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Author Topic: 72 cb750 "Dirty Fingernails"RUNS!!!!!  (Read 6924 times)

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Offline flybox1

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Re: 72 cb750 "Dirty Fingernails"
« Reply #25 on: May 06, 2012, 06:42:24 PM »
^ that brass cowl reminds me of medieval armor  8)
Cool
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #26 on: May 21, 2012, 10:59:54 AM »
lots of progress,put in the motor(all by myself thank you),carbs,oil tank,coils ,harness......
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Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #27 on: May 21, 2012, 11:00:48 AM »
more :D
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline tweakin

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Re: 72 cb750 "Dirty Fingernails"
« Reply #28 on: May 21, 2012, 06:11:57 PM »
Great progress Bart!
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Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #29 on: May 22, 2012, 08:09:41 AM »
Thanks.last night I was sorting my wiring and switches and reg/rect,starter solenoid,etc.I have a real nice right hand control from a 78 but the harness  is a 72,I will have to rebuild the 72 switch.Can I use the later one?The wires are there,2 blacks,yel/red,bl/wh.??I'll make it work.This is a bastard of a bike anyway.One thing I am NOT doing is,cutting the wiring harness.
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #30 on: May 24, 2012, 08:41:08 AM »
stripped the paint off the top triple and dash,I'll have the front forks on tonight.anyone know which wires I need to connect to start my bike,It is a mystery motor and I dont want to keep putting the bike back together until I'm sure the motors ok??I have to use a later control/start switch since my original is toast,pics of the 2 different switches and wires?
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline brandEn

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Re: 72 cb750 "Dirty Fingernails"
« Reply #31 on: May 24, 2012, 08:56:11 AM »
Here are some wiring diagrams. If you know how to read them it should not be to hard to figure out. I think the CB750 wiring is pretty similiar from year to year. I know some of the early models had a safety start switch or something. Hope these help.
http://www.oregonmotorcycleparts.com/diagrams.html
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Offline xsmooth69x

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Re: 72 cb750 "Dirty Fingernails"
« Reply #32 on: May 24, 2012, 01:35:18 PM »
awesome build i have a 72 cb750 waiting to get built!!!! so i had to drop by and take a peek

build is going great

just make sure not to lose the spacer washer for your top triple tree. ive seen a ton of them tightened down and they snap and those unicorn triple tree tops are expensive!!!
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1975 CB550 (FINISHED?!?!?)
first motorcycle ever!!! ow and i dont know how to ride it either :D

raw rust rice venti quad shot cafe racing latte project aka my build..... http://forums.sohc4.net/index.php?topic=88853.0

black and white equation godzilla chalkboard 
1972 cb750 - next in line for some <3

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #33 on: May 24, 2012, 08:16:40 PM »
uh what?I put it on last night,the spacer??I think I did it right,Do you a pic of the spacer?
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"
« Reply #34 on: June 04, 2012, 08:48:50 AM »
UPDATE;So,The bottom end on my F motor isnt shifting through the gears,but the bottom end on my 72 motor is smooth,shifts,kicks etc.which I already have down to the short block,I will take the top end off the F motor,do the 836 kit I have laying around,do the Hondaman porting,HD studs,Valve springs,oil cooler.I knew it was too good to be true,but now I have an excuse to build a stronger motor.Time and money
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #35 on: June 17, 2012, 12:51:24 PM »
Well I admit i'm a pessimist.I got the Fukker to fire up and run strong today!!!!Happy fathers day to me.The kids at his grandparents,wife's out shopping,just me and the garage.I sat and contemplated my dilemma,so i went over to my 73 and shifted the gear change as it sat there and I realized you can go down,neutral and up one.I was wrong all along on the trans on my project(I hope)so i Kicked it about 10 times without power, put power to the coils,gas,kicked it and it fired right up,almost easier than the bike I ride(??)It ran strong,idled fine,sounds mean.God i love Cb750's.Or Honda for that matter.Now,all I have to do is make the later on/off starter switch work with the 72 harness and I;m golden.:)All the rest is gravy.Needless to say,I'm Psyched!!!
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #36 on: June 17, 2012, 12:55:18 PM »
so know I have the original 72 motor half apart,so I will slowly build an 836 and take my time while I have my stock 73 and my mongrel 72 with the F motor.
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline tweakin

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #37 on: June 17, 2012, 06:24:00 PM »
Great work my man. 
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Offline Gurp

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #38 on: June 18, 2012, 12:46:40 AM »
Great project.i bet that 836 will be bad ass lol.
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slow Progress 74 cb550.

Poor boy chop 73 CB500 chop

Future project 77 Cb750 Amen Savior

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #39 on: June 18, 2012, 03:27:59 PM »
this is going to be one nasty beeeotch 8)
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #40 on: June 27, 2012, 07:04:36 PM »
so i put on the velocity stack/bellmouth rubbers from one of my airbox's,and kicked it over ,WHOOM!wow,I know its an F motor but,I think there may be more to it.my wife says'what did you do to it'?I showed her what a difference it made,runs good,idles great,sounds awesome.Got me motivated again.
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its better to regret something you have done,than something you havent.Except playing with explosives.

Offline lucky

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #41 on: June 27, 2012, 07:09:33 PM »
To me Ratbike is just someone that cannot even use a spray can properly.
Even if you have very little money you can make a great looking bike.

Just take your time.
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Offline brandEn

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #42 on: June 27, 2012, 07:14:02 PM »
Looking good Bart!
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Offline bikerbart

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Re: 72 cb750 "Dirty Fingernails"RUNS!!!!!
« Reply #43 on: June 28, 2012, 09:08:34 AM »
yeah,but I like how sh*tty it looks
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its better to regret something you have done,than something you havent.Except playing with explosives.
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