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Valve timing

  #1  
Old 03-07-2019, 05:13 PM
Weekend Warrior
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Join Date: Mar 2019
Posts: 4
Default Valve timing

we have an old 2000 Yamaha breeze 125 that was blowing oil out the breather so we decided to tear into it and replace the piston and rings. Followed the service manual for it and completed the replacement. Now canít get it to fire. We have compression, but wants to keep blowing gas into airbox out of carb. I set timing chain at TDC according to flywheel and can sprocket. When turning motor over with a socket and watching the valves, I have TDC set just before exhaust stroke, is this correct? Or should I do a 180 with it and set to just as intake is opening?
i did adjust valves while at TDC per manual specs. Not sure why I canít figure this out, need some help here! I do have plenty of spark as well and newer carb.
thanks for any help
 
  #2  
Old 04-04-2019, 04:12 PM
Kymco 450i's Avatar
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Join Date: Jan 2016
Location: Perrysburg Ohio
Posts: 1,566
Default

Do a compression test...if little or no comp your out a revolution.
 
  #3  
Old 04-04-2019, 05:59 PM
Weekend Warrior
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Join Date: Mar 2019
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I have great compression now, just went thru the carb completely, all clean. Spark plug isnít even getting wet. If I hold my hand over the air intake of the carb I get a hand full of gas with plenty force...
 
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