Yamamoto 150 quad

Dean56 · 05-14-2021, 10:31 AM

Ho folks, just replace carb on my grandsons quad, now wont start unless I give it the starting fluid and the runs great, better than it has in a long time. Have read other forums which said low compression, bad valve lash, blah, blah, blah. If there was low compression how could it run strong once it started? I've rebuilt twin cylinder Onans and when their compression gets lower the will nor run at all or are powerless. I will do a compression test this weekend just to be sure. Any ideas?

TxTaoRider · 05-14-2021, 10:42 AM

If valve lash is real tight, they'll be real hard to start cold, but run ok afterwards. In fact theyll sometimes even start ok afterwards.

Or you might try richening up your idle.

05-14-2021, 10:31 AM	#1
Dean56 Join Date: May 2021 Location: Morris, Illinois Posts: 1	Yamamoto 150 quad Ho folks, just replace carb on my grandsons quad, now wont start unless I give it the starting fluid and the runs great, better than it has in a long time. Have read other forums which said low compression, bad valve lash, blah, blah, blah. If there was low compression how could it run strong once it started? I've rebuilt twin cylinder Onans and when their compression gets lower the will nor run at all or are powerless. I will do a compression test this weekend just to be sure. Any ideas?
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05-14-2021, 10:42 AM	#2
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	If valve lash is real tight, they'll be real hard to start cold, but run ok afterwards. In fact theyll sometimes even start ok afterwards. Or you might try richening up your idle. __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
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