1. Husqvarna Motorcycles Made In Sweden - About 1988 and older

PVL IGNITION ADVICE 500 LC

Discussion in 'Vintage/Left Kickers' started by troublemaker, Feb 25, 2013.

  1. suprize Husqvarna
    Pro Class

    Location:
    Bendigo, Australia
    Husqvarna Motorcycle:
    WR 400, bike in a box Moto Villa 350
    Other Motorcycles:
    ktm 300
    SEM "Seldom Electricity Making"
    RUF, ajcmbrown, troy deck and 2 others like this.
  2. disonny Husqvarna
    AA Class

    Location:
    upstate ny
    Husqvarna Motorcycle:
    73 360 wr/rt, 75 wr250 78 cr250,
    Other Motorcycles:
    83 wr250, 84 wr400
    Have you tried grounding the backing plate? I've read that sometimes a ground wire from the backing plate to a coil mounting bolt can help. Just a thought.
  3. darren7878 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    79 CR390 and 84 CR250
    Other Motorcycles:
    81 Maico, 79 Kawasaki, 88 Honda
    A friend of mine has 2 cr500s that start perfect on the kicker no decomp either both on electrex

    I have 2 250s on electrex start them in my trainers .
  4. Bigbill Husqvarna
    Pro Class

    Husqvarna Motorcycle:
    '83 250wr
    Other Motorcycles:
    0 right now

    Don't we need to use non resistor spark plugs with the SEM ignition?

    My very first outing with my 83/250/wr/SEM went awesome on the first ride. After washing the bike off the SEM failed. #=#!#=:/=#:+/# made me mad.

    The husqvarna chainsaws use the SEM ignition and mine never failed. But we had to re-epoxy other magnets in the customers saws. The original epoxy cracked.
  5. 1982 XC 430 Husqvarna
    AA Class

    Location:
    Seattle Wa
    Are You using the same Electrex model on the different Bikes ? With out lighting or with.? I see You have a Maico 490, tried one there ? Are You getting them direct from Electrex or somewhere else?
    darren7878 likes this.
  6. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997
    Reviving this thread again.
    I have bought a Chinkychonka Coil and CDI system to my LC500.
    Hopefully it will be easy to start because it's a bitch.

    Attached Files:

    • CDI.JPG
      CDI.JPG
      File size:
      74.8 KB
      Views:
      61
    husqyman likes this.
  7. husqyman Husqvarna
    AA Class

    Location:
    S.E Kent UK
    Husqvarna Motorcycle:
    1988 XC430, 1987 250WR.
    Other Motorcycles:
    Triumph Tiger 955i
    Well it looks good. Let us know how it works?
  8. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997
    Yeah.
    It is at least 10 hp in Bling ;)
    I will let you know.
  9. stormer254 Husqvarna
    AA Class

    Location:
    England
    Husqvarna Motorcycle:
    More than I dare let her know
    Other Motorcycles:
    Yes!
    Very interested how it goes, I have several dodgy Moto Splatts!
  10. grouty Auto Lover ...

    Location:
    South West UK
    Husqvarna Motorcycle:
    78 390WR, 78 390 AMX, 500 Humph
    Other Motorcycles:
    works 73 CCM 520, another 73 CCM520
    Electrex World Steve ! Well worth the money.
    I have heard good things about some systems made from Chinky bits though. Would I trust it not to kick back ........ :cool:
  11. stormer254 Husqvarna
    AA Class

    Location:
    England
    Husqvarna Motorcycle:
    More than I dare let her know
    Other Motorcycles:
    Yes!
    I have one on the 420, it is very good however I need half a dozen more! By the way if you are still interested I think I have a set oF 390 cases NOS.
  12. dukkman Husqvarna
    AA Class

    Location:
    Warwick Queensland Australia
    Husqvarna Motorcycle:
    85/WR 400,86/WR 240,83/430 is mates
    Other Motorcycles:
    69@71/TS90-76/TS100-72/DKW-78/PE
    I was the guy who thought up using Chinky bits to overcome the SEM hard starting problem.
    My theory was that the SEM wiring gets tired and the CDI trigger voltage goes down over time.
    This makes them harder to kick start but can still be bump started with no problem because the flywheel is spinning faster therefore making a higher trigger voltage.

