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Post by son10s on May 24, 2011 12:18:05 GMT -5
:sos: My bike, a 2007 Yamati Eurosport RX50 which has no manual on this planet, was running excellent and one day sputtered and stalled. I added Sea Foam, guessing it was bad gas. That didn't help so I cleaned the carb, blew pressurized air, looked for leaks, etc. I have never worked on anything in my life but I don't live near anybody who can help and this is my transportation so I really need help! After many hours on forums and Youtube, I finally narrowed it down to the throttle cable. I was experimenting adjusting that and the idle and the air mixture screw [this was before I learned some things] and trying to start it every 5 seconds when suddenly, nothing but a click from the electrical start. Well I hauled it inside and put the battery on a charger overnight and the next morning the starter turned over once and then the next time, nothing but the click. Used a circuit test light on the battery. A couple times both posts checked out, the last time, only the negative. Then I laid a screwdriver across the solenoid(?) and it tried to start. I also tried to kick-start it and it would only try one time, then nothing. And I examined the spark plug, an NGK but it looked a little dirty so I cleaned it with a wire brush. Checked for spark on ground screw and got nothing but holding it there and trying the electronic start again, it tried to turn over twice but I stopped because obviously gas came out and I am working on a tarp in my condo.. The battery seems to get weak pretty fast. Could all this be the result of a weak battery and poor spark plug? On the plus side, I did lube the throttle cable and now the slide works just fine! Any ideas on this starting issue? I am working on it now..
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Post by Thebatman on May 24, 2011 12:34:34 GMT -5
Your on the right track.... Oh BTW :welcome: to the forum.... I would swap out the plug 1st and check your frame ground wire. Then see if you have spark. Check all the connections to make sure they are making contact.add a touch of "dielectric" grease to them(or some wd-40 i have used it too). After that, if you still have nothing you need to check out the coil, cdi, then the stator... There is a good "how-to" in the tech. library that'll cover each of these items... Hope this helps youo in some way... Keep us posted on your results... :cheers:
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Post by 90GTVert on May 25, 2011 8:37:42 GMT -5
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Post by son10s on May 27, 2011 23:42:07 GMT -5
WELL..thought i had a battery and spark plug coming but my pal was in such a hurry to go on vacation, he forgot to snag them. so i am stuck like chuck for now. asking myself, how could the battery go bad so suddenly? i did notice it was slow to crank when i ran my lights but the bike/battery is only 4 years old. Powersports YXT7L-BS. spark plug was pretty dirty but it is a NGKBP7HS and i cleaned it with a wire brush.. victories: learned how to clean my carb and lube my throttle cable and adjust my mixture and idle. challenges: i don't recognize the electrical parts (except my battery) because they look different from pix i see on forums and videos, my wires are all sealed together beyond a few inches of their origins making it tough to know if anything is broken, i cannot get further into the body other than cutting the side/bottom cover off the pedals in order to even get to the spark plug, i don't have a multimeter, and the Autozone guy says his testing machine is broken.. questions that gnaws at me: what things need to be "grounded"--could i have inadvertently moved something when i pulled the seat out with the wires still going through it to the battery? my continuity test light lights up for the negative but not the positive..and whatever it is called that my battery positive leads to, where is it supposed to sit? is it ok to just be hanging underneath the seat? on that subject, i have a floor panel i removed hoping to get to the spark plug and there is a rectangular flat box with what looks like an antenna attached to a small box and a covered sleeve of wires and oh god, why did i ever open that pandora's box?? now i don't see how to logically place them all back in without smushing something? and finally, is there a way to bring my battery back to life--if i left it on the trickle charge for a day or two, for instance, is there any point? thanks for all the encouragement, Gang!
