It's not a design fault, it's called a "wasted spark" ignition. Plug fires every revolution of the crank, even on the exhaust cycle. It's common on British bikes as well.
On 5/25/2015 9:55 AM, Mac McConnell-Wood via KRnet wrote: > Back in the '60's when Ho...a's- started exporting , - the squadron I was > on in Malaysia bought a whole bunch of Cubs. > Were a bit hacked off when the plugs started failing after a short time > -our resident engineer reckoned that due to a design fault the ignition was > firing twice in the 4 stroke cycle -and burning out the plugs -is this > possible? > > On Mon, May 25, 2015 at 1:52 PM, Chris Kinnaman via KRnet < > krnet at list.krnet.org> wrote: > >> Years ago I raced motorcycles and OEM Japanese coils were notoriously >> cheesy, some brands of bikes worse than others. I never raced new bikes so >> they all had some time (but in many cases, not much time) on them when I >> got them. After some frustrating issues I made it a practice to replace >> coils right away with new ones or, better yet, performance coils from Accel >> or whatever. I would think current coils are better quality than I >> experienced decades ago but maybe not. >> >> Chris >> >> >> On 5/24/2015 11:25 PM, Mike Stirewalt via KRnet wrote: >> >>> Are these green Great Plains >>> coils that sensitive to gap? Are they wearing out and getting weak? I >>> think they are motorcycle in origin and I've never noticed coils ever >>> wearing out on my bikes . . . . >>> >> >> _______________________________________________ >> Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. >> To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org >> please see other KRnet info at http://www.krnet.org/info.html >> see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change >> options >> > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > >
