Newport L 2hp E50 seems sluggish. C'mon smarty pants...

My 1978 Puch Newport L seems underpowered. It's the 2 hp version, and in comparison, my 2hp ZA50 Newport II has significantly more power and speed. I expect some better acceleration, having two gears, but not this much. My E50 will barely do 25 mph top. It will barely climb the hill to my house at 10 mph, and if I have to stop at the stop sign half way up, forget it. It seems to run well, but I expected more from it stock.

Here's stats

Bone stock E50, 1950 miles. Carb thoroughly soaked clean. Exhaust cleaned with oven cleaner, but it could use another treatment when the weather warms up.

14 mm intake. 16/45 gears. It HAS a head gasket.

Carburetor is genuine Bing. 1/12/316 #64 jet, 2.12 atomizer, needle clip on bottom notch (raising needle highest).

Wiki shows this carb is for a Magnum XK 2hp, does this matter? Is the needle clip position wrong causing it to run rich? Should I eliminate the head gasket?

How can I squeeze a little more out of this, without changing exhaust? I really like how quiet it is.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Richard Eberline /

You can do a upgrade on your current exhaust pipe, its in Wiki. Carb 14mm and match your intake. Use a o-ring on intake side and mesh filter. Check points condition and the gap at .016 and set timing at 17 degrees. Rejet carbEdited 1 time(s). Last edit at 01/26/19 10:09PM by rockettman.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Get a 14mm Bing on there to match the intake, you can find the exact stock jetting setup so it’ll be easy to tune.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Mike Boyd Wrote:

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

> Get a 14mm Bing on there to match the intake, you can find the exact

> stock jetting setup so it’ll be easy to tune.

I've got a 14 mm Bing that I took off one of my Free Spirits that I'm kitting and replacing with a PHBG. That should be a good place to start, eh

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Go ahead and clean the exhaust better right now is what I'd do and put in a NEW spark plug with correct heat range and gap.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Richard Eberline Wrote:

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

> You can do a upgrade on your current exhaust pipe, its in Wiki. Carb

> 14mm and match your intake. Use a o-ring on intake side and mesh filter.

> Check points condition and the gap at .016 and set timing at 17 degrees.

> Rejet carb

Richard, are you referring to derestricting the exhaust? It is already derestricted, but I didn't pull the tube out of the baffle. I sanded and gapped the points first thing. I'll check timing. I've got a 14 mm Bing I'll put on too.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Check that the intake port in the cylinder is 14mm too and not restricted

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Don Ohio Wrote:

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

> Go ahead and clean the exhaust better right now is what I'd do and put

> in a NEW spark plug with correct heat range and gap.

Exhaust isn't bad. A little carbon build up, but I soaked it in oven cleaner for a while and hosed it out. I'll do it again. Plug is brand new B5hs.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Mike Boyd Wrote:

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

> Check that the intake port in the cylinder is 14mm too and not

> restricted

Ah, yes. I will for sure.

Also when identifying the cylinder, Myrons says it will be 7 or 8 cooling fins. Are those the top fins, or side fins? (It has 8 on top and 7 on the side). I'm trying to determine if it's a high torque or low.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Richard Eberline /

I like b7hs plug gaped at .020. Take a compression test, wot and air filter off. Let every sit for about a 1/2 hour. Record number in psi. Do the same test with a shot of WD40. record that number and post it. The 5 plug is way to hot for 9 to 1 compression.

Note: compression should never drop, the psi should remain steady on both tests.Edited 1 time(s). Last edit at 01/27/19 07:38PM by rockettman.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Richard Eberline /

The power is in the points, worn heal and sanding, Will affect your timing. Your timing is the real power. Reducing the gap, affects KV.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Richard Eberline /

Points pitting, are a sign of a weak ext coil/ wire or cap.

I use a zero ohm cap, fresh copper wire and a tested coil for KV.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

sounds like low compression. from myrons page, looks like u count the side fins.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

I really need to buy a compression tester, I know it. I hate cheap Amazon tools when accuracy counts.

I'll put It on the bench tomorrow and pull the flywheel. I need to lube the points anyway. I'll peek at em and re gap them and set timing at 17*btdc with a cig paper. I've got a box of B6hs, but no 7's on hand.

Thanks Pat. I see it now,I was looking at a different page.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Seth B Wrote:

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

> My 1978 Puch Newport L seems underpowered. It's the 2 hp version, and in

> comparison, my 2hp ZA50 Newport II has significantly more power and

> speed. I expect some better acceleration, having two gears, but not this

> much. My E50 will barely do 25 mph top. It will barely climb the hill to

> my house at 10 mph, and if I have to stop at the stop sign half way up,

> forget it. It seems to run well, but I expected more from it stock.

>

> Here's stats

>

> Bone stock E50, 1950 miles. Carb thoroughly soaked clean. Exhaust

> cleaned with oven cleaner, but it could use another treatment when the

> weather warms up.

>

> 14 mm intake. 16/45 gears. It HAS a head gasket.

>

> Carburetor is genuine Bing. 1/12/316 #64 jet, 2.12 atomizer, needle clip

> on bottom notch (raising needle highest).

>

> Wiki shows this carb is for a Magnum XK 2hp, does this matter? Is the

> needle clip position wrong causing it to run rich? Should I eliminate

> the head gasket?

