My PA50 is a lost cause

Ok, I've had this thing for a year, working on it off and on and I CANNOT figure out what the hell is wrong with it. The engine doesn't seem to be running at full RPM. The timing is perfect, there are no air leaks around the engine, and I just put a new base gasket on it. I can only get up to around 20km/h. KM/H!! The compression is good too, a little over 120. Has anyone ever had a similar problem? Could it be something mechanical, like the variator or the rear pulley? I know the engine isn't reving as high as it should. I really don't know what it could be. Any help on this would be much appreciated.

Thanks.

Re: My PA50 is a lost cause

throttle cable stuff, carb problems with the throttle?

Re: My PA50 is a lost cause

sorry i cant help, but whatever you do dont give up because i just got my 1980 pa50 II running and I LOVE IT!!! Its a great moped, very fast acceleration and a great smooth comforetable ride : ) It also gets me up hills with no problem.

Re: My PA50 is a lost cause

How many miles on your PA50? Have you try running it with the muffler off? Could be a clogged muffler,

How about the air filter on the left side of the bike bewteen the belt, It is a slide out tray. It has a sponge rubber type filter that disintegrates with age. It should be replaced with a simialr porus type sponge rubber and soak it 30 wt oil and the excess squeezed out.

Also if the filter has crumbled away make sure it hasn't stopped up the plastic airflow unit in back of the carb.

Is the float bowl on correctly? It is an easy mistake to put it on backwards which causes the float to be block from it full rang e of upward movement. You should be able to see the drain screw by looking in the right side frame slot.

If your bike has high mileage, it could also be the reed valve although it is rare for these to go bad.

Re: My PA50 is a lost cause

By the way, i bought a shop manual for this moped and gave it to someone at mopedriders.org, you can go there and view it for free on their website in the moped repair section : ) this will help A LOT!

Re: My PA50 is a lost cause

Dan Beeson /

I thought that manual was from itslookingup.com? Well, I bought a new set of points for the second time...lets see how it goes from there. Does anyone know if the variator could be a problem? Has anyone ever had this particular problem before? By the way Zippy, thanks for that info on my Puch MS50...gladly appreciated.

Re: My PA50 is a lost cause

hahahahahha PA50!!! my friend has a '79 thats basically falling apart/being torn apart by what we do to it (jumping speed bumps, off roading, skids/wheelies. crashes, and running it into cars) we also have a nick name for it

GRAAANNNNNDDDDD PAAAAAWWW its etched into his gas tank

Re: My PA50 is a lost cause

Dan Beeson /

Ok then, any one else?

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