carburetors

Happy Thanksgiving weekend fellow SOHC/4 Brethren and Sistren!! I searched this topic for an hour or so and the only thing I found was a passing mention in an unrelated thread that an owner had traced idle problems to short aftermarket slow jets in a CB550... but there wasn't much detail...

Just bought this bike so still working out the proper quirks in starting her up. 79 cb750k w/13k miles, needs choke on start, starts off at good RPMs but within 5-10 seconds it dies. Try to start it again, it sputters, then I gotta rev it and keep the revs up until it warms up enough and I can...

So i did the usual thing when people remove their airbox and put pods on. And i know everyone says that they dont work but o well im trying. Im running 98 pilots and 125 mains. Ive been trying to get it tuned correctly with no luck. Im also running a 4 into 1 exhaust. It seems that in any gear i...

Hi, just recently bought a 1981 CB750 Custom, and the previous owner through some lawnmower air filters? maybe that's what they look like. So I'm wanting to pitch those and get some new air filters. I was wondering if anyone tried to use the K&N RU-2852...

I bought my DOHC about 2 months ago and have started the process of total customization and refurbishing. Needless to say, I have consumed a wealth of information, much of it from forums, regarding various endeavors on the bike. The problem I have found is that the information is out there, it...

Originally had 68 pilot jets and 100 main jets. Got rid of the airbox and exhaust, (now 4-1) So, I went up to 70 on the pilot jets and 105 on the mains. There was some popping and it just wouldn't go after 1/2 throttle. So I went up in size. 80 on the pilots and 140 on the mains. Still not right...

Needing some help here, I have an 81 750f I picked up in a trade. I have been trying to get the motor squared away before I really tear into it over the winter. Here's what I've done so far. New rectifier has it charging great 14.7 at 5k. New carb boot and no vacuum leaks to be found. It does...

Glad to have found this forum and happy to be apart of the cult. I have a '82 CB750 F. I don't know as much as a mechanic does, but I know enough to name the parts of my bike and some of its functions (just a brief on my knowledge) Anyways! Winter is coming... and this is my 2nd winter with...

HI there New man in the forum, so sorry if this is a noob question. I just bought a cb750 k '79, with a banged up gas tank. I want to replace is with a '75ish gas tank. Like attached. Does those gas tank fit, or do i have to do a lot of modifications? And cool forum by the way!! All the...

Hey guys, I just picked up and 81 750f and I am having some running issues. I have a knock from the lower left of the crankcase at idle but goes away completely after 1500-2000 rpm, also my #1 exhaust pipe is getting heat coloring and I'm getting an exhaust backfire from either #3 or #4. There...

I'm seeking information on the difference between U.S.A and European carb richness settings. (just curious) Thanks.

Hey guys! My name is Jon, and I'm new to the forum. I recently purchased a 1977 Cb750k that i bought from a local guy that had already started restoring it and turning it into a cafe racer which i wanna do. he mainly took it apart, sanded the frame, and confused me lol. Anyways, a lot of the...

It's most likely too lean. Removed the airbox and put pods on. Oval chrome cheapos. Ok, Vance and Hines 4 into 1 header pipe with Carpy stainless exhaust tip and baffle (Carpy's, So. Cal exhaust fabricator and bike restorer. World famous locally) May as well be wide open. With the above...

If you follow the gasoline out of the petcock it runs to a thing that is bolted on the carb on the right side. Looks like its got a line going back to the carb and a drain line going out. What is the purpose of this thing? Is it a vac pump or what is it?

Does the 1982 CB750 run a vacuum fuel pump?

I am just getting into this 750 Honda. Would it be wise to lose that air intake box and put on 4 KN filters? What is the take on that being that it would be easier to work on your carbs? Ralphie

Hi All, I'm new to this forum. I have worked on Harley and Triumph motorcycles for over 20 years now. Honda, not so much... But I'm enjoying working on my buddies CB750 for him. I just sync'd the carbs for him. The throttle response is bad, it bogs down. So I tested the lean theory with the...

Hey all, I recently bought a 1981 CB750C Custom. It ran great and had no issues whatsoever. Recently, I removed the gas tank in order to paint it. I also changed the oil and oil filter. After painting it, I put it back in place and reconnected the fuel line to the petcock. Upon doing so, the...

Quick question, will carbs from an 82 cb750 fit my 81 cb750? I don't think they will but I figured I have to ask.