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

JoeMetro

Member
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.
 
JoeMetro said:
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.
Click to expand...
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.
 
Davideo said:
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.
Click to expand...

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.

Venice Motor Bikes said:
Is this a brand new engine? has it ever been started before?
Click to expand...

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).,
 
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.
 
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.
 
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