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Post by 90GTVert on May 28, 2011 6:31:42 GMT -5
4 years for a little Chinese battery isn't a terrible lifespan IMO. Also, batteries do just go bad overnight at times... or at least they get to a point where we notice them being bad suddenly. I had a charging system that wasn't working and it took a week of electric starts and running a battery powered accessory before it was really weak starting one day. I never noticed anything before that. You said you don't recognize electrical parts. Have you looked through the thread I linked to above? I have pics there of some components from various scooters. If you are trying to check wires, worry about what's not wrapped/covered first. The unprotected wires are the most likely to get chaffed or whatever. Just checked the wrapped portions for any evidence of damage and unwrap that area if it looks like there may be an issue there. There is usually fairly large ground wire from the battery to a grounding point on the frame and on the engine. The large positive cable from the battery likely leads to the starter relay. Nothing should really be just hanging around unsecured, but if you are working on the scoot, as long as the connections are secure and not touching anything and grounding out, it should be OK to hang there. What did you test for positive power? Your test light should light up if you connect it between the terminals of the battery. If you hook it to ground and then probe the starter relay's 2 large connections one of them should light up at all times. The other should light up if you are trying to start the scoot. If the scooter is cranking over though, all of that should be present so you don't really need to check for power there. If the box looks like it has an antenna, I'd guess that's an alarm. You can see a typical Chinese scooter's alarm here... 49ccscoot.proboards.com/index.cgi?board=igneleclight&action=display&thread=386Just take your time and you'll figure out how to get the wires back in and everything back together. If you haven't gone through the thread I linked to earlier, do so. I feel it will be useful.
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Post by Goosey on May 28, 2011 8:03:58 GMT -5
What Brent said on the battery. Once they get too week you really can't bring them back to life. I would replace the battery and I would get another NGK spark plug. I have a battery that sounds like it is working hard enough, and can be used to run my air pump and emergency impact, but it can not start the scooter. You can probably get the battery at AutoZone, and ask about the spark plug. My local place didn't have the plug but ordered it in a day, $3. Don't cut any body panels Each scooter is a bit of a puzzle, and you may have to learn how to comletely remove all the plastic to get to what you need to for a good tune up. Just take your time, and have a good place to lay everything out, I use masking tape to keep screws and parts together, and when I started doing this stuff I labeled the connectors and the parts with tape and a marker, so I could put it back the same way. And welcome to the forum Also, if you are still getting just a click, the first thing to check is the relay, this is the part the red wire goes to from the battery. looks like this, www.amazon.com/Chinese-50-250cc-Scooters-Motorcycles-Go-Carts/dp/B003XMMU4GFirst this should be screwed down somewhere along the frame, hope that's not what was floating around somewhere...check the connectors to and from this first. Then if it looks ok, with your key on and your kill switch to start, cross these two poles with the metal part of a screwdriver :zap: don't touch the metal ... if this part is bad it will fire up when you do this, but just click when you use the start button.
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Post by Thebatman on May 28, 2011 8:18:52 GMT -5
Plz correct me if i am wrong, but it seems that those cheap chinese alarms to go bad and cause alot of headaches.. I would unplug that while i am testing things out.
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Post by son10s on May 28, 2011 10:53:27 GMT -5
What Brent said on the battery. Once they get too week you really can't bring them back to life. I would replace the battery and I would get another NGK spark plug. I have a battery that sounds like it is working hard enough, and can be used to run my air pump and emergency impact, but it can not start the scooter. You can probably get the battery at AutoZone, and ask about the spark plug. My local place didn't have the plug but ordered it in a day, $3. Don't cut any body panels Each scooter is a bit of a puzzle, and you may have to learn how to comletely remove all the plastic to get to what you need to for a good tune up. Just take your time, and have a good place to lay everything out, I use masking tape to keep screws and parts together, and when I started doing this stuff I labeled the connectors and the parts with tape and a marker, so I could put it back the same way. And welcome to the forum Also, if you are still getting just a click, the first thing to check is the relay, this is the part the red wire goes to from the battery. looks like this, www.amazon.com/Chinese-50-250cc-Scooters-Motorcycles-Go-Carts/dp/B003XMMU4GFirst this should be screwed down somewhere along the frame, hope that's not what was floating around somewhere...check the connectors to and from this first. Then if it looks ok, with your key on and your kill switch to start, cross these two poles with the metal part of a screwdriver don't touch the metal ... if this part is bad it will fire up when you do this, but just click when you use the start button. YES, THAT IS EXACTLY WHAT HAS NO APPARENT HOME! and i did the screwdriver test--it did attempt to fire. however, when i have had my battery on the charger overnight, the electrical starter switch will attempt to fire once and then click the next try. so i am hesitant to think the relay is bad, just maybe i don't have it settled in the right location?
