?

Re: NC50 maximum RPM?

Is this a real question? If you have to ask you shouldnt try it.

Re: NC50 maximum RPM?

Thanks for the very informative answer Daniel. I can't tell you how helpful you have been. Thanks again!

Re: NC50 maximum RPM?

The real question is, is it even possible to get one spinning that fast? (edited)

Re: NC50 maximum RPM?

Hey live ɘvil, thanks again for helping me get it running. Had it spinning over 8000 just to see if it would.

Re: NC50 maximum RPM?

> Doug Kuhn Wrote:

> -------------------------------------------------------

> Hey live ɘvil, thanks again for helping me get it running. Had it

> spinning over 8000 just to see if it would.

With what? A drill?

Re: NC50 maximum RPM?

> live ɘvil Wrote:

> -------------------------------------------------------

> > Doug Kuhn Wrote:

>

> > -------------------------------------------------------

>

> > Hey live ɘvil, thanks again for helping me get it running. Had it

>

> > spinning over 8000 just to see if it would.

>

> With what? A drill?

LOL

Re: NC50 maximum RPM?

Stock it is rated to 5400 or 6400 rpm, depends on the version you have, Camino-PA50 speed parts are available so you can boost the speed or get more torque with a kit.

Old but maybe useful link (both are blogs so no asshole answerbacks to your quest) http://expresslymopeds.50megs.com/

http://www.hondaexpressmoped.com/2009/

Re: NC50 maximum RPM?

> Rebel Moby Wrote:

> -------------------------------------------------------

> Stock it is rated to 5400 or 6400 rpm, depends on the version you have,

> Camino-PA50 speed parts are available so you can boost the speed or get

> more torque with a kit.

>

> Old but maybe useful link (both are blogs so no asshole answerbacks to

> your quest)http://expresslymopeds.50megs.com/

>

> http://www.hondaexpressmoped.com/2009/

An NC50 has a final drive gear box. Good luck regearing that. Just think, anything but an express could be regeared relatively easy. No room for larger wheels either.

Re: NC50 maximum RPM?

Thanks Rebel Moby that's the answer I was looking for. I just wondered what max rpm honda recommended, I couldn't find it in the service manual or owners manual. Mine doesn't seen to mind running 5500-6000, but when I ran it up to about 8200 that was obviously too much. So I'm guessing I could run it at around 5500 for longer periods of time without doing serious damage (hopefully). Smartasses don't bother me I'm too old for that LOL. Thanks again.

Re: NC50 maximum RPM?

053ad54c3eec0466fad8519a2d89a1dcc6da3a-v5.jpg

Re: NC50 maximum RPM?

I am very satisfied with the performance of this little toy. The only thing I would like to improve is a little more low end torque without losing top end speed.. Stock motor with new standard bore rings (cylinder & piston looked really good). Completely gutted muffler, and chinese clone Z50 carb. Any ideas.

PTDC0012 (3)_LI.jpg

Re: NC50 maximum RPM?

Jack Rutherford /

13,000 has to be close to limit . you could increase compression to boost low end. (edited)

Re: NC50 maximum RPM?

Hey Jack, that's an idea. Thanks. On another note.....did drilling out the idle jet on the chinese clone carb help the idle?

Re: NC50 maximum RPM?

I can think of one way to find max RPM but you might not like it.

Re: NC50 maximum RPM?

Jack Rutherford /

> Doug Kuhn Wrote:

> -------------------------------------------------------

> Hey Jack, that's an idea. Thanks. On another note.....did drilling out

> the idle jet on the chinese clone carb help the idle?

are you having trouble starting and/or idling?

Re: NC50 maximum RPM?

When it is cold it takes 3 or 4 tries with choke full on to start. When it's warn it starts right up. I'm trying to get the idle set at 1800 but if I set it anywhere below 2300 it will slowly idle down until it dies. It idles fine at 2300.

Re: NC50 maximum RPM?

Like many bikes, probably get away with a mild port job, plug in a 15mm carb and intake, some goodly mild pipe... that will wake it up a bit and add a bit more smiles.

Re: NC50 maximum RPM?

