Topic: 93 750 CARB WORK HELP

[HONDA 550-K]

I need some help here guys. Please.

              I just bought a 93 nighthawk with a 750 engine in it.
      It needs some carb work done to it.  I do not want to just put the original parts back in the carb. Can't I put Bigger jets in it to make it easier to crank And easier to start and run better. I know little to nothing about this so if someone could explain to me what I need to do to make it run rt I would be grateful.

Thanks  Dean

[newday777]

The 93 nighthawk is a DOHC bike....

Is this 750 engine SOHC(Single Overhead Cam) Or is it the stock 93 DOHC (Double Overhead Cam)750 motor?? If DOHC, you are asking in the wrong forum as this is for SOHC bikes.

[Stev-o]

Can't I put Bigger jets in it to make it easier to crank And easier to start and run better.

No!   Larger jets will not change these issues.  Read this for some more info...

https://www.uti.edu/blog/motorcycle/motorcycle-carburetors#:~:text=How%20Does%20A%20Carburetor%20Work%3F,-So%2C%20what%20does&text=A%20carburetor's%20job%20is%20to,engine%20via%20the%20intake%20valve

[HONDA 550-K]

ALAN.



I'am lost please tell me what section you are talking about. I have no ideal what motor this is I know you do.

Your rt the people on here will help very quickly. Thank you for your help

Dean

[HONDA 550-K]

          Going to miss this section. You guys are quick to answer any question and I mean fast. I joined the Nighthawk forum and had a few questions and that was 2 weeks ago and nobody has answered yet.

I thank everyone for being so kind. Bunch of great guys that love motorcycles on here you to Alan.
I have two at 70 years old
A 2007 Suzuki 1250 Bandit and a new to me 93 750 Honda Nighthawk

[HONDA 550-K]

ALAN.


No problem Alan. Actually I like you. Your help at first got me started on the rt track and I'am grateful. You are someone who steps in an tells it like it is. You will half to cruise over and see how I'am doing on the other forum.

Thank you  Sir.  Dean

[Alan F.]

Ok Dean, our moderator moved this thread to the correct section, so tell me about your blue Nighthawk.

[HONDA 550-K]

ALAN.


Sorry I did not get rt back but I had 2 doctor visits back to back. I may be barking up the wrong tree on this. Would putting bigger jets in it make it easier start and crank & warm up faster or should I just go with all original parts. This engine is so slow to warm up. It needs the carbs done. The tank is very clean inside  no rust at all. I took it off and cleaned it out really good & also put a new pet cock on it. Fresh non ethanol gas with Yamaha ring free & Yamaha stabilizer. Also put all new hoses With a Russell in line fuel filter on it.

Thanks  Dean

[Alan F.]

Does your bike still have the stock exhaust? Clean Air filter?

My 750 NH had a Vance & Hines 4 into 1 pipe when I bought it but it had never been rejetted. I went up 2 sizes from stock on all jets and it ran great with 55mpg when I was gentle on the throttle. It would hit reserve between 200-215 miles which from what I've read is very good.

Slow warm up seems to be pretty normal. At 45F I'd have to give it at least 5-7 minutes of full choke before I could open the choke and let it idle. Warmer days it would be quicker, but only above 85F could I start it cold without choke for a minute or two.

[70CB750]

          Going to miss this section. You guys are quick to answer any question and I mean fast. I joined the Nighthawk forum and had a few questions and that was 2 weeks ago and nobody has answered yet.

I thank everyone for being so kind. Bunch of great guys that love motorcycles on here you to Alan.
I have two at 70 years old
A 2007 Suzuki 1250 Bandit and a new to me 93 750 Honda Nighthawk

Same experience. The forum cb750c is dead in the water but they have good FAQ section.  I joined thereto bring to life 82 CB900C.

 Anyway your carbs probably just need good cleaning and you dont need to take them apart completely for that.    As posted above, these bikes need choke to warm up, its just the nature of the beast.  Good luck and picture would be nice