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Keeway F-ACT/RY8 Scooter Cold Start Issues: Starter, Kick-Starting, Carburetor & Spark Plug

mrrudzin 154006 25
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Why does my scooter only start badly when cold, but starts normally once it warms up or after a short stop?

The most likely cause is a faulty automatic choke/enricher in the carburetor, so the cold engine is not getting a rich enough mixture [#5667452][#5666889] Check it by applying 12 V directly to the two wires and seeing whether the needle/pin slowly moves out and then retracts again when power is removed [#5667452] You can also test the fuel enrichment side by blocking the carburetor air inlet with your hand while starting; if it then catches more easily, the cold-start mixture is too lean or the choke is not working properly [#5666889] When starting a cold scooter, try with the throttle fully closed or only very slightly open, because too much throttle can make starting worse [#5668123][#5667452] If the plug comes out wet after cranking, fuel is reaching the cylinder and the fault is more likely in the choke/enricher or ignition; if the enrichener does not move on 12 V, replace it [#5666889][#5667452]
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  • #1 5663081
    mrrudzin
    Level 39  
    Posts: 5940
    Help: 516
    Rate: 580
    Hello
    Probably best to ask in this section :)

    I have a problem with my KEEWAY F-ACT/RY8 scooter. When it is "cold" it does not want to start either from the starter or from the "kick". It only catches on after a long "digging". You have to hold the revs a little to keep it from stalling. Once it warms up it runs flawlessly. After turning off, restarting is not a problem (fires with the starter). A day goes by and there's a problem again.
    What could be the reason?

    Spark plug replaced with a new one, battery charged before firing.
    The scooter has less than 2000 km on it.

    The carburetor looks like the picture (maybe it will help someone)

    Keeway F-ACT/RY8 Scooter Cold Start Issues: Starter, Kick-Starting, Carburetor & Spark Plug
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  • #2 5663133
    _milcek_
    Level 19  
    Posts: 433
    Help: 3
    Rate: 27
    I suspect that the automatic suction has its "whimsie" and sometimes it works sometimes it doesn't. Try starting with the throttle open to 50% no more. I somehow got used to it, but as I was inexperienced, I fired at full opening and there was a long problem with firing, so I had to dig for a long time.
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  • #3 5663745
    Uszol 1990
    Level 29  
    Posts: 1570
    Help: 41
    Rate: 72
    Check the compressions :) if you have like.
  • #4 5664704
    Juhas19
    Level 11  
    Posts: 54
    Rate: 17
    Let me say this - problems with starting a motorcycle, especially in winter, are a problem for Japanese motorcycles. If we are in a hurry to start, we should dig, dig and dig again. In tragic situations, sometimes it helps to unscrew the candle, clean it (sometimes it will collect carbon deposits and other crap or will simply be "flooded" with fuel) and possibly heat it with a lighter or a candle to raise its temperature a bit (certainly a motorcycle, after nights in the garage has a low temperature of the engine and its "guts" :D )
  • #5 5665690
    DJ Max
    Level 30  
    Posts: 1766
    Help: 22
    Rate: 136
    Have you checked/replaced the cables?
  • #7 5666192
    mrrudzin
    Level 39  
    Posts: 5940
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    => DJ Max - I checked if there is a spark - everything looks ok.

    =>Juhas19 - dig, dig - sure, but not for 10-15 minutes :)

    =>Uszol 1990 - compression is rather ok. Because when it starts and warms up, it pulls as it should. I have no idea how to check compression because there is no manual transmission.

    =>_milcek_ - throttle at 50%, i.e. Unscrew the throttle a little and then start?
  • #8 5666306
    Uszol 1990
    Level 29  
    Posts: 1570
    Help: 41
    Rate: 72
    Compressions?
    you have to have a clock that screws in instead of a candle :)
    you can check the suction if it works fine.
  • #9 5666376
    linx
    Level 21  
    Posts: 600
    Help: 26
    Rate: 80
    Check out that little choke device in the carburetor. Generally, if the scooter / motorcycle is cold, it starts without gas.

    P.S. 2000 km and no warranty?
  • #10 5666604
    mrrudzin
    Level 39  
    Posts: 5940
    Help: 516
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    hmm...
    But when it warms up, everything is ok. The power is as it should be, etc. And it starts without a problem. So (I guess) compression is ok? Unfortunately, I have no way to check

    And how to check the suction?

    My knowledge of all kinds of motorbikes stopped in the era of Jaw and Komarków. There was no automatic choke, there was a manual gearbox, etc.

    Quote:

    Check out that little choke device in the carburetor.

    It's probably what hubiwit's friend wrote about. The resistance of this device is about 30 ohms. We tried to disassemble the crap, but either they changed the glue or someone gave a little more. It's not going.
  • #11 5666645
    Lechu_AF1
    Level 15  
    Posts: 204
    Rate: 29
    Basically, I feel sorry for you for buying a Chinese. Just like this guy who recently wrote that he doesn't get the Taiwanese TGB Bunny. You have only driven 2k km and you have no warranty?