>

> How can I squeeze a little more out of this, without changing exhaust? I

> really like how quiet it is.

Tune the clutch at least and jet to perfection, be one jet or carb setting off and your bike will be a dog

Oh yeah quiet equals slow

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Ken, I get that quiet equals slow, but I'm not looking for fast yet. I just want it running properly stock before trying to get speed out of it. 22-24 mph doesn't seem right for 2hp. But maybe so. This is my first running e50 and it doesn't really compare to my za50.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

It runs a little better. Actually, it seems to run really well. I just expected a tiny bit more stock. It does a solid 25 now. I Changed out the points. The OG's didn't look great. Set gap at .016". Then set timing ~17-18 deg btdc. I put in a brand new B6hs gapped at .020. Exhaust is not restricted. Neither is intake.

I definitely need to do something about the clutch to delay engagement and increase RPM's. I can walk uphill faster. Well not quite.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Seth B Wrote:

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

> Ken, I get that quiet equals slow, but I'm not looking for fast yet. I

> just want it running properly stock before trying to get speed out of

> it. 22-24 mph doesn't seem right for 2hp. But maybe so. This is my first

> running e50 and it doesn't really compare to my za50.

Same bike driving miles away from my house, never let me down for 10 years!

Cost me next to nothin to go 35-40mph all day long (clutch springs, mesh filter)

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Brad William /

Visually check the exhaust port at the cylinder. Do you run good oil? I used to use cheapest oil for mix thinking the better stuff was just marketing hype. A couple of times experiencing inexplicable loss of performance I found the exhaust port narrowed with greasy carbon to about a pencil hole.

Just a possibility.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> Brad William Wrote:

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

> Visually check the exhaust port at the cylinder. Do you run good oil?

> I used to use cheapest oil for mix thinking the better stuff was just

> marketing hype. A couple of times experiencing inexplicable loss of

> performance I found the exhaust port narrowed with greasy carbon to

> about a pencil hole.

>

> Just a possibility.

I did check to make sure it's clear. It was. I run Klotz TechniPlate 40:1.

It's doing much better. I put a 14 Bing carb, and high flow filter. I'm over 30 now, but I still need to upjet a bit more, and fine tune needle settings. Biggest problem was it too restricted with stock air box, and it was too lean without. Just a matter of getting the air fuel perfect, since it didn't have the original head or carb.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

Oh yeah, I changed clutch springs to kickstart springs. Currently 2 turns in from flush. Might be a hair tight yet, but I started at 3 turns. Really helps on the low end and hills.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

John Konstantine /

Info-Puch-Speed-Versions.jpg

Here is Puch e50 2HP checklist for 30Mph version of Puch moped that I use:

- Check stock cylinder version

- Check points/timing/plug

- De-restrict stock Puch exhaust

- 14mm Bing carb with 14mm Intake & rejet

- New low restriction air filter for Puch/bing

Higher air flow Replacement Puch air filter

- Use a thinner Puch head gasket (.4mm thick)

- Check to make sure that you have a 16tooth front sprocket

- etc ....Edited 1 time(s). Last edit at 02/09/19 04:21AM by jkonstantine.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

^^Yep. Got that chart, and did all that. 14 mm carb and intake.Currently upjetted to #68, 2.12a atomizer, single band needle, 24 slide. Metal mesh high flow filter, So close, but Still too lean. 70's jets coming today.

EVERYTHNG else is done/checked/derestricted for 2hp

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

John Konstantine /

This is what I am using on my Pinto e50 Puch 2hp with stock de-restricted exhaust:

Carburetor Bing 1/14 with 14mm intake

Main jet 72

Needle Jet ... 2.17

Needle position 2nd notch from top

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> John Konstantine Wrote:

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

> This is what I am using on my Pinto e50 Puch 2hp with stock

> de-restricted exhaust:

>

> Carburetor Bing 1/14 with 14mm intake

>

> Main jet 72

>

> Needle Jet ... 2.17

>

> Needle position 2nd notch from top

Thanks for that. That gives me an idea where I'll be jetting at. Switching from the 2.22 atomizer to the 2.12a helped a bunch, but I don't have a 2.17 laying around to try.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

John Konstantine /

The Bing 212A Atomizer Seemed to run too rich on my Pinto e50.

Bing 2.17 atomizer Doscycles

List of Puch Bing carb atomizers lean to rich common size atomizers:

-215 (leanest)

-217

-220

-222

-212A (Richest)

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

So far, I've been too lean. Probably why the 2.12a helped. I just got my 70's jets from Dos today, so hopefully a size or two upjet and I'll be there. I'm so close now.

What needle are you running, one band or two?

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

John Konstantine /

Needle position 2nd notch from top.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

> John Konstantine Wrote:

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

> Needle position 2nd notch from top.

Yeah, got that. I'm asking which needle are you running? There are a couple varieties, identified by engraved bands, either one band or two. They are the same length, with different tapers.

Re: Newport L 2hp E50 seems sluggish. C'mon smarty pants...

John Konstantine /

It is too cold here in Michigan to take Pinto moped apart & Bing 14 carb apart in my garage to answer your question right now. I just used the Bing needle that was already in the Bing 14 carb when I bought the Bing 14 used from Motorcycle junk yard off of a Sears Puch Free Spirit moped (e50 Puch Bing 14/14mm intake).

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