J&P Cycles Motorcycle Community

Participate in our motorcycle forums, view photos, and read up on our motorcycle tech articles.
Welcome to J&P Cycles Motorcycle Community Sign in | Join | Help
in Search
Latest post Sat, Jun 10 2006 7:38 AM by owevans. 14 replies.
Page 1 of 1 (15 items)
Sort Posts: Previous Next
  • Fri, Jun 9 2006 11:14 AM

    • Max-Fab
    • Not Ranked
    • Joined on Mon, Oct 24 2005
    • Posts 19

    Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    What are the best sparkplugs to use in a 1975 FLH Stroker? Front cylinder wet. Oil on sparkplug (Using Champion J12YC) Dogs out. Fouls plug alot. No power.
  • Fri, Jun 9 2006 11:24 AM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    if it's oily, chances are it's time for rings. you can go with a platinum plug, they resist fouling better than a standard plug, j12yc crosses to a 1948-1974 spark plug, see 380-637 or 380-822

     

  • Fri, Jun 9 2006 11:26 AM In reply to

    • owevans
    • Top 25 Contributor
    • Joined on Sun, Sep 23 2001
    • Monterey Bay
    • Posts 1,766

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    I tried them all in my hot rod shovel and I get the best performance with Beru Sivlerstone - DS-242113 short // // - DS 242112 long in my dual plug set-up I'm runnin long abd short plugs, I got 20,000 miles since my last re-build and have not fouled a plug yet. hope this helps, .................o~`o

     

  • Fri, Jun 9 2006 11:30 AM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    those beru are good plugs, but they are non resistor plugs, and can damage some electronic ignitions if not used with the nology hot wires

     

  • Fri, Jun 9 2006 11:57 AM In reply to

    • owevans
    • Top 25 Contributor
    • Joined on Sun, Sep 23 2001
    • Monterey Bay
    • Posts 1,766

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    I'm runnin a Crane Hi-4 single fire set-up with Crane Fire-Wires and a Dyna 4 tower coil (2 coils in 1) with a Spike 41 amp. charging system, so far this is the best the ol girl has run in the 28 years it's been on the road. knock on wood, ...................o~`o

     

  • Fri, Jun 9 2006 12:13 PM In reply to

    • FX
    • Top 10 Contributor
      Male
    • Joined on Sun, Mar 12 2006
    • Tonawanda NY
    • Posts 4,433

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    Max: Steve's right. Time for a top end. What ignition are you running?

    FX

    Don't force it, get a bigger hammer.

  • Fri, Jun 9 2006 12:45 PM In reply to

    • Max-Fab
    • Not Ranked
    • Joined on Mon, Oct 24 2005
    • Posts 19

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    fx: New rings - Newly rebuilt only 43 miles on motor. Steve: Is the 380-822 the 3332 NGK? Is the 380-637 similar to the Bosch 7516? Just got new Accel wires don't really want to put another $100.00 in wires. Anyhow which plugs and which Nology HotWires would it take. Would need to buy extra Beru plugs to carry around. Need short plugs similar to J12YC. These iron cylinders aren't like the new aluminum ones. Anyhow, travel the back mountain roads of West Virgina, they only carry AC Delco in this part of the woods. Don't even carry J12YCs. If ya ask them if they carry Accel they look at ya stupid and say "Ner herd dove um"
  • Fri, Jun 9 2006 12:59 PM In reply to

    • Max-Fab
    • Not Ranked
    • Joined on Mon, Oct 24 2005
    • Posts 19

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    Steve: Does J&P carry the NGK platinum? I think that is #5858? Thanks for being there with your help. Appreciate it.
  • Fri, Jun 9 2006 1:13 PM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    380-637 is the autolite platinum, not bosch, it's what i run in my own bike. don't seem to have a listing on the ngk platinum, don't know why, got some listings on the iridium, but not for that model. with only 43 miles on the build, the rings probably aren't seated in yet, hence the oil fouling. the problem should go away soon, as the rings seat up. if it were me, i'd go with the autolites and not worry about the nology wires

     

  • Fri, Jun 9 2006 9:14 PM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    ngk platimum plugs no. is bpr5evx-11
  • Fri, Jun 9 2006 10:07 PM In reply to

    • Trashz
    • Top 50 Contributor
    • Joined on Mon, Dec 20 2004
    • Posts 967

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    Max, an old trick I've seen used to speed break in is to stick a richer jet in it. Not too rich though. I'd wait 100-120 miles and see if it doesn't improve before I did that.
  • Fri, Jun 9 2006 10:42 PM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    Bosch WR 9 FP NEVER Fould one In my bendex fouling 1974 Shovel.
  • Fri, Jun 9 2006 11:10 PM In reply to

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    WR9FP Bosch Platinums get my vote for an early Shovel too!!! Can get them at any auto parts store cheap enough nowadays. For those with later Shovels using the longer plug, it's WR8DP.
  • Sat, Jun 10 2006 1:02 AM In reply to

    • whrd
    • Not Ranked
    • Joined on Mon, Jul 3 2006
    • Posts 3

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    G'day there Max-fab, I've got a '79 FXEF Fatbob factory 1340, that I rebuilt last year Flowed her heads and put a crane cam in, I'm an x auto-sparky,I run points, (can't fix electronix on da side of da road!)I was running Champions,getting a similar prob to you although not to the point of no power, anyway I tried the Splitfire SF426E and Bro what a difference! I'm converted, I ride my bird hard and she just loves it! and if I can get these American made plugs way down under here in New Zealand you'll git 'em where you are. Good luck and happy SHOVEL trails!!!! Whrd
  • Sat, Jun 10 2006 7:38 AM In reply to

    • owevans
    • Top 25 Contributor
    • Joined on Sun, Sep 23 2001
    • Monterey Bay
    • Posts 1,766

    Re: Best Sparkplugs for a 1975 FLH Shovelhead Stroker

    I dont get all the woopla about runnin ele. ing. I ran points for decades and had point/condencer failure a couple of times, so thats why I carried a spare set in my saddlebags. In the last 10 years or so I've only seen a couple ele. ing. failure. and since I converted the shovel over to ele. ing. when I installed it, I also put a spare sendin unit in my saddle-bags they do make a couple of el-cheapo models that will work with a crane hi-4 system. besides the cost, I dont see a real difference between carring a set spare of points over a spare ele. ing. module. ,o2, ...........................o~`o

     

Page 1 of 1 (15 items)