66cc 2 Stroke won't start -- tried everything I've read online. Please look at the checklist of what I've tried and see video

[JoeMetro]

Here is a video of attempted start.

Here is what I've checked and done:

• Checked for spark, it's there
• Magneto & CDI checked with multimeter, actually these 2 parts are brand new .
• Fuel is good
  • Fuel valve is open
  • Fuel in carb bowl, I always hit the button a few times before starting.
  • Wiped spark plug clean, tried to run bike, confirmed spark plug is wet with fuel. Brand new B6HS
  • Tried with clip in middle and most lean position
• Kill Switch is disconnected
• Tried with various positions on the choke from completely on to completely off
• I've tried starting the bike with 1/2 throttle to ensure it's not the idle screw
• Compression seems to be there
• Gaskets are new
• 40:1 oil
• Wood ruff key is at 1 o clock position at TDC
• Flipped magnet and tried with both directions

From what I've read online after all this checking I should be good... anyone have some advice? Thank you.

 

[Davideo]

Here is a video of attempted start.

Here is what I've checked and done:

• Checked for spark, it's there
• Magneto & CDI checked with multimeter, actually these 2 parts are brand new .
• Fuel is good
  • Fuel valve is open
  • Fuel in carb bowl, I always hit the button a few times before starting.
  • Wiped spark plug clean, tried to run bike, confirmed spark plug is wet with fuel. Brand new B6HS
  • Tried with clip in middle and most lean position
• Kill Switch is disconnected
• Tried with various positions on the choke from completely on to completely off
• I've tried starting the bike with 1/2 throttle to ensure it's not the idle screw
• Compression seems to be there
• Gaskets are new
• 40:1 oil
• Wood ruff key is at 1 o clock position at TDC
• Flipped magnet and tried with both directions

From what I've read online after all this checking I should be good... anyone have some advice? Thank you.

Sometimes the choke closes automatically and you have to hold it open with an elastic band or spring. Just a thought, it happened to me once and my engine sounded something like yours. It happens and can be fixed by tightening some screw, but the spring works for me so I haven't got around to fixing it permanently.

 

[Venice Motor Bikes]

Is this a brand new engine? has it ever been started before?

 

[JoeMetro]

Sometimes the choke closes automatically and you have to hold it open with an elastic band or spring. Just a thought, it happened to me once and my engine sounded something like yours. It happens and can be fixed by tightening some screw, but the spring works for me so I haven't got around to fixing it permanently.

That's a good thing to look out for, I'm not having that problem though since I recently tightened the choke lever nut and have not noticed it go down on it's own.

Is this a brand new engine? has it ever been started before?

Nope, it's a bike that was garaged for 3 or 4 years. I recently took it all apart and reinstalled it on the bike replacing parts that looked beat up (eg the carb).,

 

[Venice Motor Bikes]

Make sure the carb is assembled correctly!! Lots of guys put the slider, needle & C clip in wrong.

 

[xXNightRiderXx]

How are you trying to start it? Short kick start with the pedals, or a long rolling start while pedaling? I had an engine that wouldn't start unless I did a long roll with the clutch out. Had to roll a good 30 seconds before it caught. That engine gave me all sorts of problems too, from dry clutch bearings to a blown head gasket. On occasion, if I left it sitting for about a month, it wouldn't start unless I rolled for a good 2 minutes. Just my experiences. Worth a shot.

 

[Johnny trigger]

Open gas cap to vent.. if not try new head gasket and torque the head bolts

 

[Larry Trotter]

Well it used to run and you replaced the carburetor and now it doesn’t run. To me that would be a reasonable hint at the problem.