Gas Issue, Vacuum Issue....not sure  By  scripting25 (Read 3,581 times)

Scripting, I'm pursuing a vacuum leak angle. I'm going to replace all tubing, get it running and warm without driving, and start spraying ether around intake manifold, vacuum lines etc to see if there is a change in idle speed. Will post results.
I don't think it's carb related, with your carb swap, and between the two of us, basically every electrical and fuel component has been changed.

For over a month I have had symptoms similar to this. I had an "eureka" moment last weekend. I have changed out parts and the symptoms have gone away and then came back. I have read this thread and not seen my solution. I found that the spacer was cracked and the nuts somewhat loose. Replaced the spacer and gasket. After this the "new" coil with coil wire was not staying on the spark plug. At idle it would slide down but the vibrations at a higher idle it would rise up and arc, changing the timing. Later it would fall down and seem to be attached. I tossed this and put back on my old one and it works great now. Maybe this will be your moment as well. Buddman

Hey everyone I is back after the winter break here in VA.
The weather is starting to warm up, I wanna ride my scooter around town and.....still can't
I'm back to trying to figure it out.
My test so far this early spring leaves me right where we left off.
Scoot runs great for a bit, I get all excited to ride and then....it chokes out to a death.

I was gonna take it by a scooter shop today but the guy wasn't there. I saw my local neighborhood repair guy out in the yard on the way home so I stopped by for words of wisdom.
Upon looking over the scoot, he noticed the drain tube has thick yellow slime in it as opposed to ......I dunno, dirty liquid...I really don't know what the hose even does.

So I ask you experts....based upon this pic I'll provide, does anyone have an idea as to why the hose has thick, almost mustard like yellow goo in it?
It's not 100% filled with the goo, just a coating more or less. I took all that stuff apart and I don't see that goo anywhere else though. Only in the tube.
Maybe the canister it's connected to isn't working....I dunno.
Thanks!

I'm adding a pic with a wider shot. The air filter casing is what the hose connects to and I'm wondering what is in that area that I've circled in red.
That's where the hose connects and that's a 1 piece unit so I can't see what's in there. I'm wondering if that area could be blocked with that goo and perhaps hinders the motor from running. Does anyone know if that might be the case?
I talked to other friends and they think the yellow goo might be broken down Ethanol, maybe not much to worry about and probably isn't the real issue unless I have bad gas running in there somewhere but I've emptied it a dozen times testing the petcock and fuel filter and I've very recently added new gas for testing.

I have no idea what pulse coils are oh and I just saw the video you added tortoise. Very cool, Thanks, I'll look into it soon as I can.
Not sure if my ride is AC or DC either. Not 2 savvy is this area. It's a generic 150cc scoot if that helps lol

I'm also kinda ready to give in and admit it's a cheap knock off that's kicked butt for 5 years and maybe it's time for it to die
I dunno.
If I do give in, I'll need a place to shop for knock off's. We got ours from scooter depot a few years ago but seems they're out of business and have a lot of bad reviews lol


Thanks again!

O yeah...here's the pic

Hey all

So....last update probably forever
We did a compression check on the motor which turned in great results.
We then did a air leak test which told us there might be a stuck or bent valve.
That was probably the issue all along, a stuck or bent....somehow a bad valve.
I took the top end apart and took it to my friends shop. He was supposed to clean it up for me and that's been 3 month now lol. It may or may not make it back together again.

In the meantime.....I took my wife with me to the motorcycle shop to pick up some dirt bike supplies.
She window shopped and sat on a Yamaha vstar 250cc and instantly fell in love with it.
Mind you, she got us into scootering since other motorcycles were to big and heavy for her. We've been scootering around town for the past 5 years.
So now she feels she's ready to upgrade.
We searched craigslist and found a '13 mint condition vstar 250cc and picked it up for her.
She LOVES it!
I even put a smaller rear sprocket on the bike which helped to stretch out the gears a little bit and gave her another 10-20 mph top speed which we needed for some of the bigger roads.
She allowed me to get a motorcycle and after some shopping and cragslist searching, I got myself an '07 Suzuki Boulevard M50 800cc and love it as well.
Now we have a bigger riding range.
We're looking forward to many riding miles.
We're also keeping her "mooter" in good riding shape until it dies. We'll probably let "sctdwg" die a happy death after all.