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Post by Kaveman on Mar 19, 2011 16:37:26 GMT -6
Update : I torqued down the head nuts as recomended . Was 18 ft/lbs too much ? I also adjusted the valve gap space on the rocker arm assembly . It was well over .007 before I did the adjustments to .005. The rocker arms were a tad bit loose ( most likely reason for the chatter I was getting). Tomorrow will be the big test. Im going to ride to a near by town and back and will be checking my spark plug incase I need to adjust the carb. The head nuts did need the adjustment aswell. Now if only the weather would be more cooperative !
Bill C.
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Post by Kaveman on Mar 18, 2011 18:26:48 GMT -6
Panic averted ! Thankyou !!
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Post by Kaveman on Mar 18, 2011 18:11:21 GMT -6
>:(I am looking for a clear photo showing exactly where the flywheel timing mark is supposed to line up with the mark on the outer crankhousing !! I checked google and found nothing that showed me what I am looking at ! I have a 150cc 157qmj . Am I supposed to line up the timing mark at the F marking or T marking on the flywheel ?
Bill C.
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Post by Kaveman on Mar 18, 2011 17:30:06 GMT -6
One more quick question.looking at the side of the flywheel (going clokcwise) is a line then a T F and another line . TDC is the line before the T ?
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Post by Kaveman on Mar 18, 2011 17:14:05 GMT -6
I'll try the torque wrench option first. I may still run the a9 cam to see what performace upgrade if any is happening . Would a 59mm cylinder upgrade help ?
Bill C.
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Post by Kaveman on Mar 18, 2011 16:54:43 GMT -6
My scooter is once again running after being torn down most of the week. The cylinder base gasket (one inbetween the cylinder assy and crankcase) is leaking. Do I replace now or try oil stop leak stuff ? 2 local shops have the gasket that would be needed. It's not drip drip drip but anoying none the less. Any suggestions would be much appreciated.  Bill C. |
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Post by Kaveman on Mar 17, 2011 17:22:38 GMT -6
The end of throttle cable ! Oy!
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Post by Kaveman on Mar 16, 2011 19:38:17 GMT -6
Needed asap: torque specs for head assembly nuts ! ( to tighten 4 nuts atop the valve rocker arm assy ) 157qmj engine
Bill C.
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Post by Kaveman on Mar 16, 2011 18:45:13 GMT -6
Property manager forced me to get scooter running immediatley or face getting evicted for having scooter apart in the parking lot. There simply isn't any time to get case machined now. I'll have to stick with an almost stock engine with an a9 cam for a couple more months . The plan now is to buy a machined out case and build a new bigger engine to my specs as funds permit. It has been a good learning expierence . Now I understand the engine's mechanics and what's needed to build a new engine. I have the cylinder and new piston to start the project with atleast ! Bill C.  |
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Post by Kaveman on Mar 14, 2011 22:10:57 GMT -6
Does anyone have a gy6 bigbore case boring tool one could borrow or rent ? Only needed for one crankcase set. Any help would be much appreciated.
Bill C.
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Post by Kaveman on Mar 13, 2011 20:59:00 GMT -6
Welcome to the forum !! Is the engine kill switch off ? Next I would check for spark. Thats where I would start. There are a bunch of good knowlagable scooter "nuts" who can help you get to the bottom of this quickly !! I have been learning quite abit from them. Just keep asking questions! Even if they are small ones. I am actually rebuilding my scooters engine right now. I'll keep my reply short ! Good luck !
Bill
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Post by Kaveman on Mar 10, 2011 20:35:16 GMT -6
My main issue is which one to use ? high temp ultra copper , blue , black .
BillC.
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Post by Kaveman on Mar 10, 2011 17:32:23 GMT -6
Any suggestions on what gasket sealer, maker or goop to use on my gaskets to seal them up when they get installed ? 157qmj engine .  Bill C. |
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Post by Kaveman on Mar 9, 2011 9:20:28 GMT -6
Thankyou !
Bill C.
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Post by Kaveman on Mar 8, 2011 19:28:36 GMT -6
flange nut question . What is the threading on the variator side on the crankshaft? Is it a special threading or can I find a metric nut that wll work ? I bought a flange nut locally but it doesn't fit . Any help would be much appreciated !
Bill C.
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