Jack Rutherford /

> Doug Kuhn Wrote:

> -------------------------------------------------------

> When it is cold it takes 3 or 4 tries with choke full on to start. When

> it's warn it starts right up. I'm trying to get the idle set at 1800 but

> if I set it anywhere below 2300 it will slowly idle down until it dies.

> It idles fine at 2300.

where is your idle screw set - how many turns out?

Re: NC50 maximum RPM?

I have tried it everywhere. I have probably adjusted 100's of carbs, this one just doesn't act right. If I start at 1 1/2 turns out and slowly screw it in, at some point it should falter. It doesn't do anything until I get all the way down to the last 1/4 turn then it speeds up. If I start at 1 1/2 turns out and unscrew it at some point it should falter, it doesn't. I can unscrew it all the way and it doesn't make any difference. It runs great on top end and it will set there and idle at 2300. But if I try to idle it down to 1800, it will, but it wont set there and idle at 1800 the idle just keeps getting slower and slower until it eventually dies.

Re: NC50 maximum RPM?

Jack Rutherford /

open up the idle jet a little. it's the long brass cylinder next to main jet

Re: NC50 maximum RPM?

That's what I'm going to try. I just don't have a drill bit small enough right now. Turn the idle/air screw doesn't do anything until I turn it all the way in. Of course, then it dies. Plug is a nice chocolate brown after a semi hard run. So I think the main jet is very close. Do you know what main jet these come with? I don't see any numbers on it. Thanks for the help.

Re: NC50 maximum RPM?

ive had my NC50 to 50 mph before, using the RPM information you provided (approx 2123rpm = 1mph) 10,650rpm. I can tell you it doesnt last very long at that RPM.

Re: NC50 maximum RPM?

Jack Rutherford /

Yeah, the dude's website abruptly ends with no further updates.

Re: NC50 maximum RPM?

> Jack Rutherford Wrote:

> -------------------------------------------------------

> Yeah, the dude's website abruptly ends with no further updates.

Huh?

Re: NC50 maximum RPM?

> live ɘvil Wrote:

> -------------------------------------------------------

> > Rebel Moby Wrote:

>

> > -------------------------------------------------------

>

> > Stock it is rated to 5400 or 6400 rpm, depends on the version you

> have,

>

> > Camino-PA50 speed parts are available so you can boost the speed or

> get

>

> > more torque with a kit.

>

> >

>

> > Old but maybe useful link (both are blogs so no asshole answerbacks to

>

> > your quest)http://expresslymopeds.50megs.com/

>

> >

>

> > http://www.hondaexpressmoped.com/2009/

>

> An NC50 has a final drive gear box. Good luck regearing that. Just

> think, anything but an express could be regeared relatively easy. No

> room for larger wheels either.

I have 16” mags on my Express build. Going to run these 2” tires

C7628AE1-CAE4-4EA3-81AC-CD441046B73B.jpeg
7874C0E5-2E46-4879-8790-39C5BA038922.jpeg
1E239C7C-59F2-4642-8BE0-1D8F099E96ED.jpeg

It Just fits.

Re: NC50 maximum RPM?

> Doug Kuhn Wrote:

> -------------------------------------------------------

> > Jack Rutherford Wrote:

>

> > -------------------------------------------------------

>

> > Yeah, the dude's website abruptly ends with no further updates.

>

> Huh?

Only 5hrs. later and I finally get it. LOL

Re: NC50 maximum RPM?

3BCDF66D-810A-458B-97F5-F39FF24894D8.jpeg

U can see the stud ends, welded to a steel plate cut in a circle and drilled to fit puch mag bolt pattern.

Trimmed the NC hub around the spokes to fit into the mag center.

B8BEA0FB-D525-428F-A75C-D515F41D22B9.jpeg

Welded 5 coupler nuts around the NC to bolt the rim on like a car. I shaved the heads and welded it for a smooth look. The plate is 3/16” and welded around the center too. It’s a 1978 NC50 Express with the tiny output axle. If u have the larger axle, an urban Express wheel laced up to 16” wheels and a good bicycle tire, moped tube. 20x2.0 tires, they hold about 95psi to keep from bottom out or ejection seat wooOoklunk

D363F578-B0A2-4FA9-9A87-FD1C72B0A81F.jpeg
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