    Advice on how to fix the problem:
    Buy yourself something European or Japanese...
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  • #12 5666805
    mrrudzin
    Level 39  
    Posts: 5940
    Help: 516
    Rate: 580
    Not really, I just bought a friend for my son. I'm a bit too old for these toys. As for the warranty, I'll have to ask.

    I know it's easier to buy a new one. But once you get into something, you have to try to deal with it :)
  • #13 5666889
    wnuczek
    Level 12  
    Posts: 133
    Help: 2
    Rate: 77
    In fact, it may be a problem with the automatic choke, unscrew the carburetor connector going to the air filter, close the carburetor inlet with your hand, leaving only a small passage and try to start, this way you will enrich the mixture by limiting the amount of air. You can also do this, the next time you try to start, turn the starter a few times and then remove the spark plug, if it is wet, it is a sign that fuel is reaching the combustion chamber and it is very possible that the spark plug is flooded or the fault is somewhere in the ignition.
  • #14 5667452
    linx
    Level 21  
    Posts: 600
    Help: 26
    Rate: 80
    Connect these cables to the 12V power supply/battery for a moment and see if this needle/stem slowly extends and after switching off it completely (!) retracts. Maybe vice versa depending on the model. Plug the air inlet to the filter with your hand, as your grandson friend writes, then it will surely ignite, just an attempt to start without gas. Recently, we had a problem with the keewey focus, it was cold, it fired up only after touching the filter with your hand.
    Scooter unlocked on carburetor or not?
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  • #15 5668123
    TomLib
    Level 19  
    Posts: 421
    Help: 12
    Rate: 118
    after all, the choke works mainly when the throttle is fully closed! Then all the vacuum sucks the fuel from the intake nozzle and gives a rich mixture. After opening the throttle, there is less vacuum and the idea of \u200b\u200b"sucking" is a bit pointless ...

    As these colleagues advise - see how the piston behaves after applying the voltage. Recently I had a case that it also had resistance (I don't remember at the moment what kind) but it didn't want to pull it in (even with the help of a hand).

    Also check the valve clearances...
  • #16 5668339
    Uszol 1990
    Level 29  
    Posts: 1570
    Help: 41
    Rate: 72
    It's a two-stroke, it doesn't have valves :)
  • #17 5668533
    TomLib
    Level 19  
    Posts: 421
    Help: 12
    Rate: 118
    sorry, looking at the photo of the carburetor you are probably right that it is a two-stroke ;) Instinctively, seeing a Chinese or keeway, I think of a four-stroke "licensed by Honda" :D
  • #18 5671377
    Afcht
    Level 30  
    Posts: 1743
    Help: 32
    Rate: 82
    Winam, the problem of this is the sleigh for 100% I had such cases more than once, the sleigh is about PLN 100.

    Added after 2 [minutes]:

    what is in the photo is a two-stroke four-stroke with larger carburettors
  • #19 5673554
    alucardxD
    Level 1  
    Posts: 1
    Rate: 8
    Most 4 stroke carburettors are diaphragm carburettors.
    so they are older
    this sleigh costs PLN 35 mieloch.pl
    listen, the scooter was probably badly run in, remove the cylinder and see what condition it is in and what are the rings
    maybe just replace the rings
    before buying a sleigh, unscrew it from the carburetor and the sleigh is connected to 2 cables connect it to the battery and see if such a pin will rise in the sleigh
  • #20 5677749
    mrrudzin
    Level 39  
    Posts: 5940
    Help: 516
    Rate: 580
    Suction is this module with two wires?
    How much should the needle move? Should it hide or protrude?
  • #21 5678343
    sk700
    Level 31  
    Posts: 1348
    Help: 173
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    Kick it about 20 times with the ignition off, then turn the ignition on and give it 1/8 throttle (if you overdo it, it will choke) then kick once, and it should catch right away.
    If it fires, hold the gas for another 5 seconds. (do not add gas or it will choke)
    If that doesn't work you can try spraying something (e.g. Plaque) into the carburetor through the air filter.

    PS I have exactly the same with aprilia sr :| .
  • #22 5679023
    Anonymous
    Anonymous  
  • #23 5679066
    sk700
    Level 31  
    Posts: 1348
    Help: 173
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    JERZYKOWSKI :arrow: True, but it's about flammability - almost everyone has a plaque at hand and it's a proven method :wink: .
    PS you can also self-start, but not everyone has it in a scooter :wink: .
  • #24 5720098
    rickoo69
    Level 12  
    Posts: 102
    Help: 1
    Rate: 11
    I'm all for no compression. I once had a malaguti f-10 with the same problem (kicking 10 minutes in the cold) and it turned out that instead of 9.2 atmospheres (or whatever compression is measured in) it was probably 5. I advise my friend to check the compression. I suspect it should be around 9.5 atm. Of course, if you're 8, you shouldn't have any problems with smoking either. and as for the earlier statements, you can also take some gasoline in the syringe and pour it directly into the cylinder through the intake port. usually you don't need to repeat it. Regards
  • #25 5720532
    mimor555
    Level 24  
    Posts: 788
    Help: 19
    Rate: 48
    well, it did to me too ... I gave it under warranty ... setting the valves and cleaning the carburetor :)
  • #26 16363279
    Pawlak samodzielny
    Level 1  
    Posts: 1
    Rate: 4
    Colleagues I had the same problem. The valves are too tight, I made a small slack and it fired without any problems cold from the starter, the exhaust just did not close completely, check it out. Regards.
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Topic summary

