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That is what i did for my wife. I bought one on eBay. Paul

Thanks Cruiser!! I can not believe that was it,but it was. I had tightened them up before and there was no difference . I hated to cut the wires and put new connectors on them. I did and now those wires that were getting hot are not .There is a little warmth near the rectifier on the yellow wires but not much. I added a small CPU 12 volt fan on the rectifier. It is running cool now. Sorry for not listening ! I should have known better. Thank you again. Pw

I have a 250b Yamaha clone. There are three yellow that come out of the rectifier go to a plug that has wires that go to the front of the scooter. Those 3 wires are very hot. They will sooner or later burn up. There are 4 wires that come from the stater. 3 are yellow one is blue. They are not hot. I have checked the plugs to make sure their tight. So a loose connection is not the problem. I believe i have a short some where up front where the yellow wires are going. all the diagrams i have found do not show where the yellow wires from the rectifier are going. The two sets of 3 yellow wires from the back ,the ones going to the rectifier and the ones that go to the stater have the same style plug. In other words you can plug either in to the other. When you change them you get the same results. The same 3 yellow wires get hot. I have been having a problem of no power . The scooter was running 70 to 75 then dropped back to 45mph and would run no faster. I believe this problem i found with the rectifiers getting hot is causing this problem. I thank the 12 volts is being robbed by the short. Anyone had this problem or have a good wiring diagram that shows all 6 yellow wires and where the should go? Thanks Paul

If you find a crack on the intake manifold instead of replacing it go to the nearest place like ( Yamaha dealer) and buy grey yamabond gasket maker . Put that on it it will set up like rubber and last a life time. It is one of the best gasket makers out their. Someone may know another name for the same thing.

Now to my trouble on no power. I was checking all plug and tightening them. Noticed that the 3 yellow wires coming out of my rectifier were really hot. I checked for loose connections at the plug. These 3 wires go to the same plug. They leave there and go to the stater. All three wires a hot. Is this normal. I thought i might have a rectifier going bad. I did a meter check at the battery a little over 13volt dc I revved up raised to 14volt dc. I have had rectifiers start to go bad an still read right on dc scale but when you switch your meter to ac the rectifier is starting to go bad an has ac voltage going out to your system. At first you want know it with out checking . The you will start having things happen. It will ruin your battery and almost any dc unit on the scooter. You should not have over .002 ac volts when you read ac on the dc system. Your stater is putting ac volts out, the rectifier converts that to dc volts . I hope this helps anyone having electrical problems that are weird. By the way mine was OK. But the three yellow wires are to hot. Thanks for any help Paul

My 250 is running better. I can get the rpm now. The vacuum hose that comes from the vacuum canister to the air box had cracks in it . I cleaned the breather filter and put filter oil back one it. Also the large pipe that hooks to the carb and is molded to air box and is sealed had cracks in it .I sealed with Yamabond grey. I believe i have mine repaired. I will have it back to gather this week some time and we will see for sure .Thanks everyone .Paul

OK got the bike back together enough to crank it. It ran OK till choke went off . Then i had to set the idle and it seem to be idling a little rough. I thought it might have a vacuum leak so i sprayed ever thing with water. No change. When i revved the motor up it didn't want to go up to rpm. It would stumble at about 45 hundred rpm. I had changed antifreeze and i noticed the gauge was running to hot. revved motor it went up to 6000 fast. I cut it off and let it cool. Checked coolant level and add some. I cranked it up ran like a dream all of a sudden after i revved it to 6000 it would not idle again had to move idle screw for a smooth 1500 idle. Cut it off let it set ,cranked ran perfect. Still to hot. How do you know when you have all the air out of the cooling system? And what is the best way to get the air out. Also i noticed that when i revved the motor up the temperature gauge would fall and when let off the gas go back up. Any ideas? At least it will go up to rpm up some times!! Thanks in advance Paul

I have 14gm doc slider sliders coming a new spark plug and a new fuel filter. I decided to put new gas an vacuum lines on it. Looking at his plug ,i thought it looked close to perfect am i wrong. My plug looked about the same. I almost forgot I'm putting a new gates belt on it. Thank you JR I will check my compression. I really don't believe that there is a problem there. I can't wait to get it back together . I may be wrong but i think the valves loosened up. They we real loose. I will post what i find if anything . Jr That is a good idea . I may do my manifold the same way. If i ever take the head i will port and polish the intake an the exhaust. That will help it breath better . Thanks again Paul