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Post by jtgolden on Jul 17, 2013 22:22:44 GMT -5
I have a ssr 50cc classic scooter and I recently just put a new carb on the scoot. I took it out for a test drive and it lost power so I immediately checked the carb and the intake hose came off so I fixed that. However, when I tried to start it the sound of the motor was completely different almost as if the most has not compression and that the starter is spinning faster and really high pitched. I put my finger over the exhaust and it didnt put out much compression. Has my motor blown, do I need a new top end? I dont really know how to explain it but it just sounds like the motor is turning over way way to easy and it just dosnt have any compression. I checked the valves and they are set the way they should be. Any advice?
Thanks!
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Post by scoots on Jul 17, 2013 22:25:52 GMT -5
i would look at ur piston u could have blown rings or like me i snapped my crank  but have someone take it apart and put a bbk while yr there if u need a new piston save on labor down the road also it may be a cracked head had plenty of those (4  ) |
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Post by petrol42 on Jul 18, 2013 14:08:27 GMT -5
I would check the spark plug first to see if it's loose or maybe worst, it blew out of the hole taking the threads with it!
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Post by rockynv on Jul 18, 2013 22:15:16 GMT -5
When you put a new carb on you have to be carefull that it is jetted for your motor. You may have burned you cylinder from using a carb that was jetted to lean. You also could have a stuck or burnt exhaust valve from lean running however with the intake blown off you could also have a burnt or stuck intake valve especially if there was not a lot of vibration during the event.
Was there a loud pop or a backfire when this occured?
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Post by larry001964 on Jul 19, 2013 8:17:46 GMT -5
Hi Jtgolden
I think a compression check would answer your questions, Ideal compression is between 150 to about 185.. If you don't have a compression checker, you can rent one from Autozone, just be sure to get the 10 mm adapter...
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Post by scoots on Jul 19, 2013 17:22:19 GMT -5
good call on the spark plug threads i just replaced my 100cc bbk head when it blew out it sounded like death
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