Sticky throttle

  1. stuvy

    stuvy Member

    On my new 250 scooter the throttle is sticky

    can these be adjusted or just order a new one?
     
  2. Kram

    Kram Member

    Messages:
    1,417
    Location:
    Sussex
    On bikes its either rusty, frayed throttle cables binding in the liner, or a bent bar sticking the tube. I would start with new cables.
     
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  3. Pete.

    Pete. Member

    Messages:
    9,407
    Location:
    Kent, UK
    New as in brand new or newly acquired?

    First thing to do is check the throttle tube isn't gummed up. Clean with degreaser and clean the bar too. Fit the tube with no lube whatsoever.
     
  4. tom2207 Member

    Messages:
    1,782
    Location:
    uk northern ireland
    is there a spring on the other end , also check the twist grip rubber isnt catching on the switch gear housing ,, seen that before. surprised its not fbw these days.
     
  5. mike os

    mike os just a little insane.....

    Messages:
    6,568
    Location:
    North Wales
    Clean and lube cable to start
     
  6. Pete.

    Pete. Member

    Messages:
    9,407
    Location:
    Kent, UK
    Some modern cables are designed to work without lube. Plastic cable liner and plastic coated inner. I use penetrating oil to dissolve any crud then clean it all off to re-assemble.
     
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  7. tom2207 Member

    Messages:
    1,782
    Location:
    uk northern ireland
    take the end off the carb , Im assuming it has a carb ,, then see if the cable is sticky or whats going on , but being a scooter its probably easier said than done.
     
  8. stuvy

    stuvy Member

    It has twin cables one for throttle open the other for closed return

    for £20 I will order a new set
     
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  9. Matchless

    Matchless Member

    Messages:
    1,172
    Location:
    Essex UK
    Twin cables are usually one for throttle, and one for oil pump,
     
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  10. tom2207 Member

    Messages:
    1,782
    Location:
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    that was the old days ,, lol
    Throttle open and throttle closed so you dont end up looking at a bend too fast , safety thing.
     
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  11. Wallace

    Wallace Member

    Messages:
    7,166
    Location:
    Staines, Middlesex, England.
    Lots already said, cable routing can be a problem as some people don't understand they need a smooth run to work properly. Depends if someone has been messing about with it before, the usual scene is some car park expert has tried a repair and you have to go in blind and find out what is fubar or overlooked. The grip touching the bar end or being damaged and pushed in is a simple one! :)
     
  12. Matchless

    Matchless Member

    Messages:
    1,172
    Location:
    Essex UK
    are you calling my Yamaha BWS 50cc old! it is the newest two wheeler I own, by a long way!
     
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  13. tom2207 Member

    Messages:
    1,782
    Location:
    uk northern ireland
    just pre loved ,,, these modern sports scooters just lack character ,,, and puddles.

    but the big bug eyes are great ,, like a Ruckus / zoomer

    I always liked the Motra ,, but they are thin on the ground these days.
     
  14. Pete.

    Pete. Member

    Messages:
    9,407
    Location:
    Kent, UK
    With twin cables they can bind if they are adjusted with too little free play (or none at all).
     
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  15. stuvy

    stuvy Member

    new to me mate it’s a 1996 yp 250 4stroke

    she runs nice just the cable doesn’t self return and the mot is Thursday so will try tomorrow after work as it’s in the unit where I work.

    being covered in plastic it’s not the easiest thing to take apart quickly
     
  16. RichardM Member

    Carb - check it snaps shut without the cable attached - oil pivots, check return spring.

    Check for frayed cable, wrong routing, handle bar grip hard against handlebar, handlebar rusty and stopping the throttle moving easily, oil cables or clean crud out with PTFE spray. As said neither cable should be tight.

    [​IMG]
     
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