Post by krotch on Sept 20, 2011 8:02:37 GMT -6
Recently my wife's Jonway had some trouble. First off, the scooters been strange from the start. We ordered a 2008 Roketa MC-54b for about $2000 from killer motor sports. (right now they sell for about $900 at Waco Motor Sports) <---NOT a drop shipper, but a real live motorcycle dealer. What we got was a 2011 Johnway yy250t with mp3 player, and a cfmoto engine. Every part on the thing claims March to May of 2011. We really wanted the bigger engine, but hey you win some you loose some. Anyway we had some charging problems, not really unexpected, but about two and a half months into ownership she noticed a strange rattle. At first I though it was the air filter (the screw tab had broken off, and it has been just kinda sitting in the air-box). Well about two weeks ago she has me listen to it and there was indeed a rattle coming from the crankcase on the right side. She revved it up a bit and suddenly we hear a sound that can only be described as a loud KA-CHUNK. At this point the noise completely disappeared and the engine sounded fine again. She's also been having a weird noise when she goes to start the thing, so three days later the weekend hits and I decide to crack open the crankcase and check to see if the starter motor is stripped. (The weird starting noise sounds kinda like a striped gear, but it still starts fine.) When we cracked the case what we found was kinda shocking. One of the stator screws had not been tightened properly at the factory and had been getting hit by the screws on the magneto/flywheel (Thus the rattle). The KA-CHUNK was the sound of the screw getting ripped out of the screw hole. It the proceeded to tear the metal sleeve off of the magneto and shred the magnets and the stator wires to bits. Long story short, this factory defect cost us about $130 after parts and tools. Magneto/stator and impulse from buggypartsnw.com and a $20 gear puller set from harbor freight. Lots of fun replacing it all though 
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The reason for this post is two-fold. First, I took pictures and would be happy to post a walk-through of the replacement process. (I never found one online) Second, while in the crankcase It sounded like the starter noise was coming not from the starter, but from the transmission area. If anyone might know what would cause such a noise, I would be very grateful to hear. (From what I've seen, most of the transmission gears only cost about $25 and I'd like to fix it before it messes more things up.)
Oh, and as a nice bonus, after replacing the charging system, my wife's brakes lights, which had been frighteningly weak before, now shine as bright the led lights on my Yamaha Majesty, and of course no more battery drain issues.
.The reason for this post is two-fold. First, I took pictures and would be happy to post a walk-through of the replacement process. (I never found one online) Second, while in the crankcase It sounded like the starter noise was coming not from the starter, but from the transmission area. If anyone might know what would cause such a noise, I would be very grateful to hear. (From what I've seen, most of the transmission gears only cost about $25 and I'd like to fix it before it messes more things up.)
Oh, and as a nice bonus, after replacing the charging system, my wife's brakes lights, which had been frighteningly weak before, now shine as bright the led lights on my Yamaha Majesty, and of course no more battery drain issues.
