Posted February 2, 201114 yr Hi all My son has got a little Neos yn50 and all was running fine until it stalled for no reason, he said it was hard to start again and then it had no power. when I had a look at it it would rev but then cut out, riding it it wouldn't go over 15 mph. I have checked fuel is getting to the carb and have stipped the carb right down and cleaned all the jets, put a new plug in, I have done a omhs test on the coil and it seems fine, checked ht lead and cap and am now at a loss, so have any of you guys any ideas what to look at next ? Many Thanks in advance Dave
February 2, 201114 yr Author Jets-check fuel-check spark-check air- ? Air ? how do I check air ? Thanks Dave
February 2, 201114 yr Spray wd40 over the air intake area including carb boot and box ( I no nothing about this model btw) with the engine running if there is any air leaks in this area then the wd40 will get sucked through the carb and will result in an audible difference in idle, keep the spray away from the airbox intake itself, it may be a slack or dislodged carb rubber, if this has no effect then check the air filter itself-in the weather we've had recently it might be possible that the air filter is saturated in water ?
February 2, 201114 yr Moderator ...( I no nothing about this model btw) .... me neither, is it a little 2 stroke scooter twist and go jobbie Dave? Can you give a little more detail on the fuel delivery to the carb...are you 100% happy with that? is it a vacuum operated tap or not?
February 2, 201114 yr Author me neither, is it a little 2 stroke scooter twist and go jobbie Dave? Can you give a little more detail on the fuel delivery to the carb...are you 100% happy with that? is it a vacuum operated tap or not? Yep 2 stroke twist an go yes fuel good I sucked the vac pipe and fuel poured out of the other pipe also took main fuel feed pipe to carb off kicked bike over and fuel came out ok. Thanks Dave
February 2, 201114 yr Moderator could the exhaust be blocked? any way of removing the silencer and checking?
February 2, 201114 yr Author could the exhaust be blocked? any way of removing the silencer and checking? Yep I took exhaust to check and all seems fine and replaced with new gaskit. Thanks Dave
February 2, 201114 yr Moderator Yep I took exhaust to check and all seems fine and replaced with new gaskit. Thanks Dave bit vague, how do you know its not blocked? any way you can remove the silencer
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