MOPED ARMY

like i said its probably the kit itself like the piston is a little too big for the cylinder. happende on a n old bike of mine

HA! the speedo needle used to hit zero pretty hard and stop. This is about equal to 60 mph on a tomos speedo

Tim, if you would, more details, exact definition of the noise, when and more specifically, where it occurs, and what plug you are using.

The only guess I could hazard would be the plug not vaporizing the gasoline at the right moment, and that would be either timing or plug type/heat range.

Do you have an advanced ignition on it ?

-Ree

I think it's your ignition. Some ignition systems have a spark-retarder on it, wich causes the sparkplug to fire a bit later to limit the revs. Is the spark is retarded too far the exhaust will be popping and the bike won't accelerate very good anymore. The retarding system only kicks in at certain revs, so you wont notice antything at lower revs. If you block the retarding system (mechanical retarding system as seen on old Honda's) or cut the earth-wire on the rev-limiter (electronic ignition) the spark wont be retarded anymore, wich will make the engine run more smoothly, make it able to do more revs and it'll stop the popping in the exhaust and lack of acceleration when it pops.

I recently had another ignition problem myself wich caused poor running and a popping exhaust. The high-voltage ignition coil was getting old (27 years old!) so I had to replace it and that was the end of the problem. I now have a coil mounted for a motorcycle, so it's of better quality that the original coil, it cost me $15.

yo, ivo. your probably right since you've helped me with nearly every other problem ive had with my many peds. However, if it is the ignition, why didnt this problem occur 3 months ago when it ran fine?

like i said once those pipes leak it will wear at the cylinder and make a gap between the piston and it. hapened on my old bike. you need a new cylinder and piston DO NOT MESS WITH THE ELECTRONIC IGNITION!!!!!!!!!!!!!!!!!!!!!!!! if you fail to listen to me u will fuck up your whole moped. (plz excuse my french) well hope that helps.

-mike

Tim

NOBODY can wave a magic wand and divine what the heck is wrong with your ped from over the net...especially when you don't help much.

Anybody you take it to to get it fixed will go through a process of elimination based on what you tell them.. and their experience.

You HAVE to pull the main jet out and look through it.

You HAVE to check the plug and report back on what you find.

You HAVE to check ignition timing.

So far you are not even sure if you have an electronic ignition or points.

Pull the dang ignition cover and LOOK at it !!... then tell us!

If it has points they prob just need to be cleaned and set.

And... "why would the ignition be bad now when it ran fine 3 months ago"?

Because ...SHIT HAPPENS !.... Just because I didn't have the Flu 6 months ago doesn't mean I won't have the Flu tomorrow !!

The "piston is too small for the bore" is most likely not true ... it was a new piston recently..right?...Then it is not the piston and bore UNLESS it had a seizure (or the bore guy was a total hack).. you said you had the piston and cyl off to look for what might be wrong... did the piston have ugly scuffs and scrapes on it's skirt ?... if it didn't .. then the piston and bore should be fine.

However.. I did see you said where it doesn't have an air filter.. and if you ride where there is much dirt your piston and ring life will be drastically shortened.

If I had your ped in my hands.. I would figure out what is wrong within 1 hour...(but I have all the tools too)... they are NOT mysteries.

When you asked before .. I told you twice. it wasn't the pipe.

Basic premise of mechanics - check the simple things first.

You chose not to provide the details of your exact actions such as checking these things, and there is no logical way for anyone of this forum to have known whether you checked them or not - so we start from the ground up when giving advice, because not everyone who asks is an experienced mechanic.

That being said, if your only response to honestly and freely given assistance is an attitude problem, bugger off, we don't need it.

If you wish to consider help offered by people who ride these things every friggin day a "load of crap" go to your local cycle shop and pay THEM $60.00 an hour to tell you the same damn thing.

I've offered you all the assistance I am going to, guy...and as for that, some here have advised against speed kits because of the possible carnage factor, and some actually have speed kits that DO work, cause they have made them work - so your commentary on lack of skill would be extremely misplaced, but I digress.

In short, take your busted 'ped, and your funky attitude, and hit the road, preferably face first.

-Ree

Well that is part of your problem... If you think that was a "load of crap"... then you missed the good advice in there.

And if you had paid attention back when I told you "it wasn't the pipe" we could have found your problem before your crank destroyed itself.

But you know better.

All I know is us "moped gods" aren't sitting around with blowed up motors !... LOL

I'll buy it for......$50.... deal?

Harm and Destroy wasn't what you were supposed to do to yer ped !

Well, alright Erin! Where'd you come from? I didn't know there were that many ped-smarts out yonder in Nebraska! :) (jk)

Glad to have ya!

s