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Post by ads218 on Sept 23, 2006 15:31:11 GMT
I have a lowish mileage Taishan 50 and the problems i am having are :- Will not start unless using the kick start. Electric start working fine but the engine will not fire unless kicked off. The scoot is also running quite poor in that the engine seems to be 'hunting' and holding back. Not sure if the two problems are related. I have stripped and cleaned out the carb,changed spark plug, set valve clearances, cleaned out fuel and air filter,fitted new suppressor cap. Any help or ideas would be appreciated as i am ready for skipping the dam thing.   |
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Post by Macrofeet on Sept 23, 2006 15:38:53 GMT
kick start - 1st thing to try sounds like the battery is low and needs a good charge, if it still wont start when the battery is full then you may have a weak electric starter if it does start then
it could be the battery was never charged up enough
or 2ndly there is a loose connection etc so power is not getting fed back into the battery from the generator
holding back sounds like rollers to me get lighter 5 gram
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Post by ads218 on Sept 23, 2006 15:59:20 GMT
Have had lighter rollers fitted a while back.
The holding back is intermittant and feels a little bit like it is lurching then hasitating.
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Post by Macrofeet on Sept 23, 2006 16:56:14 GMT
if they fitted cheapo rollers they could be worn out
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Post by ads218 on Sept 23, 2006 17:50:17 GMT
Macrofeet - would the rollers cause cause it to run so badly?. I thought they just improved performance/acceleration.
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Post by ads218 on Sept 24, 2006 14:48:11 GMT
I have also noticed that the spark seems to be quite poor even tho it is a new plug..
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Post by jialing on Sept 24, 2006 15:47:56 GMT
sounds like a fuel mixture thingy to me maybe its running too rich or too lean
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Post by Macrofeet on Sept 24, 2006 18:16:52 GMT
had some cheapo rollers off scooter assasins
they wore out really quick(flat spots)
it does affect speed and accel
if you think you got a weak spark my advice would be to test your coil
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Post by ads218 on Sept 24, 2006 19:21:02 GMT
I have adjusted the mixture many times without success.
The rollers could be worn.
How do you check the coil Macrofeet?
Ta
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Post by px166bajaj on Sept 24, 2006 22:06:24 GMT
I once had exactly these symptoms on a Honda C90. It turned out that a previous owner had reassembled the advance/retard mechanism incorrectly, jamming it. In your case I would suspect the CDI unit.
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Post by ads218 on Sept 29, 2006 14:31:57 GMT
Can Anyone tell me how to check the Coil Please !!!
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Post by px166bajaj on Sept 29, 2006 18:30:09 GMT
1st thing to do is check for a weak spark
But I would get the CDI checked
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Post by toftscot on Oct 1, 2006 9:26:48 GMT
had this on tai :Pshan no power only start on kick-
pipe at top of engine off ( advance retard???)
pushed pipe on started with electrical stjavascript:add("%20:P")
Tongueart......
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Post by ads218 on Oct 7, 2006 15:42:50 GMT
I have just got the Scoot back from a local garage who could not find the fault $%£%£.... As stated before it will start ok on the kick start but not on the electric start which is working fine just will not fire unless using the kick start. I am still not sure whether i have two seperate faults or they are related but the other fault i have is - When running seems to build up speed reasonably well up to about 20 mph then gets sluggish and has a slight 'jurky' feel to the acceleration. It will then only build up speed when going downhill on the flat it will labour for ages. I have - Set the Valve clearences . changed the Spark Plug to NGK. Changed suppressor cap. Cleaned out the Carb. Set mixture. Checked transmission. Checked all pipework and fuel lines/filters. Oil change. Visually checked wiring and blown out any moisture. Checked what appears to be a weak spark- but have been advised that they have a weak spark anyway- (Comments please !!!) . The only thing i can think now is could it be the Cdi or Coil?, but do not want to buy unless sure which one or both to buy. What is the best way of checking either and has anybody any spares?. I may have been repeating myself in peviouse threads but i an really getting fed up with this problem and i am thinking of skipping the dam thing if i cannot sort it out. Thanks anyone for reading and any usefull seggestions would be gratefully appreciated. Thanks in anticipation. |
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Post by jialing on Oct 8, 2006 0:32:22 GMT
I just put a skip outside my place if you like you can use it for free LOL
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Post by larry8 on Oct 8, 2006 0:35:32 GMT
Could be bad or old gas. Drain it and put in fresh Shell premium high octane, add 1/2 oz 100% pure alcohol (get at paint store) don't use rubbing alcohol. The alcohol will absorbe water in the tank. run for 10 minutes then drain tank. put in fresh gas. Install a racing CDI will help too. Buy a "battery tender" and hook it up to the battery so you can plug it in at night. In the morning the battery will be fully charged and you should be able to start it easily.
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Post by ads218 on Oct 8, 2006 18:57:33 GMT
Thanks for the offer Jialing.
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Post by ads218 on Oct 8, 2006 19:04:28 GMT
I have just spent most of Sunday afternoon on the Scoot and believe i have found the long standing problem.
I fitted a new coil and lead unit and it is a different scoot now. The spark was only slightly stronger when the new coil fitted but it made a hell of a difference. So anyone who has the same fault do not believe that the coil is ok if a spark is there. The difference i noticed that the spark had a irregular pattern and not a positive arc.
So thanks so much to everyone who helped in this long standing problem and thanks to the Forum organisers - Cheers - One hell of a Forum A++++++++++++++++
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