MOPED ARMY

Hi, Cap!

Larger carb?

It's the stock 14.12 carb, and I forgot to say I added the Minarelli air box.

Jets are on my list to try, but it should be able to move up a hill without coming to a dead stop in a stock state, no?

Other thoughts?

Peace.

Hi, PF!

I'm a total noob, so "like a total dog" is a bit vague for me.

Smily runs smoothly and responsively above 10 mph on flat. Slow off the mark and unable to go up hill without a long speed up to it.

Dog?

The air leak is very slight. Can I do anything temporary at the carb out to seal it up for a test? The damned o-ring isn't here today .

What does the condenser do in the process? Would a bad one cause a problem at low revs vs high?

Thanks a ton!!

Peace.

Hi, Steve!

Thanks for the insights! Would changing the oil ratio from the OEM spec be risky? What would the benefits be? What should I watch out for?

Peace.

Two stroke oil is alot better than it was, alot of old bikes were calling for high oil mixes but 32:1 for a cast iron cylinder or 50:1 for an aluminum cylinder is about right using conventional nonsynthetic. There are many posts on the subject.

If the condenser is original, it must be bad. You can search for how to mount an external condenser. Replacing the spark plug is the first thing to do because its the cheapest and easiest maintenance item to take care of.

You can use a little bit of Hondabond sealant to seal the carb flange if it is the round vlamping type but you would want to do a leak down test first to find any possible engine air leaks. You can search here how to do it but basically you plug the exhaust port and pressurize the carb port with about 5 psi and look for a pressure drop on the gauge. Brushing on some soapy water will reveal the leaks on tne outside of the engine, but if not found, the crank seals are the usual leak source.

fix your airleak first. Then upjet.

53 jet is smallest Dellorto jet I own. Nothing can run well on that. Go up in jets, then test taking the plugs out of your airbox, if applicable. Check point gap and timing.

I had a stock Demm like yours that went 35. It wasn't too sluggish and could slowly climb a hill.

Change the title of thread to : "Smily Can't Make Demm Hills". Sorry P J- couldn't resist it. I hope you get it fixed. Keep working on it.

Oh, Bob!! Hahahaha!

That nails it! Perfecto!

How about....

Smily can’t make it up a DEMM hill!!

Peace.

Did you check the compression? Very important ,should be the first check done, it will either eliminate or answer a lot of problems

I had a Malaguti that would only do 25 mph no matter what I did.... then one day I pulled the wheels off and carefully took the axels and bearings out cleaned them all up and put new grease put it all back together and the thing did 33 mph

Then I got a tiny rear sprocket and did 35

For hills you’ll want a big rear sprocket but it will keep your top speed low

But make wheelies easier

Hi, Rich!

Yeah, I am going to clean out the wheels soon. Just got new tires and brakes from our Treatland friends!

I’m sure that will help a bit!

Peace.