No torque, no acceleration.

Hey, what's up? I have a 1980 Pacer Moped that's been giving me some trouble (I'm not sure of the model, it doesn't seem to have any name besides Pacer.) Anyways, I've had it about 8 months and in that time, I've put around 800 miles on it. Well, recently, it started bogging down and stalling out a lot more. It doesn't accelerate as quick, doesn't have as high of a top speed, and it's hill-climbing really sucks. It used to go 25-28mph on flat terrain, but now only gets up to 19-20. I cleaned the carb and put in a new spark plug, but that didn't change anything. It is still sluggish. I'm sure there's an obvious solution to this problem, I'm just not too experienced with maintaining it. Could it be perhaps related to something in the transmission going wrong?

On a related note, what is the best octane fuel for a 50cc two-stroke? I've been using 92 or whatever the premium gas is.

How much oil should I be putting in per gallon? I've been following the original instructions loosely, which says 6 fl. oz./tank (0.9 Gal tank).

I'm still looking for a shop manual for the bike, but haven't found one yet. Any thoughts?

Thanks a lot.

RE: No torque, no acceleration.

Hello Tom,

Have a look at your exhaust. It may need to be cleaned.

Anyway, that's my 2 cents.

Good Luck!

MopedmanTom wrote:

>

> Hey, what's up? I have a 1980 Pacer Moped that's been giving

> me some trouble (I'm not sure of the model, it doesn't seem to

> have any name besides Pacer.) Anyways, I've had it about 8

> months and in that time, I've put around 800 miles on it.

> Well, recently, it started bogging down and stalling out a lot

> more. It doesn't accelerate as quick, doesn't have as high of

> a top speed, and it's hill-climbing really sucks. It used to

> go 25-28mph on flat terrain, but now only gets up to 19-20. I

> cleaned the carb and put in a new spark plug, but that didn't

> change anything. It is still sluggish. I'm sure there's an

> obvious solution to this problem, I'm just not too experienced

> with maintaining it. Could it be perhaps related to something

> in the transmission going wrong?

>

> On a related note, what is the best octane fuel for a 50cc

> two-stroke? I've been using 92 or whatever the premium gas is.

>

> How much oil should I be putting in per gallon? I've been

> following the original instructions loosely, which says 6 fl.

> oz./tank (0.9 Gal tank).

>

> I'm still looking for a shop manual for the bike, but haven't

> found one yet. Any thoughts?

>

> Thanks a lot.

>

RE: No torque, no acceleration.

Never heard of a Pacer

With modern 2-stroke oils you should probably pre-mix between 3 oz.( 43 to 1) or 4 oz.(32 to 1) of oil per gallon of gas.....and mopeds are designed to run on the lowest octane of gas you can buy (87 oct.) because they are afraid that somebody who doesn't know better will put the cheap stuff in..... and higher octane will not make it run better or faster or make more power.

Clogged or dirty carburetors (on the inside) are the most common reason for poor performance... the carburetor must be removed..... then you take off the float bowl.... then you remove the brass "main jet" in the middle of the carb.... hold it up to the light and look thru it.... it must be clean and clear..... if it is not clear you must poke a piece of fine wire thru it.... a wire plucked from a wire brush works good.... or some soft multistrand copper wire like from speaker wire or lampcord wire... don't use a drill bit !!.... next you should screw the idle mixture screw in while counting how many turns out it was set at..... then remove it and all other screws...... now you must clean out all passages in the carb with aerosol carb cleaner and compressed air (like 100 psi) with a blow nozzle... squirt the cleaner in all orifices one by one followed by a blast of compressed air.... while you are blowing air thru the holes feel with your fingers to feel where the air is coming out of and blow the other way too...... then reassemble all the parts (remember to turn the idle mixture screw out to its original setting... usually between 1 and 2 full turns out from all the way in) and reinstall the carb.

