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Thread: (JONWAY) 50 Scooter problems. Problem: not starting with starter motor.

  1. #1
    Join Date
    6th August 2009 - 23:46
    Bike
    Honda, 1986 VFR400R NC21
    Location
    Mt Roskill, Auckland
    Posts
    70

    Cool (JONWAY) 50 Scooter problems. Problem: not starting with starter motor.

    Hello all, just thought I'd post this as it was a bastard of a problem.
    Daughter got a piece of crap 50 CC scooter.

    Bike was being a real bastard, really hard to start off the starter motor, would just wind and wind and not fire. would start of first or secod kick start (but daughter is a wuss and couldn't kick start it, let alone get it on the main stand)I had changed the battery at about six months old so I thought it might have low cranking voltage (not enough juice for the coil), jumpered it with car battery,, no joy.

    Pulled the spark plug out, checked spark, looked OK'ish (but then again no compression (load) from engine without a spark plug, so I decided to take the coil off my Viffer (which im welding the exhaust on, another long story((TOP PIPE UNDER ENGINE CRACKED->TAKE ENGINE OUT< BOO HOO), tried coil, still same problem.

    Moved on to carburetor (why not) Stripped it, cleaned it (TOTALLY), refitted it, same problem.
    GRRRR.
    Found the problem tonight, there was NO valve clearances, [LIKE NONE], gave them 400 whatevers of an inch and the bike starts first time off the starter motor (now that's just fucking ODD HUH).

    Anyway, the daughters happy, think I might get her to sell it and buy a Honda (before she swipes my viffer)

    A COUPLE OF NOTES FOR THE HOME MECHANIC::::::

    IMPORTANT: do something with the front wheel disc bolts/nuts, my daughters one had ni-locks on it, one came off and the bolt jammed between the disc and the caliper (luckily she was just taking off from an intersection). I mig welded the little buggers on. but you might want to fit spring washers or something ( I have a MIG handy if your in MT Roskill. :-)

    The choke is some sort of bi-metallic thing, it gets power from two wires in, 12 Volt AC (YES AC) must get it from before the rectifier, then it gets warm and pulls the needle valve out (I think).

    Definitely change the spark plug, It had a Chinese A7RTC, I used a NGK CR7HS, but you could use a Champion RZ10YC.(Performs better with new spark plug)

  2. #2
    Join Date
    25th March 2004 - 17:22
    Bike
    RZ496/Street 765RS/GasGas/ etc etc
    Location
    Wellington. . ok the hutt
    Posts
    20,557
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    Quote Originally Posted by Theflash View Post
    . . .
    Anyway, the daughters happy, think I might get her to sell it and buy a Honda (before she swipes my viffer). . .
    Close
    Landfill it & buy a Japanese bike. Sounds like a deathtrap.
    Emotive claptrap probably, but imagine the disc scenario at speed?
    What else is likely to break next because they didn't bother to test it like a responsible manufacturer?
    Don't you look at my accountant.
    He's the only one I've got.

  3. #3
    Join Date
    6th August 2009 - 23:46
    Bike
    Honda, 1986 VFR400R NC21
    Location
    Mt Roskill, Auckland
    Posts
    70

    Unhappy Yes.

    The real problem is that scooters dont require a WOF at all, there is no 6 monthly checking of them, and some of them arrive in NZ (and other countries) in pieces, then someone who is a sales person assembles them (sorry sales people, not insinuating you all have the mental capacity of tadpoles).
    Like getting a builder to do your plumbing.

    My daughter has no idea at all about bike maintenance, so how is she going to know it is safe?

    It may well be they have spring washers on the Disc when assembled in China, but the guy assembling the bikes in NZ was saving them for sinkers.

    Next time I spot one parked, i'll check the disc.

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