    I have made up a ignition test bench and you can see the output voltages at different revs.

    The Chinese CDI's use a lower trigger voltage and you can kickstart again.

    Having said all that my WR400 is getting hard to start again.

    The WR240 is great with no problems.
    Had the SEM rebuilt in England only to find that the trigger voltage was too low when it came back and it would not spark under 1500 rpm.
    Didn't want to send it back to the same guy who cocked it up to get it fixed so I fitted the Chinese CDI to it and that fixed that problem.

    I don't know if the problem is me [ old age , no ligaments in my right knee and damaged quads ] or the WR 400 SEM trigger voltage has dropped too low to work these CDI's.
    Still I've extended the WR's starting life over 3 years at a cost of $30 so no complaints.
    husqyman likes this.
  13. darren7878 Husqvarna
    AA Class

    Husqvarna Motorcycle:
    79 CR390 and 84 CR250
    Other Motorcycles:
    81 Maico, 79 Kawasaki, 88 Honda
    1982 XC 430 - All bikes are running electrex STK018. Haven't tried one on the Maico 490 its 'mothballed' but if I was racing it again id certainly look into it. A lot of timing, spark and fueling issues on those 81 piston ports engines.
  14. grouty Auto Lover ...

    Location:
    South West UK
    Husqvarna Motorcycle:
    78 390WR, 78 390 AMX, 500 Humph
    Other Motorcycles:
    works 73 CCM 520, another 73 CCM520
    I do seem to remember a very detailed thread some time ago over on OzVmx. I guess that was yours Dukkman :) A very informative read.

    Yes please Steve. Can you give me a ring or text me with a price.
  15. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997
    Just got my ChinkyChonkwonka ignition mounted.
    Damn, it gives spark an no rpm at all.
    Something have happened over the years I guess.

  16. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997
    Well.
    That worked.

    My foot is not happy now.
    I had to retard the timing to the max to not break my fot.

    This setup gives spark at so low crankspeeds that it will kickback when you turn the engine by hand.

    It pulls harder.
    Sounds different to.

    Good buy.
    Except the foot issue
  17. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997
    So lets summarize the ChinkYdinkydonk CDI and Coil system.
    I bought a slightly different one with a "Racing CDI", whatever that means.

    I used the wiring diagram that PEZberg showed us.

    The biggest different is that this system gives Spark with the big S.
    The old SEM system was always a pain in the ass to start.
    Most of the time it didn't ignite at all.

    This system ignite at every try, no matter how hard or loose you kick it.
    That's the upside.

    The downside.
    It will backfire like a mule with it's balls in a wise.
    I had my ignition set to 2.64mm btdc before but now i have retarded it to 1.5 ish now.

    And I can bumpstart it.

    Now I have to regain my confident and kick the shit out of it so it doesn't backfire.
  18. 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
    i also run my timing around 1.5mm or so...good to hear you have good spark at least! maybe too good??
  19. Nikel Husqvarna
    AA Class

    Husqvarna Motorcycle:
    Husqvarna CR500 1987 Supermotard.
    Other Motorcycles:
    Kawasaki Zx6R 1997

    Okay.
    Yes, maybe too good actually.
    I know that you could buy a kit for the Hondas that only give spark on the Second revolution when you start it.
    Should be almost impossible to backfire then.
  20. 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
    hmmm, going to 1.5mm always seems to get rid of the back talk for me..it does hurt and the bike pays a prie for it as well..
    at least the bike seems to pull longer with the retarded timing, just not quite as good response out of a tight turn.