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Post by scootdoggydog on Sept 29, 2014 22:21:27 GMT -5
My scooter broke down on me and after trying everything spark, fuel, and compression I found I no longer had good compression so I ordered a 59mm BBK Ive never replaced the top end before. Ive changed heads though and watched a youtube video its not the best quality so Im a little nervous as I dont want to mess anything up. So I was wondering what am I looking at how tough of a job is this and are there any pointers anybody could give me to help me out.
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Post by alleyoop on Sept 30, 2014 14:42:14 GMT -5
Just make sure you put the rings on right and in the right order and space out the gaps around the piston you do not want the ring gaps to line up one above the other.
Alleyoop
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Post by scootdoggydog on Oct 6, 2014 20:54:12 GMT -5
How do you know what order to put the rings in. I know the oil rings go on the bottom but Im not sure about the top and middle I have 2 rings one that has an R on it and the other has RN on it.
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Post by alleyoop on Oct 6, 2014 21:53:05 GMT -5
One should be beveled like this \ that goes just like that on the second from the top slot.
Alleyoop
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Post by scootdoggydog on Oct 7, 2014 15:20:04 GMT -5
So I took out the camshaft and these pieces fell out  Could anybody tell me what they are for where they go what they do and what would happen if I didnt use them? |
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Post by alleyoop on Oct 7, 2014 15:30:45 GMT -5
What motor is in that scoot? is it a 139qmb motor or what? That looks like a camshaft stopper of some kind.
Picture of your cam and head and rocker assembly would help id the part.
Alleyoop
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Post by scootdoggydog on Oct 7, 2014 18:09:27 GMT -5
Its a 157qmj So yeah youre right its a camshaft stopper  And heres where it goes on the cam  not sure about the little pieces and springs though are they really needed and what would happen if I didnt put them back in? |
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Post by alleyoop on Oct 7, 2014 18:48:03 GMT -5
if you don't put them back in you will not have a functioning cam stopper. So the worse case scenario is it could start up backwards but you would know that right away and shut it down and try again.
Alleyoop
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Post by scootdoggydog on Oct 7, 2014 23:15:04 GMT -5
Alright I think this is how it goes  and then theres a washer that sits on top of it |
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Post by scootdoggydog on Oct 20, 2014 17:45:56 GMT -5
I got it all back together and have been riding it for a while now it seems like its just fine but everytime I start it up it shoots smoke out of the muffler for a while like a minute or so and it only happens after its been sitting for a while is this normal?
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Post by xyshannen on Oct 20, 2014 21:47:01 GMT -5
What color is the smoke?
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Post by scootdoggydog on Oct 20, 2014 23:44:36 GMT -5
gray or whitish maybe it smells good is there any way i could get it to shoot out flames?
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Post by alleyoop on Oct 20, 2014 23:51:30 GMT -5
If it is white it is fuel, so it could be a little rich due to the enricher also feeding it extra fuel for cold starts. If it is blueish it is oil and that would mean the valves are leaking a little and a little bit of oil dripped down into the chamber and that gets burned off soon after the motor starts.
Start it up and right away put your palm by the muffler and it will get on your hands and then you will know if it is gas or oil.
Alleyoop
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Post by scootdoggydog on Oct 21, 2014 16:44:39 GMT -5
i think its gas but it could be oil
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..BAD TO THE BONE..
