Author Topic: Cold Start Issue  (Read 116 times)

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Offline Skutooter

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Cold Start Issue
« on: May 22, 2018, 11:11:30 AM »
Good Day Fellow Riders

Ok, so I have a Vuka XR125 with stock clone GY6 equipment. She stood for a year or so until I needed to use her as my main means of transport. When I leave for work in the afternoon she starts within a split second of pushing the starter button and idles nice and high till the Auto enricher engages and then idles fine.

The issue I'm having is getting her started in the morning. I can crank her till i'm blue in the face and the battery eventually dies, she will only cold start if I squirt a bit of petrol on the air filter and then keep her revved until she warms up. She stands outside under the carport but i'm now at the stage of wanting to wrap the old girl up in a blanket to keep her warm LOL.

Here's what I have done from reading many many posts and youtube videos to try and alleviate the cold start issue.

1. Drained and put fresh 10w40 oil, lower viscosity for the cold weather
2. Stripped, cleaned and reassembled Carb & Jets
3. New Spark plug
4. New Fuel, Vacuum lines and filter, checked intake for cracks and leaks, none.
5. Adjusted tappets to 0.005 on both intake and exhaust valves
6. Checked Auto enricher is working, it is retracted cold and extended once warm so it is functioning fine.

So, does anyone have a suggestion on what I might be missing? Once again, the issue seems to be fuel related only when bike is cold overnight.

Thanking you guys in advance for the advice


 
Yes I might be on a scooter, go ahead and laugh, but next time you go to fill up your cage's tank, I'll be the one laughing...Mwuaahahahaah!


Offline Mat1998

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Re: Cold Start Issue
« Reply #1 on: May 22, 2018, 12:41:55 PM »
Good day, this isn't just a problem on your scooter but on all carburetted scooters. Both my scooters have this issue and it due to the fact that carburettors and cold starting aren't best friends. What I'd recommend you do is press the starter button without touching the throttle. Many people twist the throttle while starting and when done a couple of times this floods it and makes it even harder to start. I'd also recommend trickle charging your battery once a week as winter does put more strain on the battery as it takes longer to cold start in winter than in summer.

Offline Stanthescooterman

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Re: Cold Start Issue
« Reply #2 on: May 22, 2018, 01:26:04 PM »
this isn't just a problem on your scooter but on all carburetted scooters

Not correct at all

The carb sounds like it is either flooded, or starved.

Flooded: either faulty fuel tap (not shutting off) and/or worn needle/seat.

Starved: check float bowl screws or drain screw, in case fuel is running out.
Previous bikes & scooters:
BMW C600 Sport
Kymco Grand Dink 250 (300),
BMW F650GS Dakar,
Gilera Runner 180,
Kymco Agility 125,
Kymco TB100,
Kymco Heroism KH125,
Honda CBX550FII,
Suzuki RG50 Gamma


Offline Stanthescooterman

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Re: Cold Start Issue
« Reply #3 on: May 22, 2018, 01:30:22 PM »
6. Checked Auto enricher is working, it is retracted cold and extended once warm so it is functioning fine.

yes, that is correct, but read the recent forum thread on auto chokes carefully.
Previous bikes & scooters:
BMW C600 Sport
Kymco Grand Dink 250 (300),
BMW F650GS Dakar,
Gilera Runner 180,
Kymco Agility 125,
Kymco TB100,
Kymco Heroism KH125,
Honda CBX550FII,
Suzuki RG50 Gamma

Offline Skutooter

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Re: Cold Start Issue
« Reply #4 on: May 24, 2018, 10:14:21 AM »
this isn't just a problem on your scooter but on all carburetted scooters

Not correct at all

The carb sounds like it is either flooded, or starved.

Flooded: either faulty fuel tap (not shutting off) and/or worn needle/seat.

Starved: check float bowl screws or drain screw, in case fuel is running out.

So Stan, your starved comment got me thinking, checked the float bowl drain screw and turns out the o ring on it was crumbling, so I taped it up with some plumbers tape until i can get to the scoot shop to buy a carb rebuild kit, she started first turn this morning. Problem solved

Or so i thought, because I had adjusted the float to (unknowingly) compensate for the draining fuel, halfway to work she bogged  down and died, petrol pissing out from the overflow nozzle at the top, so, side of the road, seat off, carb off, readjusted the float level and Voila! No more over fueling

Will see how she starts this afternoon and tomorrow morning but I think the issue is sorted, will put in the rebuild kit over the weekend anyway.

Cant believe how much drama a 3mm o ring can cause
Yes I might be on a scooter, go ahead and laugh, but next time you go to fill up your cage's tank, I'll be the one laughing...Mwuaahahahaah!

Offline Stanthescooterman

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Re: Cold Start Issue
« Reply #5 on: May 24, 2018, 11:33:27 AM »
Thanks for the feedback.

Never faark with the float level on a CHinese  scooter  :rofl:
Previous bikes & scooters:
BMW C600 Sport
Kymco Grand Dink 250 (300),
BMW F650GS Dakar,
Gilera Runner 180,
Kymco Agility 125,
Kymco TB100,
Kymco Heroism KH125,
Honda CBX550FII,
Suzuki RG50 Gamma