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  • Electrex world kit for Challengers

    I realise that I've been away for a while, but I seem to remember they made a kit for Greeves engines as well as Villiers, but there seems to be no trace of them on the web site!

    STK-990 is in my notes from 2 years ago - anyone use of these?


    Cheers,
    Andrew

  • #2
    Hi Andy

    I fitted an Electrex STK 990 to my 360 Challenger two years ago and have had no problems with it.

    It replaced a Nametab system which had started to misfire.

    Regards
    John A - 268

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    • #3
      I believe all their villiers units are sold through Villiers Services. Maybe they can help you,

      Brian.

      Comment


      • #4
        I've got one aswell

        Hi,

        I've got one aswell on my 360, it starts and runs lovely with the kit fitted, no kick backs on starting either

        Scott

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        • #5
          Hi John-boy, andy, scott, my nametab pick up coil died at the start of the earlier dorset scramble this year, missed the whole affair, damn good track too, but i did get a cheap replacement..., electrex world units do look a bit more robust though, have to say, that`ll be my next choice if any further problems.
          Have got the motoplat on my project qub, don`t know how reliable they are, just old transistorised kit i guess. we`ll see...

          Comment


          • #6
            Electrex world kit for Challengers

            Hi Andy in the latest issue of classic dirtbike (32) out a couple of weeks ago Electrex world have an advert and in it they have a kit for Challengers STK990
            price is £195 ,hope this helps Simon

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            • #7
              The PVL unit works well on racers - I had one on my Silverstone. I don't know if they'd be robust enough for scrambling conditions - but someone on here will know.

              Bob Horton used to source and fit them - see his advert in LL for contact details.
              Colin Sparrow

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              • #8
                I have heard of someone fitting a PVL on, I think, a Griffon. Problem was lack of flywheel effect, not a problem, of course, with the Silverstone.

                I have Electrex on my Anglian and also on my TZ Yamaha and they both work perfectly.

                I'm trying to persuade Peter to make one for the later Griffons as all of my Motoplat bits have bitten the dust and if you get one bit fixed, something else will fail.

                Comment


                • #9
                  I have a PVL on my 360MX4, and it works fine apart from starting. The spark is so weak at kick-over speeds that its hardly visible, aparently this is normal. I'll phone Electrex to see if they still do the kit.

                  Comment


                  • #10
                    Electrex Ignitions

                    Andy,
                    My (limited) experience of full electronic ignitions is that they all give pretty weak sparks when viewed outside. The worst of these is the Electrex. On my BSAs I have to check the spark at night to be able to see it, it appears to work OK but if the engine stops you tend to check for a spark as the first thing. If you can't see it in a sunny paddock you don't know if it's working or not.

                    The PVL has a good reputation but I don't like the very light flywheel used, a personal preference.

                    Boyer which is not totally electronic gives a better more visible spark especially when used with a battery but I don't think this is acceptable or convenient for most Greeves riders.

                    Motoplat is good when it works and uses a nice heavy flywheel, this is my personal favourite.

                    You could probably use an Interspan unit and instantly double the cost of the bike.

                    I don't have any experience of Simon's unit or any of the other currently available systems.

                    The ultimate, of course, is to graft a BTH magneto onto the Greeves engine.

                    Druid

                    Comment


                    • #11
                      Originally posted by druid View Post
                      they all give pretty weak sparks when viewed outside. The worst of these is the Electrex.
                      I thought the a fat spark at kick over was one of the selling points of the Electrex system!

                      If its no better that the PVL, then I'll just stick with that.

                      Cheers,
                      Andrew

                      Comment


                      • #12
                        The spark generated by an electronic system is a 'white spark' and not readily visible in daylight! You get used to this and I find it no problem. It is all to do with the way the spark is produced. Peter (Electrex) did explain the principle to me once and I think I might have understood it at the time. If you really want to find out if there is a spark, simply poke a part of your anatomy (eg. finger for those living outside of Essex!) in the plug cap and give it a kick. We had a mechanic in our GPO garage who would check for a spark by drawing a steady spark to his finger from one of the plug leads with the engine running! Wonder if you could see an Electrex spark doing that??!!

                        I was alerted to this by Pete Smith. He fitted a system to his Scottish and the first thing he did was check for a spark and he couldn't see one. He rang Electrex and they said 'but does the bike go?' He said he could see no point in trying to start it if there was no spark. They told him to try it and it started first kick!

                        They'll be fitting computers in Scottish's next and THAT will be the end of the world as we know it! Looked at my mate's 200cc KTM today. Digital display, ECU, fuel injection, real screamer, no use below 50 mph! Simple looking little bike but totally unserviceable (or understandable) by a normal human with no specialist (extremely expensive) diagnostic kit so what is the point of it? Give me a 250 Villiers any day! The moral of this story is: 'things can only get more complicated'!

                        Comment


                        • #13
                          Ive discovered that the easiest way to check that the electronic ignition is ok on a system where you can't easily see a spark from the plug is to put a 'old fashioned' car type strobe meter 'in line' between the spark plug cap and the spark plug. Kick the bike over and the strobe meter lights.

                          Sadly this method doesn't tell you that the plug is ok. There are of course other ways of checking the plug is working.

                          Comment


                          • #14
                            electronic ignition

                            I fitted a nametab system on my griff and used an NGK plug. Checked that i had a spark but it was very weak and could hardly see it in daylight. It took about 20min to get it fired up. Checked the timing as per nametab instructions several times and all was ok there. Had a chat with a mate who said to use a Champion plug and it fired up on the second kick. Mick

                            Comment


                            • #15
                              condensation build up.

                              Hi mick, one thing i found with the nametab on my t/port, is that depeding on how you fix the outer flywheel cover, you get a lot of condensation build up inside.
                              After only a few months of fitting mine, corrosion had set in on the coil & probably led to it failing, i remove it after every event now, £80 a time to replace..

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