yamaha jog starting problem, help!

Discussion in 'Battle Scooters' started by JG5, Jan 12, 2010.

  1. JG5

    JG5 Adventurer

    Joined:
    Jan 10, 2010
    Oddometer:
    12
    hey so i found a 1990 yamaha jog for a decent price, when i contacted the guy he said it would start but when i went to pick it up he couldnt get it started. so when i got home i installed a new spark plug and checked the compression, so i tried to kick start it but it wouldnt work i tried the electric start but all i heard was a buzzing sound and a few times it almost turned over. so what should i do? any help would be greatly appreciated
    #1
  2. Quickv4

    Quickv4 Pro Turd Polisher

    Joined:
    Jul 5, 2009
    Oddometer:
    550
    Location:
    Dickinson, Nort' Dakohtah- Orig. from Wiscowsin
    Dirty Carb, Dirty Carb, Dirty Carb, Dirty Carb

    Take apart, clean it really good, adjust everything to base settings, ride...


    :D

    Its really easy to clean, My former Razz took about a hour to disassemble/reassemble, HOWEVER, I did have the stripped carb body soaking in a gallon can of carb cleaner overnight.

    If you need any other help, just post up...
    #2
  3. pennintj

    pennintj Down & Dirty Mechanic

    Joined:
    May 7, 2007
    Oddometer:
    161
    Location:
    New Orleans, LA
    Sounds like the battery is low or dead for starters. Try charging the battery and see if it will crank.

    Tom
    #3
  4. JG5

    JG5 Adventurer

    Joined:
    Jan 10, 2010
    Oddometer:
    12
    it took the carb off it looked very clean but i cleaned it again, i have no idea what the base setting are there just put to what they were before. i checked the battery and it was 11.62 volts so that should be good, i also cleaned the battery terminals. am i missing something?
    #4
  5. nii

    nii Johnnie Walker

    Joined:
    Jan 11, 2010
    Oddometer:
    62
    Location:
    Sofia, Bulgaria
    the battery should be around 12.5 volts, but the Jog will kick start even if the voltage is down.
    I guess you should see if the automatic choke works. you can dismount it, apply 12 volts to the plug and see if it moves a bit with time.

    try to cover the airbox intake with something (manual choke of sorts), if it starts - then change the choke or have the carb adjusted.
    #5
  6. pennintj

    pennintj Down & Dirty Mechanic

    Joined:
    May 7, 2007
    Oddometer:
    161
    Location:
    New Orleans, LA
    Battery will read between 11 - 13 volts depending on how recently it was charged. Put your meter on it, hit the starter button, and if it reads under 8 volts (under load) it's bad.

    Yes with a kickstart it should start, however it'll be easier to troubleshoot with it starting on the starter.

    My next suggestion will be to test the auto-bystarter for failure, if your jog has one. Easiest method is to cover the airbox intake and crank the bike.

    -Tom
    #6
  7. 30Bones

    30Bones Long timer

    Joined:
    Oct 5, 2005
    Oddometer:
    4,690
    Location:
    Marion, IA
    Found a Jog locally...pretty rough for $300 and he says there is a title that was lost and the PO will sign paperwork to get it back.....
    #7
  8. JG5

    JG5 Adventurer

    Joined:
    Jan 10, 2010
    Oddometer:
    12
    i did the airbox intake test and still nothing. the first and sometimes second try of starting after letting the bike sit the engine makes a weak attempt at turning over but after that it just makes that buzzing noise
    #8