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Post by jmkjr72 on May 28, 2011 13:28:03 GMT -5
that should just sit on a spot on the frame either a little lip or a rubber style mount should hold it in place if it is that style that is pictured
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Post by Goosey on May 28, 2011 16:10:57 GMT -5
The relay can come and go if it's bad. Crossing it with the screwdriver only bipasses the workings of the relay. If it is clicking (even only sometimes) when you use the start button, but trying to fire with the screwdriver, replace it. You need to find out where it is supposed to be attached though. If you replace it you need to atache it to the frame. Mine are on the lower, right side, kind of toward the front area under the seat.
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Post by Fox on May 28, 2011 18:04:22 GMT -5
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Post by son10s on May 29, 2011 8:00:31 GMT -5
4 years for a little Chinese battery isn't a terrible lifespan IMO. Also, batteries do just go bad overnight at times... or at least they get to a point where we notice them being bad suddenly. I had a charging system that wasn't working and it took a week of electric starts and running a battery powered accessory before it was really weak starting one day. I never noticed anything before that. You said you don't recognize electrical parts. Have you looked through the thread I linked to above? I have pics there of some components from various scooters. If you are trying to check wires, worry about what's not wrapped/covered first. The unprotected wires are the most likely to get chaffed or whatever. Just checked the wrapped portions for any evidence of damage and unwrap that area if it looks like there may be an issue there. There is usually fairly large ground wire from the battery to a grounding point on the frame and on the engine. The large positive cable from the battery likely leads to the starter relay. Nothing should really be just hanging around unsecured, but if you are working on the scoot, as long as the connections are secure and not touching anything and grounding out, it should be OK to hang there. What did you test for positive power? Your test light should light up if you connect it between the terminals of the battery. If you hook it to ground and then probe the starter relay's 2 large connections one of them should light up at all times. The other should light up if you are trying to start the scoot. If the scooter is cranking over though, all of that should be present so you don't really need to check for power there. If the box looks like it has an antenna, I'd guess that's an alarm. You can see a typical Chinese scooter's alarm here... 49ccscoot.proboards.com/index.cgi?board=igneleclight&action=display&thread=386Just take your time and you'll figure out how to get the wires back in and everything back together. If you haven't gone through the thread I linked to earlier, do so. I feel it will be useful. [/IMG] ok, finally found some batteries, for my camera, [/IMG] , and so you see my relay is attached to a metal cylinder. the good news is, i finally located a pocket it sits in out of the way. it was dark and basically camouflaged before so i could not see it when it slipped out. now for the other news: took your advice about the spark plug and went to Autozone. i had a NGK BP7HS and they said they had it, it was in a little box, i paid for it and went home. turns out, they gave me a NGK BPR7HS! called the guy and told him i am coming in today before he gets off at noon. my question is, what if they don't have the exact one? would i be better off keeping this one than getting a Champion equivalent to the BP7HS?? [/IMG]
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Post by Fox on May 29, 2011 9:26:51 GMT -5
The R just means it's a resistor plug. It's okay. All relays are metal like yours. They come with a rubber sleeve as pictured in the link below. Some people call it a solenoid but its really just a heavy duty switch. The start button would melt with all those amps so it triggers the relay and the relay closes completing the circuit to the starter motor. When you touch metal to the poles you complete the circuit yourself effectively bypassing the relay. The key doesn't even need to be turned on. www.pccmotor.com/relay-solenoid-honda-yamaha-dirt-bike-atv-crf50-5505001.html
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Post by Goosey on May 29, 2011 10:25:12 GMT -5
NGK is what I always use and see most recommended. Once the relay is in there where it goes double check the connections, maybe it was just loose from wobbleing around in there, or touching something else. Even a bad battery will usually try and turn over the engine more than one shot, so if it's still clicking this place is reliable for common parts and you usually get them in 3 days, also carries batteries if you need that. www.scrappydogscooters.com/COMMON_PARTS.htmlIf you need one faster, I bought my scooter battery in the Wal-mart in the auto department, though they are closer to $50-$60 there. I suppose wobbling around in there could cause the relay to eventually fail, I know mine did last year after the scooter had a tree land on the seat and gave everything a good jolt
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Post by jmkjr72 on May 29, 2011 13:14:20 GMT -5
you should be running a bpr7hs unless you have a nolgy hot wire or one of the other after market wires that have the resistor in it
with the cdi systems you realy do need a resistor plug
and the last champion equilvalnt i bought to fix a scoot becuase no one had the ngk in stock wouldnt work becuase the tip would not screw off
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