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Post by kimmmmer on Oct 30, 2011 0:42:33 GMT -5
the forum has moved itistheride.boards.net/index.cgimy scooter has 2000 miles on it ran great till last week at the stop light just died thought i was out of gas no had gas what it does is when i push the electric start button it just tries to start but will not turn over my son in law says has spark what could be the problem please help |
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Post by edfr on Oct 30, 2011 0:48:23 GMT -5
The valves have tigthen up on you and what happens is the valves are a little open and you loose compression. Adjust your valves to .004 TOP INTAKE VALVE and .005 BOTTOM EXHAUST VALVE.
Lefty
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Post by kimmmmer on Oct 30, 2011 1:20:36 GMT -5
you think is that hard to do ive just been going crazy with this it just died and wont restart wants to start but wont turn over i hope this works thanks
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Post by relaxinrob on Oct 30, 2011 9:11:49 GMT -5
Not turning over is NOT caused by valves. Will it turn over with.the kick starter?
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Post by kimmmmer on Oct 31, 2011 9:54:27 GMT -5
It turns over when I push the start button it just wont start my son in-law says that it has spark when he took the spark plug out so im not sure what could be wrong with the damm thing but before I took it to a shop to be looked at I thought id try this site for maybe some insite on what might could be wrong with my scooter thanks you all for reading my problem...
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Post by relaxinrob on Oct 31, 2011 14:06:12 GMT -5
Ok....it could be valve-related, but my best guess is the carb either got some water from the gas or the jets are clogged. either way, take the air breather off at the back of the carb, shoot some carb cleaner or starting fluid in the back of the carb, then try to start it. If it fires, it is carb related.
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Post by Pony66 on Nov 1, 2011 8:37:08 GMT -5
The valves have tigthen up on you and what happens is the valves are a little open and you loose compression. Adjust your valves to .004 TOP INTAKE VALVE and .005 BOTTOM EXHAUST VALVE. Lefty +1, When a scooter dies at a stop, its almost always tight valves. Any vehicle without hydraulic lifters, requires valve lash adjustment as regular maintenance. Good thing, its very easy. I check valve lash every 1000 miles or so. |
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Post by scootaville on Nov 4, 2011 12:00:44 GMT -5
I have 2 tao tao 50's in the shop that are doing the same thing. Cranks but just wont hit. Both are getting great spark. Adjusted the valves to see it that was the problem. Didn't help, but they were out of adjustment. One of them I was able to finally figure out the problem. There is a vent hose that runs from the valve cover to the air intake going into the carb and it keeps clogging up the jets. For some reason this hose is putting out a milky fluid like oil and water mixed. I unhooked the hose from the intake, cleaned the carb, then plugged the hole in the intake and it starts fine. Still a little hard to get started, but it starts and runs. Anyone else have this problem or know why that hose would be putting out the milky like substance?
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Post by TERRA NUVO on Nov 4, 2011 12:07:52 GMT -5
never run a bike for long with that epa crap on there.
your contribution to cleaner air was buying a bike, not ruining one with exhaust crap going back into the carb.
but you'll need a gas vent filter and valve cover intake protection against dirt.
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Post by georgiocat on Nov 4, 2011 12:24:49 GMT -5
I have 2 tao tao 50's in the shop that are doing the same thing. Cranks but just wont hit. Both are getting great spark. Adjusted the valves to see it that was the problem. Didn't help, but they were out of adjustment. One of them I was able to finally figure out the problem. There is a vent hose that runs from the valve cover to the air intake going into the carb and it keeps clogging up the jets. For some reason this hose is putting out a milky fluid like oil and water mixed. I unhooked the hose from the intake, cleaned the carb, then plugged the hole in the intake and it starts fine. Still a little hard to get started, but it starts and runs. Anyone else have this problem or know why that hose would be putting out the milky like substance? Ehmm...white milky substance is water mixed with oil!If you have that goo comes from the rocker cover breather,check your oil immediately.If it is clear,then you get moisture or water finding it's way from somewhere in the rocker cover.You shouldn't have any...You could have some if the engine is water cooled and the hg has gone,but since it is aircooled this is not the case.You must find the problem and rectify it.Also,let the vent dagling down,below the cvt case. Regarding the dead scooter problem,perhaps the jets are clogged.If you have a fuel filter in line,check to make sure that the element it has inside is not loose and lets dirt enter the carburetor.I would clean everything carefully,renew tubing if not replaced for some time now,new fuel filter and test it again.Also check if there is any dirt in the fuel tank.Do the scooter have a vacuum petcock?Test that too by sucking carefully to the vacuum hose,and having the carburetor fuel supply disconnected,watch to see if petrol flows from there when you apply suction to the vacuum hose.Take care when sucking,cause if the petcock diaphragm is torn,you may drink petrol,not good at all! |
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Post by scootaville on Nov 4, 2011 12:28:38 GMT -5
Is there a way to block off the outlet on the cyl head where that pipe attaches to? Where do the gas vent filter and valve cover intake go? The vent on my valve cover is putting out air and will build up pressure if its blocked off for a few seconds.
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Post by georgiocat on Nov 4, 2011 12:44:06 GMT -5
Can you post a photo of the head with the tube?You can't block it,it vents the crancase too.If you block it,you will ruin the crankshaft seals and gaskets,the air must escape.You can have a length of hose dangling 3-4 cm under the CVT case,from the top of the cylinder head,where the pipe starts,to the underside of the scooter.When you are moving,it will create vacuum and suck the fumes out.If your engine is a heavy breather as we say,if you have a lot of fumes,it may drip some oil too.If it does,you must plan a rebuild soon,since you have a lot of blowby by the pistons in the crancase.Normaly the valve cover intake is not an intake,is an exhaust for oil fumes and combustion blow by gasses.You can vent it to atmosphere with a vertical tube to allow moisture drip down,or if emissions strict rules prohibit it,it is connected to the inlet tract so the engine vacuum draws them in and burn them in the combustion process.Trouble is that this solution oils everything and let crap go everywhere,allowing detonation too under some circumstances.In mine for example it is dangling under the scoot,together with the carburetor drain hose.If you notice it in the below picture it goes down,well at least the part that can be seen in the picture...  What do you mean by saying gas vent filter? |
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Post by scootaville on Nov 4, 2011 14:00:54 GMT -5
Tera Nuvo mentioned something about a gas vent filter being needed when taking the EPA stuff off of the scooter. Both of the scooters I have in are 2011 models with less than a 1000 miles. Im really disgusted with Tao Tao's products right now. Just replaced a engine on one of their 110 atv's with less than 8 hours on it. It had a bent exhaust valve.
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Post by edfr on Nov 4, 2011 15:29:28 GMT -5
The Valve Cover Vent Hose must be on and NOT KINKED and the other end open to releive pressure from the crankcase. You can put a Fuel Filter on the end of it and zip tie it HIGH on the frame in case it squirts oil out it will drain back into the Valve cover. Lefty  |
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