Giving up!!!

Motocruiser

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Local time
9:13 AM
Joined
Mar 6, 2011
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Location
kansas City
You can check out my post in 2 stroke engines, "upgraded now it won't start". After hours of trouble shooting I'm giving up on this engine. I've got over $2k in this bike and can't afford to keep throwing parts at it. I've got good compression, but can't seem to get spark no matter what I try. I've replaced the CDI, magneto, plug, and nothing works. So frustrated with this build. It's got a 100 miles on it. I honestly thought it would have atleast lasted through the summer.
 
did you check for spark? if thee is any spark at all, try taking off the carb and start it. if it is flooded it will start and burn of all of the gas.

how did you spend $2000
 
Sometimes just as easy to step back for a breather ... easy for me to say:eek: ... but give yourself 30 days and come back a little refreshed .. I do it and works every time.

Rick
 
how did you spend $2000

I don't think that I've spent $2000 myself, but I know I've spent a LOT more than I would have expected for "$200 engine and a bike".

It's real possible he started with a really nice bike and upgraded with heavy duty wheels and such...
 
$2000 is a good bit, alright. I've bought a pre-built MB shipped to my door, upgrade parts for it, a replacement motor/gearbox, a 29'er with flip-flop hub, a R/S eho35, a Mitsu TLE33, a Nuvinci hub, and -- recently -- FIVE "hornless" seats to test, of which I will likely return 3 or 4 of them. After all that, especially after returning the unwanted seats, I will still be under $2,000.

As for answering the OP's question. I have a problem with my magneto/CDI. While scouring the web, I saw an electrical engineer's response to a non-sparking engine. The response suggested that the magnets on the flywheel were worn out. Seems reasonable to me that this is your problem, if you've replaced everything else that creates spark...
 
Most likely is a bad ground connection at the magneto. Without that then there is no ground path for the ignition coil. On a motorcycle the ignition coil is grounded to the frame, as is the engine. But not so on this engine.
Grind the contact areas with your dremel or sandpaper. There is shelac that needs to be removed there.
If still no spark then see if there is AC voltage at the two wires coming from the stator coil. If I remember right it should be around 50 volts at moderate walking speed.
If it's there then you replaced one crappy chinese cdi/coil with another crappy chinese cdi/coil. From my testing they barely produce enough voltage to spark and so any reduction in performance, for whatever reason, reduces the sytem to a non-functional status. I replaced everything but the stator coil with quality parts a long time ago. I can't believe anyone puts up with this extremely weak link in the system.
 
giving up

check the wire off the top of the coil that is soldered to the coil frame- THAT's where many folks have an issue. **** near gave it up myself this spring untill I revamped that connection. I d/c'd the ground wire off the coil frame, pealed back 1/2" of insulation back of the connector and soldered THAT to the coil wire before I bolted it to the adjacent bolt hole- THAT way, the ground wire is solid to the coil while the frame connection is incidental, not the other way around. Replacing the magneto- the issue I'm describing is common enough that you might have bought the same problem. It does mean that the black wire now goes out with the magneto should you replace it again, but I doubt this will ever be an issue.
the ld Sgt.
 
one question is your white wire hooked to anything or touching any thing at all
 
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