Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
We noticed you are blocking ads. DO THE TON only works with community supporters. Most are active members of the site with small businesses. Please consider disabling your ad blocking tool and checking out the businesses that help keep our site up and free.
Hello, I am just working on my brand new used 83 CB550SC nighthawk. I got some of the electrical problems solved enough to get it to fire. But now it will idle and rev up with the choke but if I use the throttle at all the engine dies... I have spark and compression all across the board but cylinder 2 does not seem like it is firing and cylinder 3 seems weak. I am judging this by them not putting out the exhaust gas like cylinders 1&4 (the exhaust is off the bike). My mind tells me that the carbs are probably clogged or out of adjustment, is my thinking correct? Any others areas you guys would suggest I look enforce pulling the carbs off?
+1 clean the carbs. sounds like its probably lean. the reason it dies when you add even more air by cracking the throttle open. rpm picks up on the choke = less air, more fuel.
I got the carbs put back on the bike (no air cleaner or exhaust) and got the bike fired up. It ran pretty good (even better now) on choke but it still dies the second you touch the throtle. The 2nd cylinder seems to be furring as now there are small blue flames that shoot out the exhaust on that cylinder only. Cylinders 2 and 3 still don't seem to have the exhaust force as 1 and 4 though. The carbs were not dirty inside at all. Just a little black sediment in a few of the bowls but it was small in quantity and very fine.
Is there a possibilty of a gas shortage?
Had the issue with a gooked up tank/petcock.
Could be also a inline filter restricting gas to one or the other carbs.
Is there a possibilty of a gas shortage?
Had the issue with a gooked up tank/petcock.
Could be also a inline filter restricting gas to one or the other carbs.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.