Although the CB 750 I bought ran , the carbs are leaking badly. I have never rebuilt a carb and that has its allure as a learning thing, yet I am getting older, can't see small stuff very well and want to move this project ahead.
The carb rebuild kits cost about $80.00 but I just found rebuilt carbs for $200.00, so my question is : Is it worth $120.00 to do it yourself or should one just go with a rebuilt
Never done it before and can't see all that well?
I'd go for the rebuilt units. If one (or more) is haywire you should be able to exchange it without extra out of pocket expense.
Not so if you do the work.
Lonnie
$200 seems a very good price.
I did the rebuild myself ('75 CB750K) with a rebuild kit.
Not so difficult job although I cannot read fine prints on spray paint can or medicine bottle without the help of reading glasses.
You just disassmeble one carb at a time and dip them in carb cleaner or boil in lemon juice. Ultrasonic cleaner is a plus (I don't have it).
It depends on how bad your current carbs are. If floats are holed, you need to buy them. I don't think slides are worn too badly like Amal carbs on brit bikes.
What year is your CB? Later year models have pumper carbs I believe, which is more complicated.
Rebuilt carbs or DIY, you need to sync them after you install.
You can go to sohc4 forum for help. It's a great site for Honda SOHC4 owners.
Thanks for the link and advice. To me learning is 1/2 the fun, and $$ is tight, but also don't have much time right now. I guess when I really need them I will have to make up my mind.
The bike is a 80 Custom, but not much but the engine, gas tank and headlight will be original stuff.
1980 custum. That's DOHC, correct?
Sorry then SOHC4 site will not be much of a help. But I am sure there are DOHC CB sites on the Internet.
That year model has CV carbs.
I guess you can take a look at the current carbs first, then decide.
You can buy parts like diaphragms from Part's More ( https://www.partsnmore.com/cat_index.php?model=cb750_900_1100_dohc&category=carb)
If this rebuilt set is from reputable people, then all the necessary parts will be replaced. On the other hand, if it's from some one you don't know, then maybe he just disassembled, cleaned up everything, and assembled them again w/o checking the parts condition..?
I've got thye same problem. 81 CB 750 that has vacuum leak somewhere in the set up. Won't idle correctly. Carburator cleaner eats up the little o-rings and causes the vacuum leak. If you have to dis-assemble the rack you're looking at a major job get them back together correctly and adjusted. When I get the extra cash I'm gonna pick-up a set that has been rebuilt and bench tested.
Dick
I guess I have to agree with Shigeo here. If you rebuild yours or have a local shop do it, you know what you have. If you buy a set, you may well be spending money on something no better than what you already have.
Look in the want ads. Every bike out there with running problems is advertised as "needs carb cleaning". Nine times out of ten, it has a cracked rubber mount, but the first thing anyone does is "rebuild" the carbs.
If you aren't comfortable doing it yourself, find a local shop you can go to.
Mike
Ya, I am a somewhat of the mind that if I do it myself I know what I got. I have in the past had "professional work" done that was totally trash....most recently at the local HD dealership where I ended trying to troubleshoot someone else's poor work.
Probably won't get this running this riding season anyway so maybe it is a good winter bench project.
