1. 2 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
    WR = 2st Enduro & CR = 2st Cross

250-500cc Ignition timing of '92 360 wxc

Discussion in '2 Stroke' started by Dauer, Jan 9, 2016.

  1. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605
    So as some of you may know I've been in need of a stator and coil for my 360 since it came into my possession about a year ago. I finally pulled the trigger on a complete system from powerdynamo to replace the motoplat "mini 4" stock ignition. I decided to go with this system because it has a lighting coil and an external rotor contrary to the PVL system.

    Now comes the install, which to me is slightly daunting being as I'm a complete greenhorn when it comes to ignition electrics. The kit included reasonably detailed instructions, the actual mounting of components and the wiring seems straight forward. Setting the timing on the other hand is where experience will seem to come into play, which as previously mentioned I am lacking. The rotor does have a timing mark that can be aligned with the timing mark on the stator plate so I get that part. I also understand I will need a dial indicator to set the timing, which brings me to my initial question: what is the factory setting of a '92 360? Is it the same as later 360's? I have a manual for a '99 which states factory timing at 9° (0.6mm). Does the 0.6mm indicate the distance BTDC?
  2. rancher1 Husqvarna
    Pro Class

    Location:
    WA
    I am not sure of the timing but you should be cautious since the 93 and later were kokusan and yours was motoplat.
  3. juicypips Husqvarna
    Pro Class

    Location:
    gloucestershire
    Husqvarna Motorcycle:
    wr 360. 2002
    Other Motorcycles:
    Gas Gas TxT 300, Yamaha wr250f
    Yes its before tdc. As the spark needs to go off as the piston is naturally returning down the cylinder and 9• seems about right for the husky.
  4. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605


    Yes, valid point. That had crossed my mind that later 360's had different ignitions and could differ in timing.



    Ok, thank you. Now that I think about it, by definition any piston position other than TDC would be below. How does that saying about stupid questions go? What I meant to ask is if that measurement of 0.6mm is taken with the piston on the down-stroke? Which also seems an obvious answer because if the ignition fired when the piston was on it's up-stroke it would be detrimental to the production of power and longevity of internal components. Bear with me...I'm getting there :)
  5. Darrel78 Husqvarna
    AA Class

    Location:
    Central Arkansas
    Husqvarna Motorcycle:
    87 WR430
    Actually you want the spark (ignition event) to occur as the piston is traveling up. BTDC is before top dead center. This is desirable as to take care of the time it takes for the combustion process to begin. The ignition event begins a combustion cycle where you have an ignition of your fuel / air mixture and a traveling wavefront of expanding gases. Take a look at juicypips' picture of the carbon residue on his piston and you can get an idea of what's going on. BTDC as it takes a bit of time to get this process going. But not too far BTDC...
  6. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605
    Ah, I see, good to know. Not only is there a saying about stupid questions but there is also a saying about making assumptions, I seem to have covered both of those. I have a decent grasp on the actual ignition process i.e. combustion of air/fuel mixture. However it should be quite clear by now that ignition timing is not my strong point. I've read of experiencing an issue of the bike running in reverse after an ignition swap and it troubles me. What typically causes this?
    Darrel78 likes this.
  7. juicypips Husqvarna
    Pro Class

    Location:
    gloucestershire
    Husqvarna Motorcycle:
    wr 360. 2002
    Other Motorcycles:
    Gas Gas TxT 300, Yamaha wr250f
    As darrel 78 stated its on up stroke but by the time the signals gone through pick up and to spark then to ignite the mix the piston will be on the down turn.

    Dont beat yourself up about anything we all started somewhere
    Oh yeah and if you start a job an it takes you longer than you think never say your slow state that your being methodical! ;) image.jpeg
    Thats the image if me piston at 1.27mm squish i play with timing by adjusting and riding never had a dial guage just done by feel n ear.
    Sure its not perfect but its perfect for me.
    Dauer, justintendo and Darrel78 like this.
  8. justintendo klotz super techniplate junkie

    Location:
    mercer, pa/northwest pa
    Husqvarna Motorcycle:
    84 250,86 400,87 430,88 250,95 360
    Other Motorcycles:
    99 kawasaki zrx 1100
    the 360s also have different port timing that may have a different spec..it seems the 97ish and earlier are much different than the 98-02..perhaps a different spec as well
  9. Darrel78 Husqvarna
    AA Class

    Location:
    Central Arkansas
    Husqvarna Motorcycle:
    87 WR430
    Don't get too hung up on this; a dial indicator is real nice but even a wooden dowel stick with accurate marks will serve your purpose. Keeping an eye on your goal, some value before top dead center, you can measure distance via piston travel as displayed via the spark plug or measure around your flywheel. Circumference divided by 360 is your degrees. Several articles on the forum on this subject. Easy to do.
    juicypips likes this.
  10. juicypips Husqvarna
    Pro Class

    Location:
    gloucestershire
    Husqvarna Motorcycle:
    wr 360. 2002
    Other Motorcycles:
    Gas Gas TxT 300, Yamaha wr250f
    Hell im gunna set my timing just for the kick now. Cheers for the tip ;)
    2premo and Darrel78 like this.
  11. 2premo Husqvarna
    Pro Class

    Location:
    Northern NV
    Husqvarna Motorcycle:
    98 WR360, 1987 WR430, 1988 XC430
    Other Motorcycles:
    Sherco 300, 2002 KTM 380EXC
    most bikes run in a general range of a few thou. or a mm
    my 430 is 1.9 my 250 is the same and they share an ignition
    don't get too bogged down a couple mm BTDC and try it if it seems flat advance it, if it sounds aggressive and or pings retard it
    Darrel78 likes this.
  12. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605
    All great info and advice. It's funny you mention using a wooden dowel because a guy at my local motorcycle shop said the same thing. Hollow out a spark plug, thread it in, insert the dowel, verify TDC then go from there. Sometimes I get hung-up at every minor detail when I'm tackling a task I'm not very experienced in because I'm unsure which details are imperative and which have a little wiggle room. It seems to me that a flywheel puller (the Husqvarna puller doesn't work with the powerdynamo rotor) may be more beneficial than a dial indicator because I doubt I'll nail the timing at first crack.
    Darrel78 likes this.
  13. juicypips Husqvarna
    Pro Class

    Location:
    gloucestershire
    Husqvarna Motorcycle:
    wr 360. 2002
    Other Motorcycles:
    Gas Gas TxT 300, Yamaha wr250f
    Yup need a flywheel puller for sure, well my bike rips so will tinker with timing see if i can improve anything.
    After all it only costs me time.
    Darrel78 likes this.
  14. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605
    Just spoke with the always helpful folks over at Hall's and inquired about the factory timing for my bike. They informed me that it is 1mm or .040" BTDC. Gonna start with that and go from there. Thought I'd share that info with you all. :cheers:
    juicypips and justintendo like this.
  15. justintendo klotz super techniplate junkie

    Location:
    mercer, pa/northwest pa
    Husqvarna Motorcycle:
    84 250,86 400,87 430,88 250,95 360
    Other Motorcycles:
    99 kawasaki zrx 1100
    just placed another order with them myself!
  16. Dauer Husqvarna
    AA Class

    Location:
    Western NC
    Husqvarna Motorcycle:
    1992 WXC 360
    Other Motorcycles:
    '89 Yamaha TDR250, '01 ATK 605
    Nice! You can't beat 'em!