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Junior Mint
Junior Mint

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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Mon Jul 27, 2015 3:48 pm 
Thanks Greyduck, you were absolutely right.

Now onto the main jet I go :) Plug's a bit black after WOT runs yay time to go down a few more jets.

One last hopefully quick one.

When I quickly turn the throttle it dies out, is this another good indicator of a main jet that's too big?

Thanks!

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Habitual Offender
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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Mon Aug 03, 2015 4:38 am 
Posting here because I can't get a definitive answer to my situation. Here's what I have
Gy6
Angled cocking flange
Keihin carb with unchanged jets
Uni filter
Mikuni fuel pump
Fresh gas

The ruck will start and run, but I have to keep blipping the throttle to keep it alive and idle. It doesn't putter, in fact it sounds really strong, but when I let go of the throttle to let it idle, it dies instantly. Here's a video link http://youtu.be/P-2cwDZhAL0

After I took this video, I did a burnout. And it did a solid 5 second burnout without dying.
Wondering if I should....
Check the valves
Play with the air fuel screw
Or if I should do something else

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Habitual Offender
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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Mon Aug 03, 2015 5:56 pm 
Never mind. I fixed it. I had a noob moment and forgot about the idle screw. Dee da dee.

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Needs Training Wheels
Needs Training Wheels

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Posts: 39
Location: Moncton, New Brunswick
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 Post subject: Charging Question
PostPosted: Mon Jan 25, 2016 9:42 am 
Charging Question
11 pole, 7 wire Rectifier. Danmax harness.(headlights running AC)

12.98vdc when Not Running, at battery.
15v-16.6vdc Running. (at 1,400rpm) at battery.

When i throw in my spare used 6 wire rectifier, i get 12.54vdc at the battery.

Overcharging is a Faulty Rectifier right?


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Needs Training Wheels
Needs Training Wheels

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Location: Moncton, New Brunswick
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 Post subject: Re: Charging Question
PostPosted: Wed Feb 03, 2016 12:55 pm 
independent77 wrote:
Charging Question
11 pole, 7 wire Rectifier. Danmax harness.(headlights running AC)

12.98vdc when Not Running, at battery.
15v-18.6vdc Running. (at 1,400rpm) at battery.

When i throw in my spare used 6 wire rectifier, i get 12.54vdc at the battery.

Overcharging is a Faulty Rectifier right?

Did some testing and figured it out.
Spare rectifier was toast, bad diode.
Connecting the black wire(7 wire) to a switched DC source dropped the charging to 15.6vDC, Adding 55w headlight bulbs caused the charging voltage to drop to 14.4vDC. Good enough for me.


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Needs Training Wheels
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Location: Just south of weird, Oregon
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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Fri May 13, 2016 2:25 pm 
Jleclair738 wrote:
Posting here because I can't get a definitive answer to my situation. Here's what I have
Gy6
Angled cocking flange
Keihin carb with unchanged jets
Uni filter
Mikuni fuel pump
Fresh gas

The ruck will start and run, but I have to keep blipping the throttle to keep it alive and idle. It doesn't putter, in fact it sounds really strong, but when I let go of the throttle to let it idle, it dies instantly. Here's a video link http://youtu.be/P-2cwDZhAL0

After I took this video, I did a burnout. And it did a solid 5 second burnout without dying.
Wondering if I should....
Check the valves
Play with the air fuel screw
Or if I should do something else


I have this exact same problem right now. I've had it for a while. I have the OKO 30mm carb, and the jets I had in it before were 145/38 with the needle notched at the 3rd spot from the top. The air/fuel screw was turned ALL the way in and I could get it to start and run but I had to be good about being on the throttle for the first 5 minutes. After that it was pretty good, but would die if I didn't give it some throttle every 3 minutes or so.

I changed them to a 120/40 needle at 2nd spot from top, and it does the EXACT same thing. I can get it running, but has to be throttled. Air fuel screw all the way in. Dies much faster, like 15 seconds

I changed it again to a 120/32/needle at 2nd spot and no change what-so-ever.

I am stumped and about to go back to the stock carb, because this is just ridiculous. I am thinking I must have read something wrong because I thought that if the screw was all the way in, that meant lean. But on this carb, does it mean rich? Do I need to make the slow jet something like a 50, and move the needle clip down to the 4th spot?

When I had it idling, I would adjust the screw in and out, and when I moved the screw out I could really tell it was bogging down hard. So I would turn the screw back in and it was fine.

The throttle screw (the one with the spring) is turned in almost all the way.

HELP :headbashing: :headbashing: :headbashing: :headbashing:

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Shot Caller
Shot Caller

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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Sat May 14, 2016 6:10 pm 
MisterMeeseeks wrote:

I have this exact same problem right now. I've had it for a while. I have the OKO 30mm carb, and the jets I had in it before were 145/38

HELP :headbashing: :headbashing: :headbashing: :headbashing:


How big is your engine? 30mm is prob too big if you're stock 149

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Needs Training Wheels
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Posts: 44
Location: Just south of weird, Oregon
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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Sun May 15, 2016 6:07 pm 
greyduck wrote:
MisterMeeseeks wrote:

I have this exact same problem right now. I've had it for a while. I have the OKO 30mm carb, and the jets I had in it before were 145/38

HELP :headbashing: :headbashing: :headbashing: :headbashing:


How big is your engine? 30mm is prob too big if you're stock 149


That's honestly what I'm about to find out.

I just picked up a Polini 26mm and will be swapping it out tomorrow. I bet money I'll be right back on the roads with this thing after a twenty minute swap out.

Will post an update!

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Needs Training Wheels
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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Fri May 27, 2016 8:14 am 
Hey I'm looking at a motor to do the swap with right now and I have a question. How long is the long case? It sounds stupid but I can't seem to find it any where. The motor I'm looking at now is 11inches long from rear axle to the back of the motor. If somebody with a 150 could give me some measurements that would be awesome!!

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Needs Training Wheels
Needs Training Wheels

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 Post subject: Re: POST HERE. HELP ME fix my GY6
PostPosted: Thu Aug 04, 2016 8:28 pm 
Hello Im having a rough time figuring out my jets. What would be a good starting size? I'm also from NJ if that helps with the altitude. I'm running a 130/40 right know but it take a lot of cranking to get it started.

Gy6 175cc Buggydepot engine
Uni filter
Hot lap exhaust
30mm Cvk Carb


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n00bie



Posts: 2
Location: Pennsylvania
Gender: Dude
Garage mechanic
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 Post subject: Re: Starting Issue
PostPosted: Mon Jul 03, 2017 3:44 pm 
08 GY6 with a new Scorpion battery (checked charge before install and read 12.9 volts), new starter, and new starter solenoid. I put the key in and solenoid just clicks. I try to jump it and it barely wants to crank. I did check for spark and I am good there. The bike ran when I bought it a few months ago, but has since opted to not start. I was told by the PO it is an 11 pole stator setup. Any thoughts?


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