Hi Noah, and welcome to the forum.

Why do you want to adjust the mixture screws? Or I should say, what is the bike doing that leads you to believe there is a problem with the adjustment screws?

 

I recently moved from 29 palms to Oceanside a considerably difference in elevation. also just replaced the petcock because it was leaking and now the bike wont start unless I twist the throttle a few times then start it and it runs for a few seconds. I think that it will need to be adjusted to sea level and the slow speed screw also could be clogged with some old gas.

 

Save yourself some grief and put some seafoam in it first before you change adjustments on the carb.

 

Spray it into the carb with the air box off or are you sayin to put it in the gas tank?

 

Mix some up in a container, disconnect your fuel line upstream of the carb, drain your float bowl on the carb, close the drain screw, then pour it in the fuel line to fill your float bowl again, then let it sit a few days. I've brought old non running bikes back to life by filling the float bowl with straight seafoam and letting it then sit a few days, then draining and refilling with fuel before trying to start them. They don't always run well at first, but more often than not it will dissolve and pass any gunk. Sometime there's just no other way than to get into the carbs, but that shouldn't be the case with your bike, being a later model unless it's been mistreated or neglected.

 

sounds like a good plan ill get on it and I'll get back to you in a few days about what happened if it worked or not. any other ideas are welcome as well. and if anyone has any idea where the pilot screw is located that would be a lot of help too.

 

Honda Motorcycle Parts 2009 VT750C A CARBURETOR (A-CM-2A-2CM) Diagram
Should be #5 here. Can't tell for sure but looks like its in the throat of the carb, intake side if the engine.

 

The mixture screw is for the idle mixture, and won't keep an engine from starting normally. But it will die out and not idle if there is a problem with the primary circuit. Concentrate on starting with fresh fuel first. Seafoam is a great product.

Here is a diagram and the mixture screw location.

 

ok guys so im back and I drained the seafoam out and crossed m fingers then added some fresh gas to the carb via tube and gave her a twist or two and started it but it was just for a split second. so it doesnt stay running/idling anyone got any ideas what could be wrong? should i get to pulling the botom part of the carb off to get to the jets ? or am I just ultimately screwed? im just trying to get out on the road and ride but im on a budget and im not trying to take it in to a shope to get it fixed, I can do the work myself I just need to know what to do. In dire need of help please and thank you

 

Also I had buddy tell me I probably just need to re-jet the carb since I changed in elevation and that could be my whole problem, any ideas or opinions?

 

How did it run before the petcock change? If it ran fine, I'd be looking there. Is it the correct petcock? Is it open? I know it sounds like a stupid question, but people have forgotten before. Is the vacuum line connected and in good shape?


Sitting on my Shadow making vroom vroom noises.

http://www.hondashadow.net/forum/me...ms/213858-smurfy71/murray-s-ride-16842-picture68314-aug-2017-new-front-tire.jpg

 

It ran fine at a higher elevation. when I replaced the petcock I left the tank off and after I soaked the carb in seafoam I drained it and then filled the gas tube with fresh gas, no tank on or intake box on and then tried to start it and the same thing was happening.

 

Put the airbox on and hook up your fuel tank. They don't run well with the airbox off. Also, when you start it, use the choke as needed until warmed up.

 

You don't think I'd need to adjust the air/fuel mixture screw since I went from 2,000 ft to sea level?

 

One thing at a time. Get it running first. Also, when you start it, keep your hand off the throttle. You should need zero throttle when starting.

 

It will only run for about 5+ seconds maybe longer with the choked completely out but if it goes in the slightest it will die

 

Ok well what if I can't? Say I put it all back together? And it still doesn't want to start? What do I do then? Pull it all apart again and try to adjust the screw?

 

I did it and got it all back together, I pulled the choked and held it all the way opened and it would run for a bit but if it closed it will die

 

sounds like a clogged jet.

 

2000 feet should not change it, I run both my bikes from sea level to 4000+ feet in the mountains here fine.FSM says high altitude is above 6500 ft.Have you taken the fuel line off the carburetor and checked fuel(clogged filter) flow( look for pinched/kinked/split line), with key on if you have a fuel pump(it might not work). What petcock did you use?