Re: 78 cb750K won't fire up. (1 coil fires other doesn't)
Posted by mitchberry on Sep 10, 2010; 4:59am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/78-cb750K-won-t-fire-up-1-coil-fires-other-doesn-t-tp1425305p1450555.html
post 1 :
"C. ran a brand new wire in place of the old blue one in anticipation of there being a short somewhere in it..
(it still didn't get power to the coils) "
post 4:
"then, in theory, if i just ran a new wire in place of the blue wire, this sucker should fire right up right?
-----------nope --------
i did that the other day with absolutely no luck.... still dead.... "
post 5:
" If i run a completely separate wire from the blue coil, to the blue point, still no spark.... that leaves either the point or the condenser... "
Re-run, what do you mean by "jumper" the point? .. sorry, i didn't mean to sound like a smart ass by copying and pasting these things, i was just wondering if you meant something other than this. -also, i know i typed a LOTTTT in here, and it's easy to miss things reading through it, so i wanted to reitterate it in case this isn't what you meant.
i decided to take a day off from working on this and put new points on my T125 so i can get it running reliably in order to sell it (for money for my 750 project).
check it out!
my T125
my T500 (has been painted black since then)
my hayabusa
and, i dont have any pics on the computer yet of my cb750 (which is what you guys would be most interested in seeing probably.. lololol.
-------
luke.... thanks for the compliments.
i think i mentioned elsewhere that i am a patient man... given the fact i built both of my other vintage bikes ground up, i know that stupid little things can cause a lot of grief.. in fact, i really wouldn't doubt if it's something so simple and minor that i will have to fight from being angry with myself for having not found it immediately... "OH the kick stand has to be up!" or some crap...
It doesn't help that i really don't know anything about the small details of the cb such as those... it could be any number of things... "OH the tires are too low" anything... (i'm positive it doesn't BUT) it could be something as stupid as there being a low tire pressure sensor or something that causes it not to start.... obviously this bike doesn't have that.. but... aside from common sense, i wouldn't know that.. some new bikes have things like that... i don't know the little things that this bike DOES have similar to that... and i won't know until it runs...
on my hayabusa, you pull the clutch before you start it, and then if you put it in gear while the kick stand is down, it kills the motor... kinda embarassing actually if there are people around when you do it.
and despite it has 170 horsepower, it's actually pretty easy to stall it in a launch if you're not prepared for it... say a light turns green and you're not paying attention, so you floor it.. 80% of the time i stall it and piss the people behind me off... also embarrasing..
the absolute MOST embarassing thing on that bike is pulling onto the sidewalk at a grocery store, putting the stand down, and realizing it didn't go all the way down / the bike rolls forward and it starts to fall over and it takes every ounce of strength you have to keep it from hitting the ground, and you're HOPING your foot doesn't slip on the pavement... the whole time in your head you're saying " NONONONNONONONONONONONo NOOOO NOOOOOOOOO" and there's at least one hit girl giggling, and some little kid " HE DUN ALMOST DROPPED HIS MOTORCYCLE!!!" ...
i'm a pretty strong guy, but the center of gravity and height on that bike makes it VERY hard to keep from crashing to the ground if it gets off balance... it's a 500 pound bike as are the cb750's... but, i would have no problem keeping the cb up if it teetered. there are more places to grab it...
well... way off subject... but... i'm not so sure there's much else that can be said about my cb problem right now....
i got the points plate on order... condensers, points, plate... should be getting it soon, and i'll update at that point... though, please continue to comment if you have thoughts or ideas... or.... comments.. lol i'm still open to ideas and will be messing with this thing all weekend...
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/78-cb750K-won-t-fire-up-1-coil-fires-other-doesn-t-tp1425305p1450555.html
post 1 :
"C. ran a brand new wire in place of the old blue one in anticipation of there being a short somewhere in it..
(it still didn't get power to the coils) "
post 4:
"then, in theory, if i just ran a new wire in place of the blue wire, this sucker should fire right up right?
-----------nope --------
i did that the other day with absolutely no luck.... still dead.... "
post 5:
" If i run a completely separate wire from the blue coil, to the blue point, still no spark.... that leaves either the point or the condenser... "
Re-run, what do you mean by "jumper" the point? .. sorry, i didn't mean to sound like a smart ass by copying and pasting these things, i was just wondering if you meant something other than this. -also, i know i typed a LOTTTT in here, and it's easy to miss things reading through it, so i wanted to reitterate it in case this isn't what you meant.
i decided to take a day off from working on this and put new points on my T125 so i can get it running reliably in order to sell it (for money for my 750 project).
check it out!
my T125
my T500 (has been painted black since then)
my hayabusa
and, i dont have any pics on the computer yet of my cb750 (which is what you guys would be most interested in seeing probably.. lololol.
-------
luke.... thanks for the compliments.
i think i mentioned elsewhere that i am a patient man... given the fact i built both of my other vintage bikes ground up, i know that stupid little things can cause a lot of grief.. in fact, i really wouldn't doubt if it's something so simple and minor that i will have to fight from being angry with myself for having not found it immediately... "OH the kick stand has to be up!" or some crap...
It doesn't help that i really don't know anything about the small details of the cb such as those... it could be any number of things... "OH the tires are too low" anything... (i'm positive it doesn't BUT) it could be something as stupid as there being a low tire pressure sensor or something that causes it not to start.... obviously this bike doesn't have that.. but... aside from common sense, i wouldn't know that.. some new bikes have things like that... i don't know the little things that this bike DOES have similar to that... and i won't know until it runs...
on my hayabusa, you pull the clutch before you start it, and then if you put it in gear while the kick stand is down, it kills the motor... kinda embarassing actually if there are people around when you do it.
and despite it has 170 horsepower, it's actually pretty easy to stall it in a launch if you're not prepared for it... say a light turns green and you're not paying attention, so you floor it.. 80% of the time i stall it and piss the people behind me off... also embarrasing..
the absolute MOST embarassing thing on that bike is pulling onto the sidewalk at a grocery store, putting the stand down, and realizing it didn't go all the way down / the bike rolls forward and it starts to fall over and it takes every ounce of strength you have to keep it from hitting the ground, and you're HOPING your foot doesn't slip on the pavement... the whole time in your head you're saying " NONONONNONONONONONONONo NOOOO NOOOOOOOOO" and there's at least one hit girl giggling, and some little kid " HE DUN ALMOST DROPPED HIS MOTORCYCLE!!!" ...
i'm a pretty strong guy, but the center of gravity and height on that bike makes it VERY hard to keep from crashing to the ground if it gets off balance... it's a 500 pound bike as are the cb750's... but, i would have no problem keeping the cb up if it teetered. there are more places to grab it...
well... way off subject... but... i'm not so sure there's much else that can be said about my cb problem right now....
i got the points plate on order... condensers, points, plate... should be getting it soon, and i'll update at that point... though, please continue to comment if you have thoughts or ideas... or.... comments.. lol i'm still open to ideas and will be messing with this thing all weekend...
-Your servant is your master-
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