1. 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    TE = 4st Enduro & TC = 4st Cross

[EFI] SMR 510 VS 450 ENGINE/MOTOR?

Discussion in '4 Stroke' started by Mehusieni, Sep 14, 2018.

  1. Mehusieni Husqvarna
    A Class

    Location:
    FINLAND
    Husqvarna Motorcycle:
    Husqvarna SMR 510 (2008)
    Are these engine blocks/cases identical in a 450 SMR and a 510 SMR?
    Would I be able to fit a 510 SMR crankshaft etc. into a 450 case?
    What are the differences in the bottom-end?

    OEM part numbers match
  2. Trenchcoat85 Husqvarna
    Pro Class

    Location:
    Northern NorCal
    Husqvarna Motorcycle:
    '14 TE 310R
    Other Motorcycles:
    '85 shovel, '75 DT400, '97 XR400
    I don't know (rancher1?) but it sounds like you answered your own question.

    So "yes".
    Mehusieni likes this.
  3. ghte Husqvarna
    Pro Class

    Location:
    Bright, Victoria Australia
    Husqvarna Motorcycle:
    2 x 310's, 2016 Beta 480, SWM RS650
    Other Motorcycles:
    2016 Multi ,Griso1100, Monster695
    Yep the old red motors had the same bottom end (read cases etc from the 250 up to the 510
    Mehusieni and Trenchcoat85 like this.
  4. Mehusieni Husqvarna
    A Class

    Location:
    FINLAND
    Husqvarna Motorcycle:
    Husqvarna SMR 510 (2008)
    Reason why I'm asking is because my bike locked up yesterday and cracked the case. Have no idea why. Top-end was rebuilt 60h ago, changed the oil every 20h (streetriding), valves checked 40h ago. When I swapped the piston, the crank had no freeplay or signs of wear like everything else in the motor. The crack is behind the stator cover on the left, inside is what I assume to be the bearing for the counterballancer. Starting to make me wonder if the huskies are even reliable:excuseme:


    crack.png

    Screenshot_2018-09-13-20-35-15.png
  5. Trenchcoat85 Husqvarna
    Pro Class

    Location:
    Northern NorCal
    Husqvarna Motorcycle:
    '14 TE 310R
    Other Motorcycles:
    '85 shovel, '75 DT400, '97 XR400
    That fracture looks like the force was axially along the shaft supported by bearing #8. The bearing retainer screws #4 may have been hit or pushed to the left by something impacting the counterbalancer shaft? IOW, on the other side of the engine.

    If your engine is okay (unlikely), you may be able to just get rid of the CB and patch things up. But really, you probably need more than just new cases.

    I'm not a big block expert by any means- but my opinion through observation is that these engines are very reliable.

    good luck (was it juice mushroom?).
    Mehusieni likes this.
  6. Mehusieni Husqvarna
    A Class

    Location:
    FINLAND
    Husqvarna Motorcycle:
    Husqvarna SMR 510 (2008)
    Yes it's me. The cases are just a start and found them cheap. Going to need all bearings, connecting rod, piston etc. but if the crankshaft is toast, my bank account will be also. I have the entire winter to figure it out.
    Thought the huskies were as reliable as KTM's RFS engines if not more reliable. Might also post a thread with pictures when I take it apart, feel like fellow husky owners might want to see the carnage.
    Trenchcoat85 likes this.