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Failure is the greatest teacher... and I'm learning fast. "Fail faster!"
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Joined: Apr 8, 2014 23:16:54 GMT -5
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Post by outbakjak on Apr 10, 2014 11:08:59 GMT -5
So I finally got my baby running again after purchasing a defective stator, however, same problem of not making it over 30MPH. Before I changed the first stator to fix a charging issue, I could hit 45 on flat ground. I assumed it was the used stator that I installed causing some type of electrical problem, so I purchased another, but to no avail.
Interestingly enough, she seems to be accelerating better, but I still can feel the engine "missing" (brief losses of acceleration maybe once every second). The spark still looks weak, and kind of jumps left to right and the spark intensity is fluctuating.
SO, I got a timing light from Harbor Freight to rule out a timing problem, and the flywheel is looking perfectly aligned, at half throttle the advance stays between the last two lines after "F", looks good to me. I'm no expert but from this my loss of speed doesn't seem like a timing issue. Could be sliiightly off, I don't know, but
...considering the weak spark (which I thought to be caused by the stator, ruled that out at this point), and the long list of known electrical problems on this scoot, I'm wondering if it's possible that the coil isn't getting enough power, if there's an electrical issue causing it? The spark plug is new, but older than my speed loss problem, therefore not a likely culprit.
I'm going to start off my day by putting a meter to the ignition coil.
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Post by jjoshua20213 on Apr 10, 2014 11:23:47 GMT -5
Try a spare cdi. A failing one act just the way you described.
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New Rider
Currently Offline
Failure is the greatest teacher... and I'm learning fast. "Fail faster!"
Posts: 15
Likes: 3
Joined: Apr 8, 2014 23:16:54 GMT -5
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Post by outbakjak on Apr 12, 2014 23:15:52 GMT -5
OK guys, so I feel pretty stupid! I should have thought of this the first time I changed my stator and a broken flywheel key fell out, my timing is WAY off! SO it seems, that when I installed my first replacement stator, and I (like a total n00b would do...) pounded the flywheel back on way too hard with a mallet to make sure it was well seated, and cracked the woodruff (flywheel) key. This caused my flywheel to go out of alignment, messing with my timing, I think, lol. So, the broken woodruff key has been GRINDING down the metal on, not only the flywheel, but on the cheap stock crank as well! Now, after purchasing a new woodruff key, the metal is ground down so bad around the slot where the key sets on the crank, that it's not doing it's job, the flywheel is slipping further and further still. Timing or electrical? I think timing! I guess I really don't know what to look for when using my timing light, and a few degrees off makes a huge difference. Looked right to me, but I knew I couldn't be sure. That's what I get for not doing my research. So I'm gonna make a trip to my local junkyard that just started carrying scooters, and try to pull myself a new (used) crank, hopefully this fixes my problem. Man, I love my scoot, but it's giving me a month long headache. Purchased for $400, registered for $200, and $150 more in parts and service later, it's still a piece of junk . Here's to hoping that I get this baby back on the road soon! -Outbak
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Post by william42 on Apr 18, 2014 8:25:30 GMT -5
Just a thought. JB Weld is some good stuff. I have a common problem on machines that I maintain where the keys wear and wears away at the key slot in the motor's Rotor shaft as well. I've had some success cleaning out the key slot really good then filling the slot with JB weld, inserting the key then cutting away the excess JB compound. This method might work for your application as well and it's a whole lot less work then replacing your Crank Shaft. The key is only holding the flywheel in place and there's not a lot of torque applied to it while the flywhell is spinning so it might be worth a try.
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Post by jjoshua20213 on Apr 20, 2014 7:45:06 GMT -5
Oh, yea thats your problem. If the flywheel is not aligned, the pickup coil fires at the wrong time, thus the timing problem you have.
The flywheel goes on easy but comes off hard. If you had to hit it to get it on something was wrong from the beginning. It just slides into place and the magnets keep it on before you put the bolt back on. Did you notice it broken from the beginning, or just recently? A new key cost around $2 or less and could have prevented this.
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Post by wutzthedeal on Apr 22, 2014 0:32:08 GMT -5
I'm in the same boat re: top speed. And I've just about replaced everything; last thing I'm doing is putting on new variator and sliders (taking 7g dr. p to 9g), replacing spark plug again, and finally getting my rear tire replaced (I've had the new tires for almost a year, just getting around to replacing them). I'll post an update on what ultimately fixes it.
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