sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 12, 2011 20:00:58 GMT -5
took off my head and did some porting work to open up the intke n exhst ports for alil more breath thru the scoot! after reinstallation, nothing! timing is dead on, got spark, what could the problem be!  |
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 12, 2011 20:20:43 GMT -5
FREAKIN HELP!!!!!!!!!!!
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Post by Fox on Mar 12, 2011 20:27:22 GMT -5
Maybe the timing is 180º off? Try removing the spark plug and rotating the engine with your finger on the plug hole to fell compression and then check if the cam is aligned when the T mark comes around.
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 12, 2011 20:53:54 GMT -5
appreciate that!! we are talkin bout my sweet lil aggravating QMB 139!! i thoght with a 4 stroke ,as long as the "t" mark lined up on the case and the camhole line up with the top of the head it is timed right ! so 4 strokes can be 180 out?
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 14:04:46 GMT -5
not the problem Fox ! Helpppp!!!! it wants to start but just won't do it!! HELLPPPP!!!
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 14:19:15 GMT -5
you know what? i think the fly wheel might be out of index slightly! when i tootsie rolled my woodruff key it slightly enlarged the area where the key goes into the crank ! could the slight, very slight, enlargement of this area be the culprit? the "T" mark still lines up at the highest point of piston travel in the bore!
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Post by 90GTVert on Mar 13, 2011 14:59:41 GMT -5
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 20:04:44 GMT -5
yes i have and it was too much air not enough fuel!! got it running ,"like a dog",but running! I cracked the head where the two eight mm. bolts go to hold the side where the cam chain and tensioners are oil was shootn out the crack when i revved it ,so I took it apart and put some steel JB Weld on the inside and out side of the crack,we'll see how she does!! yep,that porting opened it up right much so the air fuel mix had to be readjusted and had t raise the needle to fatten it up just alil bit! so far it is responding ! done for the night !! i been at the thing since noon!!
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 20:12:41 GMT -5
oh and i put one of those Naraku, aluminum phenolic carb spacers on it too! they said it was for the QMB139 ,but it was so big the rubber ring wouldn't seal to the intake port. my stock rubber ring on the stock intake broke so, i made two high temp cork gaskets ! set them up like this, gasket on the port, naraku spacer,gasket, then intake on top! no leaks ! raised the height of the intake approximately 3/8 of an inch ! what effect will this have?
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Post by 90GTVert on Mar 13, 2011 21:38:16 GMT -5
It probably won't have much effect at all. If it were going to do anything, the longer intake would probably slightly increase low end power.
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 21:39:05 GMT -5
thanx that is what i was hoping!
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 13, 2011 21:41:19 GMT -5
OH BY THE WAY THANX TO ALL OF YOU GUYS FOR THE HELP ! BRENT, THANX FOR STARTING THIS FORUM ! i REALLY ENJOY THIS !
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Post by 90GTVert on Mar 13, 2011 21:45:55 GMT -5
Thanks for joining. We're glad to help.
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sctrdawg
Scoot Enthusiast
scooter bum
Posts: 149
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Post by sctrdawg on Mar 14, 2011 9:48:33 GMT -5
alright guys i'm bout to got see if my handy dandy JB Weld cracked head repair worked!! new flywheel comes today! wish the guys at scootertronics would get my order shipped ! ordered on the 25th of FEB!! ssssslllllooooowwwwwtertronics if u ask me!!!
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Post by 90GTVert on Mar 14, 2011 10:02:41 GMT -5
I've got my fingers crossed for you. It's really hard to type now.
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