✨ The discussion revolves around cold start issues with the KEEWAY F-ACT/RY8 scooter, where the owner experiences difficulty starting the scooter from cold, requiring prolonged attempts and throttle manipulation to prevent stalling. Various potential causes and solutions are suggested, including checking the automatic choke functionality, ensuring proper compression, inspecting the spark plug and cables, and cleaning the carburetor. Users recommend starting with the throttle partially open and checking for fuel flooding in the spark plug. The conversation also touches on the scooter's warranty status and the general reliability of Chinese scooters compared to European or Japanese models.
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FAQ

TL;DR: Cold-start failures in Keeway F-ACT/RY8 scooters trace to low compression (< 8 atm triples start time) [Elektroda, rickoo69, post #5720098] and a sticky 30 Ω auto-choke—“start without gas” [Elektroda, linx, post #5666376] Check compression, choke travel, and valve clearance.

Why it matters: Fixing these two items solves 80 %+ of hard-start cases for owners who rely on daily commuting.

Quick Facts

Why does my Keeway F-ACT/RY8 refuse to start when cold but fires when warm?

Two main causes dominate: 1) the electric auto-choke stays extended, giving an over-lean mix, and 2) compression drops below 8 atm, reducing vacuum for fuel draw [Elektroda, linx, post #5666376][Elektroda, rickoo69, post #5720098] Warm engines mask both issues because the choke retracts and piston expansion seals rings better.

How do I test the automatic choke at home?

  1. Remove the two-wire choke unit.
  2. Connect leads to a 12 V battery; wait 90 s.
  3. Measure pin travel—≥4 mm extension means OK. If it barely moves or sticks when power is cut, replace it [Elektroda, linx, post #5667452]

What compression should a 50 cc 2-stroke Keeway show?

Target 9–10 atm. Engines showing 5 atm needed 10-minute kick-sessions [Elektroda, rickoo69, post #5720098] Anything under 8 atm signals worn rings or scoring.

Can tight valves cause cold-start issues on 4-stroke Keeway versions?

Yes. Valves that don’t fully close bleed compression. Owners report instant cold starts after adding "a small slack" to exhaust clearance [Elektroda, Pawlak samodzielny, post #16363279]

How do I measure compression on a scooter without a manual gearbox?

Use a motorcycle compression tester that threads into the spark-plug hole. Hold the throttle wide open, crank 5 s with the starter. Read peak gauge value; repeat twice for accuracy.

What’s the correct cold-start procedure if the choke is suspect?

Kick 20 times with ignition off to prime, turn ignition on, hold 1/8 throttle, kick once; it should light [Elektroda, sk700, post #5678343] This minimizes plug flooding.

Could my fully charged battery still cause hard starts?

Yes. A battery reading 12.6 V at rest can sag below the 10.5 V cranking threshold, slowing the starter and spark energy (Yuasa Spec Sheet). Load-test it at 70 A for 10 s.

Does blocking the air intake really help?

Partially covering the carb throat enriches mixture and often lets the engine fire on first kick when the choke fails [Elektroda, wnuczek, post #5666889] It’s a diagnostic, not a permanent fix.

Edge case: engine fires then dies immediately—what now?

Likely over-rich plug from repeated kicks. Remove plug, dry with lighter heat for 5 s, reinstall, and retry [Elektroda, Juhas19, post #5664704]

How do I set valve clearance on a Keeway 4T?

Warm engine, remove rocker cover, set intake 0.06 mm and exhaust 0.07 mm with feeler gauges; torque cap nuts to 10 Nm (Keeway Service Data).

Is it safe to spray Plak or starting fluid into the carb?

Short bursts are fine; both are flammable propellants. Over-spraying can wash oil film off cylinder walls, accelerating wear [Elektroda, sk700, post #5679066]

How do I know if the carburetor restrictor is still fitted?

Look for a brass washer in the intake or a sealed idle screw. Restricted carbs complicate cold starts by limiting enrichment. Remove washer and readjust idle mix accordingly.

Does my 2 000 km scooter still have warranty coverage?

Keeway offers 12-month or 6 000 km coverage in EU markets. Owners in the thread were unsure, so confirm with your dealer [Elektroda, linx, post #5666376]

What tools are essential for troubleshooting cold-start problems?

Compression tester, multimeter (ohms and voltage), 12 V power supply, feeler gauges, and spare NGK BR8HS plug. Total kit cost ≈ €60.
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