The next most likely cause of bad running are dirty or mis-adjusted ignition points..... to clean them you need some fine grit sand paper (like 400 grit), a piece of clean paper, some scissors, and some aerosol brake cleaner or carb cleaner and some compressed air with a blow nozzle....... remove the ignition cover and look for the points in one of the holes in the flywheel.... lay the bike over on its side and sit on a milk crate or something to get comfortable... then cut some thin strips of sandpaper.... pry the points open with a small screwdriver and stick the piece of sandpaper in between the points and let them close.... then pull the sandpaper out.... do this several times to each side.... now pry the points open and blow them off with compressed air... then spray them with the cleaner.... then cut a strip of the clean paper and pry the points open again and drag the paper thru a few times.... blow them off again with air while open.... now they should be good..... next find the timing mark on the flywheel and see if the points open when the mark on the flywheel passes by the mark on the engine case.... that is the timing and to set it accurately you would need special tools or take it to a shop to have it set.... if it looks like it opens when the marks line up you are probably OK.

I am going to save these instructions and post them when people need them.

RE: No torque, no acceleration.

If nothing of the above helps, try checking the compression in the cylinder. (1) You might need to replace the piston rings with new ones if you don't know for sure the total mileage of the bike. (2) However the replacement will not be necessary if the rings just got charred in the grooves due to excess of oil or wrong oil used. In this case just soak the piston in gas or in a special solvent to remove char. Avoid using car oil when preparing the fuel. It produces a lot of buildup all over the combustion chamber and the exhaust manifold. Stick to 2-stroke oils.

CORRECT OCTANE NUMBER: if the compression ratio (see manual) is below 8 you can use 87 gas. If it's 9 thru 11 use 92 gas.

RE: No torque, no acceleration.

Skeeks Mcgee /

Hmm...no torque and no acceleration.....maybe it's because...

YOU'RE RIDING A MOPED!

Maybe you should drop it off of a cliff and buy a scooter?

The Skeeks.

http://www.angelfire.com/fl2/miner49er

RE: No torque, no acceleration.

I've always wondered what it must feel like to be useless there Skeeky Boy.... Tell me... what does it feel like?.... by the way... in the US what you call "scooters" are classified as "mopeds".... even if it doesn't have pedals.... it just has to have 49cc.... with a couple exceptions (fast ones)

RE: No torque, no acceleration.

Thanks for the advice, mopedman. After cleaning my carb & points, replacing the spark plug; I still had problems. I took off my muffler, and the acceleration & hill-climbing power were back, for the most part. It's really loud (which is illegal, I think) but it sure runs better. I'm going to have to get my hands on a torch to burn it out with. Either that, or I'll buy a new exhaust pipe & muffler. Any advice on finding a good muffler?

-Tom

RE: No torque, no acceleration.

Reeperette /

Err, Skeeks ?

My 1989 Tomos Golden Bullet TT LX would pound most 50cc Scooters into the ground, man - even this POS Suzuki I got now will bury them..say again ?

Besides, everybody knows the only Scooter worth a damn is the 244cc Honda Helixx - and that's not a Scooter, it's a motorcycle pretending to be.

Ree.

RE: No torque, no acceleration.

By saying blowtorch I actually mean a gasoline blowtorch. Don't now what it is? Well, it's a steel tank with a handle, an air pump and a burning assembly on top. The burning assembly consists of a pre-heating tube, a vent and a nozzle. If you don't have this thing, you can use your propane torch but with care because it's a lot hotter than the gasoline one, and you can just unweld the muffler seams, so don't open it to full throttle.

RE: No torque, no acceleration.

When is the last time you actually saw a real live gasoline blowtorch for sale? Daniel....... I've seen pictures, and seen them on TV or movies.... but never in person..... what do you do?.... pump them by hand every few minutes?.... I wouldn't mind having one.

RE: No torque, no acceleration.

yeah buy a scooter so you can have a complicated plastic disposable 1/2 battery operated piece of crap

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