Post by nanetteswisher77 on May 18, 2014 14:42:46 GMT -5
Fair warning: I am not exceptionally mechanically inclined and everything I have learned about my scooter I have learned off of youtube, forums, and what little my ex helped me with the first time we tore into it. I don't know much, but I have taken apart and put this motor back together enough to know how it is supposed to go in etc.
Ok so here are my issues:
I bought a new 150cc GY6 motor from T motorsports. I got the motor, installed it and was having some major popping issues and backfiring a LOT and got almost no power. I could barely go 20 mph. I did some research and somebody told me that they had also purchased a motor from the same place and they had the same issues. It ended up being the head was ported incorrectly. I popped open my motor and sure enough the new head in the brand new motor was ported way smaller than my old head. So i dunk tanked my old head and cleaned it up good as brand new and installed in into the new motor. I bought brand new valves and titanium springs to go with it because the old valves were caked in black gunk. I got it all put back together and started it up and the popping has stopped but I am not getting any speed or power and it is really slow taking off. Like I gotta twist the throttle quite a bit before the scooter actually takes off and when it is up on the stand the back wheel takes a while to start turning. (could this be because the weights in the CVT are too heavy?) I got on the scooter and rode it down the street and it is still bogging bad. I can't get above 35 mph or so. And it still backfires once in a while when I go that fast. When I turn off the scooter every once in a while it lets out a "poof" from the exhaust. Not exactly a backfire just an airy type "poof" sound. Also is the CDI supposed to get warm? Mine is getting quite warm to the touch while the scooter is running. I am also getting conflicting information on which mark to set my cooling fan at to ensure I am at TDC. Some people say it is the "T" mark but two different manuals I have downloaded say it is the "F" mark. Mine looks like this ------|TF| on the side of my fly wheel (is that the flywheel that has the timing marks not sure???). Should I match the mark on the side of the case to the F or the T? I adjusted my valves to .004 intake and .005 exhaust as it was on my other motor which ran great for me. If the correct mark is the F mark then that may be my problem because I have it lined up with the T mark. The cam is lined up correctly with the small holes lining with the head and the large hole straight out from head. I am at my wits end with this project. It is even more frustrating because I am bound and determined to finish this myself and seem to be stuck because I get so much conflicting information. Depending on which site I go to and who I ask I get different answers as far as valve adjustment settings and where to line up the fly wheel on the case at T or F mark.... GRRRRRRR.....
<<<< I feel like I am beating the proverbial dead horse....
These are the changes I have made to the original motor that came with my scooter all these changes worked great in the old motor. I ditched the automatic choke and blocked off the holes that the choke used to hook to and bypassed it. It was the way my old motor was set up and worked fine. I have a mikuni fuel pump on it and I bought an in line fuel filter from napa. It is not as big as my old fuel filter which was a paper filter one. The new one I bought is a plastic cone with a gold metal "screen" in it. It is for a 660 quad or for dirt bikes. Is this fuel filter too small maybe? The motor came with a brand new coil and starter solenoid etc so I installed both brand new. I also vented my gas tank because it was vapor locking on me during long rides.
I had to change the motor out because I put 5000 hard miles on that poor thing hauling two people around all summer long at 55 mph. I blew that poor thing so bad the piston cracked in three places on the intake side. I did not maintain the motor properly because I had no idea how to care for it as I do now. Oil changes and valve adjustments etc.
So to any of you who can help a girl out I would REALLY REALLY REALLY appreciate a point in the right direction and maybe a few correct answers to the questions I have gotten conflicting answers to.
Thanks in advance!!!
Ok so here are my issues:
I bought a new 150cc GY6 motor from T motorsports. I got the motor, installed it and was having some major popping issues and backfiring a LOT and got almost no power. I could barely go 20 mph. I did some research and somebody told me that they had also purchased a motor from the same place and they had the same issues. It ended up being the head was ported incorrectly. I popped open my motor and sure enough the new head in the brand new motor was ported way smaller than my old head. So i dunk tanked my old head and cleaned it up good as brand new and installed in into the new motor. I bought brand new valves and titanium springs to go with it because the old valves were caked in black gunk. I got it all put back together and started it up and the popping has stopped but I am not getting any speed or power and it is really slow taking off. Like I gotta twist the throttle quite a bit before the scooter actually takes off and when it is up on the stand the back wheel takes a while to start turning. (could this be because the weights in the CVT are too heavy?) I got on the scooter and rode it down the street and it is still bogging bad. I can't get above 35 mph or so. And it still backfires once in a while when I go that fast. When I turn off the scooter every once in a while it lets out a "poof" from the exhaust. Not exactly a backfire just an airy type "poof" sound. Also is the CDI supposed to get warm? Mine is getting quite warm to the touch while the scooter is running. I am also getting conflicting information on which mark to set my cooling fan at to ensure I am at TDC. Some people say it is the "T" mark but two different manuals I have downloaded say it is the "F" mark. Mine looks like this ------|TF| on the side of my fly wheel (is that the flywheel that has the timing marks not sure???). Should I match the mark on the side of the case to the F or the T? I adjusted my valves to .004 intake and .005 exhaust as it was on my other motor which ran great for me. If the correct mark is the F mark then that may be my problem because I have it lined up with the T mark. The cam is lined up correctly with the small holes lining with the head and the large hole straight out from head. I am at my wits end with this project. It is even more frustrating because I am bound and determined to finish this myself and seem to be stuck because I get so much conflicting information. Depending on which site I go to and who I ask I get different answers as far as valve adjustment settings and where to line up the fly wheel on the case at T or F mark.... GRRRRRRR.....
<<<< I feel like I am beating the proverbial dead horse....These are the changes I have made to the original motor that came with my scooter all these changes worked great in the old motor. I ditched the automatic choke and blocked off the holes that the choke used to hook to and bypassed it. It was the way my old motor was set up and worked fine. I have a mikuni fuel pump on it and I bought an in line fuel filter from napa. It is not as big as my old fuel filter which was a paper filter one. The new one I bought is a plastic cone with a gold metal "screen" in it. It is for a 660 quad or for dirt bikes. Is this fuel filter too small maybe? The motor came with a brand new coil and starter solenoid etc so I installed both brand new. I also vented my gas tank because it was vapor locking on me during long rides.
I had to change the motor out because I put 5000 hard miles on that poor thing hauling two people around all summer long at 55 mph. I blew that poor thing so bad the piston cracked in three places on the intake side. I did not maintain the motor properly because I had no idea how to care for it as I do now. Oil changes and valve adjustments etc.
So to any of you who can help a girl out I would REALLY REALLY REALLY appreciate a point in the right direction and maybe a few correct answers to the questions I have gotten conflicting answers to.
Thanks in advance!!!
..BAD TO THE BONE..