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Offline muddy8jeep8

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New Guy needing help
« on: January 10, 2011, 11:08:38 AM »
I have a 77 supersport 750 I think they call it a cb750f?  If someone could explain difference for f and k that be great or give me a link.  and yes ive tried the search. Im sure someone will tell me "use search bar"

Im used to Harleys I have a 65 panhead im building now.  So all the jap stuff is pretty new for me so bear with me.

I want to rebuild/clean the carbs.  even though the carbs look pretty clean inside. The bike is running on only 3 cylinders and Ive narrowed it down to what i think is the carbs.  Ive got good spark and compression.  Is the a good write up step by step how to disassemble clean and reassemble then sync them?  I hate to pay someone to do it when i could do it myself.
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Offline Roach

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Re: New Guy needing help
« Reply #1 on: January 10, 2011, 11:15:45 AM »
use the search button ....lol jk ;D

go to the front page in your top left corner click on the cb750 then go down to the bottom there is a thing that says model
guide it will tell you what the difference is in detail.
« Last Edit: January 10, 2011, 11:17:19 AM by Roach »
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1978 CB550K Cafe Racer

Offline flybox1

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Re: New Guy needing help
« Reply #2 on: January 10, 2011, 11:19:05 AM »
welcome to the madness  ;D
Roach beat me to it...
a bunch of good info on differences 750K vs F here:
http://www.sohc4.net/index.php/cb750

and carb info here in the FAQ pages:
http://forums.sohc4.net/index.php?board=11.0

yes, you should to do them yourself, and you'll do a pretty fine job at it too.
one carb at a time.  dont mix and match parts between bowls.
use only OEM HONDA parts if you need to replace anything.
most brass jets can and should be reused. might want to replace o-rings tho.
clean, clean, and more clean, set float heights, and recheck them...

post pics of your bike! :)
we like pictures.
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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 muddy8jeep8

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Re: New Guy needing help
« Reply #3 on: January 10, 2011, 11:38:02 AM »
ok thanks guy for the fast response.  Its a cb750f2.  Here are some pictures.



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Offline greenjeans

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Re: New Guy needing help
« Reply #4 on: January 10, 2011, 12:43:37 PM »
Wow...that's really clean.  Nice looking F.

For the carbs, you can do it.  It's an easy job - just tedious.  Just take everything apart and keep them separate.   The Japanese are really clever - if you look at them long enough, they only go back together 1 way.   You probably won't have to buy new jets as they seem to last forever.  You might just need some new gaskets.
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Yep, I'm the kid that figured out how to put things back together...eventually.
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