Some time ago Hobo was stumped on a no go N engine I like others though this is
different as he usually is the one helping. Now Im not a expert like him but I kept
things running for close to 45yrs. 6 years ago my 52 N which had run fine for a long
time no problems.One day would not go,fire gas everything was in order. We worked at
it for about 4 hrs threw no new parts at it had nothing wrong as to go in that
direction. Went through 4 batteries.Anyway it finally took and never had any
problems till today.My buddy said spark was snuffed by cyl pressure.I knew it was
the same thing again. I did replace gas soaked plugs and needle and seat float was
perfect needle was steel put rubber tipped one in. My buddy who helped me the 1st
time saw this proven in a spark plug tester in the 60s and said this was my problem
then. This is something I found on the net----- No spark under compression
I have been riding motorcycles since the late '60s and racing them since the early
'70s and have run into this situation several times,either experiencing it first
hand or seeing it on bikes of friends and I can't understand how it can be.The
situation is when a spark plug will produce a really strong spark while not in the
spark plug hole but evidently is not firing while under compression,when placed in
the head.For years I've heard guys say that this does indeed happen and,as I said,it
seems to be true sometimes,but I don't understand what compression has to do with
the ability of the spark to fire across the plug gap.A buddy just had this happen on
a Ducati GT500.Steve Chancey, Chattanooga,Tn. This guy is not talking Low
Compression as best I can tell. Anybody have any ideas I have good thumb compression
and dont suspect it anyway.Comments or like problems welcome
different as he usually is the one helping. Now Im not a expert like him but I kept
things running for close to 45yrs. 6 years ago my 52 N which had run fine for a long
time no problems.One day would not go,fire gas everything was in order. We worked at
it for about 4 hrs threw no new parts at it had nothing wrong as to go in that
direction. Went through 4 batteries.Anyway it finally took and never had any
problems till today.My buddy said spark was snuffed by cyl pressure.I knew it was
the same thing again. I did replace gas soaked plugs and needle and seat float was
perfect needle was steel put rubber tipped one in. My buddy who helped me the 1st
time saw this proven in a spark plug tester in the 60s and said this was my problem
then. This is something I found on the net----- No spark under compression
I have been riding motorcycles since the late '60s and racing them since the early
'70s and have run into this situation several times,either experiencing it first
hand or seeing it on bikes of friends and I can't understand how it can be.The
situation is when a spark plug will produce a really strong spark while not in the
spark plug hole but evidently is not firing while under compression,when placed in
the head.For years I've heard guys say that this does indeed happen and,as I said,it
seems to be true sometimes,but I don't understand what compression has to do with
the ability of the spark to fire across the plug gap.A buddy just had this happen on
a Ducati GT500.Steve Chancey, Chattanooga,Tn. This guy is not talking Low
Compression as best I can tell. Anybody have any ideas I have good thumb compression
and dont suspect it anyway.Comments or like problems welcome