Puch e50 Polini won't start

Hi all, I just rebuilt an e50 with a polini kit, 19mm, CDI set to 16 degrees BTDC, Proma circuit setup. the bike was running before I tore it down but it had a cylinder stud issue that forced me to replace the bottom half of the case so while I had it apart I put in new seals and bearings and case matched to the kit a little better than what the PO had done. I cut the top cylinder skirt off the polini kit to mate the case to the 3rd transfers better too. So I get it all back together and on the bike. I rewired the harness to clean up the routing and put the wiring connections into the area where the stock airbox is (that big hole in the side).

SO I have great spark, Compression is showing 170, and it seems to be getting fuel (wet plug, I cleaned the carb 3 times) but it will not even pop to try to start. just dead.

any suggestions on what I should be looking for other than what I already have? I was thinking maybe trying to lower the compression a little by adding head gaskets, or checking that the pipe isn't clogged, but this was a running bike before (about 6 months of sitting) can't imagine the pipe is clogged but I'm going to check later anyway.

Re: Puch e50 Polini won't start

> Brent Bhuiyan Wrote:

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

> Hi all, I just rebuilt an e50 with a polini kit, 19mm, CDI set to 16

> degrees BTDC, Proma circuit setup. the bike was running before I tore

> it down but it had a cylinder stud issue that forced me to replace the

> bottom half of the case so while I had it apart I put in new seals and

> bearings and case matched to the kit a little better than what the PO

> had done. I cut the top cylinder skirt off the polini kit to mate the

> case to the 3rd transfers better too. So I get it all back together and

> on the bike. I rewired the harness to clean up the routing and put the

> wiring connections into the area where the stock airbox is (that big

> hole in the side).

>

> SO I have great spark, Compression is showing 170, and it seems to be

> getting fuel (wet plug, I cleaned the carb 3 times) but it will not even

> pop to try to start. just dead.

>

> any suggestions on what I should be looking for other than what I

> already have? I was thinking maybe trying to lower the compression a

> little by adding head gaskets, or checking that the pipe isn't clogged,

> but this was a running bike before (about 6 months of sitting) can't

> imagine the pipe is clogged but I'm going to check later anyway.

If you have another coil you can try, try another coil. I hadn't seen a coil cause issues until last year I saw 2 Puchs both with the same symptoms: good spark, good fuel, good compression, but lo and behold once we replaced the coil the thing would actually run. I think both coils that failed (while still showing spark against the head, weirdest thing) were the stock Bosch coils

Re: Puch e50 Polini won't start

Timed with a timing light?

Re: Puch e50 Polini won't start

timed with a timing light. there was issues with that though I think the timing light might have been off... it was alternating from showing TDC and BDC but the timing at TDC was right. I'm at the point of prolly switching this thing back to points because the CDI has been such a headache. I'm gonna try swapping the coil with a known to be good one. It has one of the hi rpm box /12v combo coils form the treats adventure pack

Re: Puch e50 Polini won't start

Overpriced Parts /

CDI means stuck on the side of the road!

Re: Puch e50 Polini won't start

funny thing is it does spark twice, totally normal. Double check the simple stuff, maybe some fresh fuel, plugged exhaust, squirt some in the plug hole to make sure, grounds, plug wire, fouled plug, but my main guess is timing, try a few different spots cuz if your not getting a pop then its way off.

Re: Puch e50 Polini won't start

The pietcard 2041 in the adventure pack doesn’t play well with timing lights. Mine was doing the same thing yours is. I’ve talked to at least 2 others with the same issue. I ended up timing it by ear and feel it’s probably a bit off but I don’t care, I never see over 378° and it’s hitting 55 pretty quick. You may be 180° out on the timing. Although I haven’t tried it yet, I read somewhere on here that it actually works right if you put the lead for the timing light on the hot wire coming into the Cdi box, instead of the spark plug lead.

The 2041 also doesn’t like the treats internal coil, it puts too much power into them. Some people have had issues with them burning up. Less with the pietcard 3055 or another coil they’re designed for.

Re: Puch e50 Polini won't start

I had a problem with using the 2013 box and a timing light. As soon as you rev it the light goes crazy and no longer times anything. But the idle gives a steady light to time from. The timing ended up being accurate it was just weird how it stopped working accurately.

Re: Puch e50 Polini won't start

> Jay Rivett Wrote:

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

> I had a problem with using the 2013 box and a timing light. As soon as

> you rev it the light goes crazy and no longer times anything. But the

> idle gives a steady light to time from. The timing ended up being

> accurate it was just weird how it stopped working accurately.

