starting issue 2012 tat tao VIP 50cc to BB80cc By Tawas (Read 647 times)

[Tawas]

have a starting issue ..with no battery charger on will not start ..BUT..will start with battery charger on?? heres what I checked and changed.. new CDI..spark plug..coil..valve gap set .004 both..pulled flywheel cleaned inside of fly wheel magnets and cleaned stator contacts..kill switch..cleaned carb..wondering what else I could check causing this no start without motor spinning fast.. for it to start.. when started runs fine??? (stumped) plz point me in right direction..keep in mind I repair these a lot so very knowledgeable.

[tvnacman]

Is this happening only the first start of the day ? Have you checked the battery voltage while cranking ?

John

[Alleyoop]

Well you answered your own question, the battery is weak or has a bad cell and will not hold a charge. You just said it will start when you have the charger on the battery. So it is one of two things bad battery and or the R/R is not charging when you are riding it.
So take the battery out and take it to an autoparts store they will test it for free and see if it is good or has a bad cell. If it is good then the R/R is not charging the battery, if you have a volt meter you can test that, start the scoot and connect the volt meter to the battery and on the center stand rev it up to around 3-4k and if it is charging the volt meter should read 13+ volts.
Alleyoop

[Tawas]

Well I forgot to let ya know I did charge the battery out with one on my scoot ..it does crank over just as well as mine as I did 2 BB 80cc side by side and yes this is first time starting but when it does starts it runs fine ..but I due have the exhaust off because when the stock one was on its couldn't get the exhaust out that was my other ost so waiting on another bigger exhaust ..but I dont want it to run long without a exhaust on ..it couldn't be back pressure of exhaust can it ..I dont think so..now what.. still check voltage going to starter??oh yea whats the R/R

[Tawas]

hey Ally wondering what the R/R is and there is A good battery in it.. I checked the spark and seems a weak to me should I check the flywheel gap between the flywheel and the pickup ..is there a gap to check or no??

[tvnacman]

are you getting a weak or laboring crank all the time ?

John

[Tawas]

when I crank it it cranks steady no laboring

[Alleyoop]

Well without an exhaust they are hard to start they need some back pressure. So that right there can be your whole problem. And do not run it without one unless you want to burn your exhaust valve. The R/R is your regulator/rectifier that is the one that charges your battery.
Alleyoop

[Tawas]

well found out what was wrong ..I changed the idle jet to one bigger and now it starts great.. I really believe each one of the GY6 motors have different things one might need that another doesn't ..being one idle jet works well on one but the other needs just a little something different like one size bigger jet but both the same motors ..any one agree lol thanks for everyones help this site is wonderful

[Alleyoop]

Nope, I do not agree that could of been remedied with adjusting the Fuel Ratio Mixture setting it richer.
Alleyoop

[Tawas]

Alley I read your reply and see you said adj the fuel mixture would of fixed this .and I also agree I totally forgot about adj that so I took out the bigger jet out and tried it and that..it worked also ..most have the plugs in and forgot that I can drill them out and adj so thanks for the extra info