New Rider
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Joined: Jan 3, 2016 10:50:27 GMT -5
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Post by dbsounds on Jan 3, 2016 10:53:14 GMT -5
Back Story.... Originally I got this scooter from my sister-in-law to fix because she had bought it used and had already spent over $400 taking it places to get fixed and they would only get it running for a few days... So she gave it to me thinking I could fix it since I'm a mechanic. So now I have it and it wont start. Come to find out the head has been replaced twice, the kill switch has been replaced, CDI box has been replaced, spark plug has been replaced, carb has been rebuilt already, and wiring has been altered... I've replaced the CDI box, spark plug, cleaned the carb out, adjusted the valves, and fixed all the wiring issues. The thing is getting plenty of fuel, now has good continuous spark, etc. I can get it to sputter at wide open while spraying starter fluid in, however I find out it has horrible compression only 30psi max after attempting to start multiple times. So after only 400 miles on this thing its getting rebuilt. My question is, since I have messed with scooters before and this thing only having 400 miles on it, is this kit I found on eBay and good and is there anything else I should get and replace along with it? I don't want to sink a ton of money into this thing because I'm just going to sell it for some different toys that are more my taste. Here is the link to the kit I'm looking at... www.ebay.com/itm/Glixal-ATMT1-005-High-Performance-GY6-50cc-to-60cc-44mm-Big-Bore-Cylinder-Kit-/172034332809?hash=item280e0b9889:g:9o4AAOSwSHZWdWEh&vxp=mtrThanks in advance for any help!
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Post by tortoise on Jan 3, 2016 12:50:00 GMT -5
Verify the head has the proper length valves . . then check for a timing issue by inserting a probe into the sparkplug hole to sense when the piston is at top-dead-center, and observe if flywheel and cam sprocket marks are properly aligned. Also check if compression changes after squirting a little oil into the sparkplug hole while the throttle is wide open.
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Post by JerryScript on Jan 3, 2016 20:43:34 GMT -5
If you plan on selling it, you may be able to just replace the piston, rings, and gaskets. Once you have pulled the jug, check the cylinder walls, if they are not scratched by bad rings, you can just replace the piston and rings (maybe just the rings).
If there is significant scratches or grooves in the cylinder, then replace the jug and piston and rings.
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Post by rockynv on Jan 4, 2016 0:57:47 GMT -5
Head replaced twice and did they use a new head gasket or just reused the potentially old defective one? At 30 psi compression you commonly hear of the dipstick blowing out and the purge tube overflowing if its not a bad valve. Time to check the valve timing and if correct then pull the head and take good look before ordering parts. You may have to reset the timing chain, need a valve or could have a perforated piston top or may just need a new head gasket.
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