Sounds like you weren't using a resistor plug or boot. If you don't use a resistor plug/boot electronics go apeshit anywhere close to the bike while it's running

Re: Puch e50 Polini won't start

> Nick MBC Wrote:

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

> > Jay Rivett Wrote:

>

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

>

> > I had a problem with using the 2013 box and a timing light. As soon

> as

>

> > you rev it the light goes crazy and no longer times anything. But the

>

> > idle gives a steady light to time from. The timing ended up being

>

> > accurate it was just weird how it stopped working accurately.

>

> Sounds like you weren't using a resistor plug or boot. If you don't use

> a resistor plug/boot electronics go apeshit anywhere close to the bike

> while it's running

I had the same issue with a resistor plug with a regular boot and resistor boot with regular plug. The pietcards just hate timing lights. It’s probably because of the cheapy electirics they’re built with.

Re: Puch e50 Polini won't start

Yeah I usually have the appropriate combo for my boot/plug but I totally ge that could make the same thing happen. The idle timing is always spot on, just when you raise the rpms over 5k it starts getting wacko.

Re: Puch e50 Polini won't start

> Jay Rivett Wrote:

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

> I had a problem with using the 2013 box and a timing light. As soon as

> you rev it the light goes crazy and no longer times anything. But the

> idle gives a steady light to time from. The timing ended up being

> accurate it was just weird how it stopped working accurately.

I have the treats adventure pack and I have been having trouble timing it for months now. My puch runs but the timing is way off at about 2.5mm btdc and if I move the stator even the slightest left or right it doesn’t run and detonates. How do I change the timing to closer to what it needs to be? Or is my Pietcard trash? I’ve been messing with it for months now

Re: Puch e50 Polini won't start

You have the 2013 box? Doesnt the treat kits come with the 2041?

Treats cdi are notorious for the pickups being bad or going bad. Also they make the same thing for both clockwise and counterclockwise rotations the only difference being which side the pickup is on. Make sure you have the correct one for your engine rotation. You can reposition the pickup for your specific engine. And replace it with a better one if your is indeed bad.

Re: Puch e50 Polini won't start

Tweaker trash /

> Overpriced Parts Wrote:

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

> CDI means stuck on the side of the road!

U obviously never owned a hpi

Re: Puch e50 Polini won't start

I think I have been stuck on the side of the road from points more times than because of a cdi crapping out.

Re: Puch e50 Polini won't start

Tweaker trash /

> Jay Rivett Wrote:

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

> I think I have been stuck on the side of the road from points more times

> than because of a cdi crapping out.

Haha yup

Kens never been over 8,000 rpms

Re: Puch e50 Polini won't start

Tweaker trash /

Overpriced Parts Wrote:

-------------------------------------------------------

> In reply to

> https://www.mopedarmy.com/forums/read.php?6,4450606,4451177#msg-4451177

>

> Tweaker trash Wrote:

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

> > > Overpriced Parts Wrote:

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

> > > CDI means stuck on the side of the road!

> >

> > U obviously never owned a hpi

>

> Obviously you’re a dumski

> I had three HPI’s but an HPI is not a junk cdi which of the several I

> I had or set up all end up taking a dive within a day or two or three

> weeks!

> HPI is only for racing anyway as soon as you put a Mag cover to keep the

> rain and snow they burn up

> I get bikes that are running longer than you are alive! with points

> ignition so go away

Dude chill out.. Iv had the same temp gauge for 5 years and the same hpi with all the original parts on my maxi for four years and it never let me down! And I’m a beginner...

Ur not kidding anyone

Re: Puch e50 Polini won't start

♣Slew Foot♣ /

I've seized one moped kit in 5 years no temp gauge.

Cdi is great but if you wanna red line points is the bongdiggity....

Re: Puch e50 Polini won't start

> Brent Bhuiyan Wrote:

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

>the bike was running before I tore

> it down but it had a cylinder stud issue that forced me to replace the

> bottom half of the case so while I had it apart I put in new seals and

> bearings and case matched to the kit a little better than what the PO

> had done.

FYI E50 case halves are mated in such a way that you should replace both with a matching number set rather than replace just one half. Maybe not the main issue causing problems, but could be affecting things.

Re: Puch e50 Polini won't start

Tweaker trash /

> Chris Straub Wrote:

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

> > Brent Bhuiyan Wrote:

>

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

>

> >the bike was running before I tore

>

> > it down but it had a cylinder stud issue that forced me to replace the

>

> > bottom half of the case so while I had it apart I put in new seals and

>

> > bearings and case matched to the kit a little better than what the PO

>

> > had done.

>

> FYI E50 case halves are mated in such a way that you should replace both

> with a matching number set rather than replace just one half. Maybe not

> the main issue causing problems, but could be affecting things.

Yea

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