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Post by billw129 on Apr 12, 2011 21:55:54 GMT -5
well I just got my internet back on today so I have not been here in a while either. I agree about the biggest piece of junk i have ever bought thing. My motor heated up so bad that the plastic melted to the head and the cylinder and piston are scraped as well. So now I need a stator, Piston, Rings, and cylinder bore. I will just stick with my 50cc for now. I dont know how scrappy dog scooters has a good name selling junk motors and not backing them up. My scooter idled great as well and would run like total crap with a little burst of power every now and then. Oh by the way the piston cylinder and crank were well coated in oil so it was not like I ran it lean.
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95ej2
Scoot Member
Posts: 31
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Post by 95ej2 on Apr 14, 2011 21:49:14 GMT -5
Bill, did Scrappy every reimburse you? Were you able to return it? *Update* I was trying to fix my problem of no spark so I ordered a new CDI and Coil. Replaced those and when I was turning on the scooter the inline fuse blew... Replaced it and it blew again, so now I am in the process of tracing a short. *Edit* Fuse problem is solved, but still no spark. * New CDI * New Coil What else is correlated to spark? The stator? If so the stator is as new as the motor I just bought. I JUST WANNA RIDE THE DAMN THING ALREADY!!! I mean I have a real bike, but this would be fun if it ever got running  |
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Post by 90GTVert on Apr 14, 2011 23:09:34 GMT -5
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Post by Goosey on Apr 15, 2011 8:05:51 GMT -5
The stator that came with my new engine a couple years back was not compatable with my electrical...plugs matched, but it blew my lights out, swapped with old stator all was good.
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95ej2
Scoot Member
Posts: 31
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Post by 95ej2 on Apr 15, 2011 13:47:09 GMT -5
Well, my old stator is hidden under a welded nut, so i have to get that out first to even see if the old stator is salvageable.  Brent your trouble shooting thread is epic thanks once again! I will surely donate once I get some extra money! Currently I am stuck on step 11.  Need to borrow some feeler gauges from car friends to verify. |
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Post by 90GTVert on Apr 15, 2011 14:07:49 GMT -5
Did I miss something? Why is the flywheel nut welded on? I would be very upset if the shop did that. Once it's off, you're going to need to run a die over the crank to repair the threads and get a new nut.
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95ej2
Scoot Member
Posts: 31
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Post by 95ej2 on Apr 15, 2011 15:24:55 GMT -5
No, you didn't miss anything. That was off the original motor as soon as I saw that I knew rebuilding it was out of the question thats why I went with the scrappydog motor assuming it was bolt in and ready to go...
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Post by 90GTVert on Apr 15, 2011 17:43:15 GMT -5
Ah yes, now I see. You said "old motor". Sorry.
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Post by Goosey on Apr 16, 2011 22:03:31 GMT -5
LOL, I do not envy you the joy of getting to that stator. If you are checking the gap, a standard business card is about the right thickness.
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Post by jmkjr72 on Apr 16, 2011 22:51:07 GMT -5
you should be able to chisel most of that weld off i would think
they shouldnt have been able to get it hot enough to get good penetration on the crank without melting the nut away
and what doesnt chip off have at with a dremmel
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Post by billw129 on Apr 17, 2011 16:58:40 GMT -5
No they never reimbursed me. they told me that If I found the exact problem then they would fix that but I could not return the motor. Being as though I can not afford to send it to a shop (even the shop couldnt fix it in your case) And the motor doesnt run. That ends my trouble shooting. It is now a paper weight on my bench at work. On the plus side after messing with that thing for so long and it running so bad my old 50cc seems like a rocket ship.
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95ej2
Scoot Member
Posts: 31
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Post by 95ej2 on Apr 18, 2011 16:44:38 GMT -5
^ Well that sucks, so I assume it's a lost cause for you? Do you want to start a thread to warn others not to buy the POS motor? I read their return policy and it mentions once you take on installation it's no longer them responsible... I mean if its the stator in my case I would atleast want them to reimburse me for that, but who knows I'll be happy once its running!
*Update* I used an angle grinder and shaved away the metal welds and took the nut off. The reason for the nut being welded in the first place was cause the crank threads were completely stripped. So the previous owner obviously did know how fuct this scooter was.
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Post by 808kwg on Jul 2, 2011 6:29:40 GMT -5
Howzit guys ! .. I had the exact same problem with that motor when i tried to put it in a CPI mako. I had to take the stator out of the old 50 block and put it into the new engine. apparently the motor wires nicely to the yamaha jog90 but my chinese knock off had a different rectifier. 2 options here ; re-wire the bike or change the stator  the hardest part was finding a flywheel puller tool that is the right size to pull the stator, after that everything worked fine... does an easy 50 about as fast as a car would take off from a stop light. |
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Post by 90GTVert on Jul 2, 2011 6:46:25 GMT -5
Thanks for that info, and :welcome: to the forum!
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mccanic
Scoot Enthusiast
Posts: 254
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Post by mccanic on Jul 2, 2011 13:58:37 GMT -5
me and mr clean (brother) both bought a 100cc engine from scrappy and they both looked used? im still recovering from a car crash so i haven't put mine in, but my brother has and his is idleing fine and but once you give it gas it bogs out. we have tryed every jet he has all do the same thing? idk im starting to think its crank seals? idk.
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