At My Witts End!!!! By lcaperell (Read 1,100 times)

[lcaperell]

I have a 2012 taotao was a 50cc bored now to a 80cc. After about a week it started suddenly  having a hard time starting. I have replaced the carb I have changed the main jet and idle jet. New fuel filter new cdi new spark plug getting spark. Just turns over and won't start!!Also did valve adjustment and timing. What gives!!!!

[Bashan]

Spark+Compression+Fuel=Runs. How's the compression?

[cyborg]

You sure it's getting fuel?

[adamhoyer]

Are you sure you got the right CDI? I put one on my scooter that was AC just like the other one and my scooter would not fire up. Maybe try and put the old one back on a see if it fires up.

[lcaperell]

Compression I don't have a meter to measure that is there any other way to do it? My cdi was not the problem I had thought of that too

[royldoc]

Air+fuel, compress, add spark at correct time = BOOM! Did you check for spark with the plug grounded on the engine or frame? It should be checked with plug grounded to engine. Check ground wire from frame to engine. A crude check for compression is to put finger over spark plug hole and crank engine. You should feel the pressure. This is not an accurate check but can be a good indicator

Roy

[jct842]

It should blow your finger out of the hole!

[cyborg]

i'm calling fuel,,,or lack thereof

[royldoc]

Simple test to check for fuel flow issue. Squirt about a teaspoon of fuel into the carburetor to prime before trying to start.

Roy

[adamhoyer]

wrong post lol

[lcaperell]

Update.... Had to have a rebuild. Compression was at 60! So this is my question I have... They put double gaskets on the head they replaced. But the scooter is having issues where it feels like a vaccum leak, a lot of hesitation and bogs down a lot sometimes stalling!! Is it OK to put two gaskets on the head? I would think it wouldn't seal very well. Thoughts?

[jct842]

What do you mean by rebuild? What was replaced? 2 head gaskets could be because of wrong components being used. I heard of using 2 base gaskets to lower compression.

[lcaperell]

I mean they had recently done a 80cc kit about 2 months ago and for whatever reason they had to install it again along with replacing the head. Also I used to have a evg or evr not sure of the correct name but one of those type of valve covers that look like a lock on the front. Well they broke that part off but they didn't block it off.

[lcaperell]

But when I first accelerate it takes off then it starts hesitating and bogging down.

[richardv]

Two head gaskets is a very bad thing to do as you will never get a proper seal. If clearance is needed it should be added at the bottom of the cylinder. There are special products for that.