Cold start / hot start issues after spending 600€ fixing the engine

Discussion in '610/630' started by Soaime, Sep 3, 2017.

  1. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    So guys, i'm really in deep ****. Any help is much appreciated.

    Cold start:
    View: https://youtu.be/s1XzlMRwdhs


    Hot start after running an hour on the street:
    View: https://youtu.be/rUnI1ToYmUk


    The bike has the pu plug and am running 97-105-110 but every setting i use i have this start issues. It drowns very quickly when missing one or two starts.

    The husqy dealer here in Bucharest won't help me repair the bike because they were only trained for post 2013 bikes so i have to rely on you guys for some help.

    From the moment i bought it in April i had to do in this order:
    - water pump replacement
    - temp sensor replacement
    - spark plug replacement
    - airbox replacement
    - cyl lower, upper and head gasket replacement after resurfacing the cyl and cyl head because they were off and it blew out the cooling liquid because the cyl gasket was blown.
    - also, the guys at the service told me they did the valve clearance and seating

    So guys...what do you think?
  2. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    in my opinion, you have to put the bike under original factory conditions
    100/100/100 carburable
    original muffler
    Lambda probe
    Start con 100/100/100 carburation
  3. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    Hey Rotax,
    I have the default exhaust, will try first with the pu plug on and 100-100-100 and see what it does, if it-s no difference i will put the lambda probe back again.
    Thanks.
  4. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    So i've just updated my CO settings to 100-100-100 and now i have to wait to get the engine cold again so i can try a cold start. Later today i am going to try a hot start also.
    There seems not to be any differece from 97-106-112 to 100-100-100 but maybe i didn't try it for too long.
  5. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    I would add that cold or hot starting problems almost always depend on a thermistor failure.
    you say you have replaced it
    Are you sure it's efficient?
  6. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954

    Well, i replaced it with a new sensor (the modified part number) and in iBeat it seems to be ok, it reports the coolant temp as it should.

    I started the engine at 29 degrees celsius (25 outside) and didn't start easy. No problem with hot start yet, i don't think it got hot enough.
  7. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    in the first video I see you use for a long time the starter lever .....
    with temperatures above 20 degrees I never use the starter lever.
    It would be a stupid thing to use it and it would cause a startup
  8. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954

    Tried with and without the starter, and, as you say, it is harder to start with the starter lever. Now i mainly start it without starter.
  9. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    Ok
    I would say that over 20 degrees celsius never use the starter
  10. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    can you please tell me that connecting cable use for ibeat?
  11. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    IMG_6030.JPG IMG_2861.JPG
    I'm running Windows xp 32 bits on a virtual machine on Mac through Virtualbox. If you want windows to recognize your usb device you also have to install on that machine Virtual guest additions.

    Anyway, i ran the bike for 40 minutes, turned it off, in 10 minutes tried to start it and, of course it did the same thing, after idling for 4 seconds it stalled.
    Rotax_655 likes this.
  12. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA
    to me it seems hot when you try to start missing gas. if the minimum increase is better?
    is the tps attached?
    Start with 105/100/100.....
    The engine run lean for me when is hot
  13. DYNOBOB Husqvarna
    Pro Class

    Location:
    Cincinnati (Lebanon), OH
    Husqvarna Motorcycle:
    TE630
    Other Motorcycles:
    SuperTenere-GL1800-CBR900RR-KLX250S
    I think you have a fuel delivery problem (lack of fuel pressure). It could be you have a kink in the fuel line, failing fuel pressure regulator at the pump, or weak fuel pump. You need to devise a way to check your fuel pressure at the fuel rail/injector. I have a liquid filled gauge T'd into my fuel line and permanently installed on the bike by the gauge cluster.

    [IMG]

    [IMG]
    julienl and Rotax_655 like this.
  14. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954

    Hey Dynobob, thanks for the tip. This is what the mechanics at the service think it should be but they did not take it apart yet. Should the fuel pump pressure be arround 45 psi?
  15. DYNOBOB Husqvarna
    Pro Class

    Location:
    Cincinnati (Lebanon), OH
    Husqvarna Motorcycle:
    TE630
    Other Motorcycles:
    SuperTenere-GL1800-CBR900RR-KLX250S
    Yes, 45psi.

    .
    julienl likes this.
  16. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    So update, my mechanic told me the fuel pump does not have enough pressure and this causes the hot start problems for sure. I ordered one of ebay for arround 40 dolars (original was 500) and am waiting for the delivery which will take some time. Tomorrow i will check valve clearance and hope this is the problem for the cold start.
  17. DYNOBOB Husqvarna
    Pro Class

    Location:
    Cincinnati (Lebanon), OH
    Husqvarna Motorcycle:
    TE630
    Other Motorcycles:
    SuperTenere-GL1800-CBR900RR-KLX250S
    I hope he actually tested the pump and didn't leap to the conclusion that the fuel pump is bad. It could be the pressure regulator has failed in the open position and is bypassing all the fuel back into the tank (another member here just had that happen). I've also seen the short fuel line inside the tank start leaking and loose pressure to the fuel rail (happened to my buddy twice but both hoses were aftermarket and ethanol fuel ate them). It's possible you have a bad pump especially if you ever ran the bike dry on fuel.

    Good luck!

    .
    Rotax_655 likes this.
  18. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    Thanks Dynobob, my mechanic tested it and it did not make 3.1 bars (or 45 psi) so now i'm waiting for the pump and hope that everithing is ok.

    OFF topic, have you used Twinduro on the front wheel? Me bike starts wobbeling like trying to tankslap after 100km/h even after resetting the suspension to factory setting. Also, if i move the bars like trying to slalom (quick change of directions) i feel that it does the same thing. I'm really afraid to go past 115 km/h.
  19. Rotax_655 Husqvarna
    AA Class

    Location:
    If I can around the world
    Husqvarna Motorcycle:
    ex TE 630
    Other Motorcycles:
    Aprilia Pegaso 650 GA

    Has the wheel been balanced?
    To get more stability at high speeds, you can pull up the fork limbs by 1 cm above the top plate.
    the pressure keeps it at no less than 1.2 bar on the road
  20. Soaime Husqvarna
    B Class

    Location:
    Bucharest
    Husqvarna Motorcycle:
    TE 630
    Other Motorcycles:
    Honda 954
    So, i finally found out that:
    - the pump was not working properly, replaced it with a 35$ pump from ebay and now the engine starts good when hot and has a lot more power
    - the valve clearance was off so this is why the cold start was hard

    i also need to mention that when changing CO settings in ibeat they didn't have much effect with the old pump so this could have been a sign that the pump was not working properly.

    Thank you guys for all the help, i hope this helps other guys around here.
    Rotax_655 and DYNOBOB like this.