Hi,
Today the superhawk started sputtering and losing power at like 3-4k rpms and 1/2 throttle or something. Here's how it started, I was running low on gas, so I flipped to reserve, then it started choking a little bit at high rpms, like missing or something, I just figured it was low on gas. I filled er up and then it started getting worse, now I can't get over 25mph without it just bogging down to 2k rpms where it will idle. It idles fine, both sides have strong spark, I cleaned the points up a bit, gaps are a bit small but they're still good I say (this happened suddenly), battery is not drained, both sides are def getting gas. I checked each carb slide and needle to see if the needle clip had popped out again like last fall which caused a similar problem (but worse), nope not that.
I'm kind of confused; it's not compression, doesn't seem to be electric, so it's gotta be gas I'd think. The plugs look normal, but it feels like bogging, not lean like choking. Do you have any clues on what I should check next? I pulled the float bowl and checked the main jet on the left, but not on the right, maybe some junk got in there when I had it on reserve and clogged the main jet, which is why it still idles, I'll check that next, it just occurred to me. Maybe it is lean after all, I dunno. Any other advice?
Thanks.
Superhawk Bogging at +3k rpm and +1/2 throttle ?Gas tank "junk" including water settles in the bottom of the tank. Switching to reserve let some of this get into the carbs. If you don't have a fuel filter put one in the line. This will stop "junk" but not water. I would consider pulling the tank and dumping the contents and checking for bit of rust and dirt.
FuelI agree with Cadman that the first guess is fuel. Is there a screen in the petcock on your Superhawk? If it plugs with crud it might let enough gas through to idle, but not enough for higher rpm's. On my Dreams the bowl on the bottom of the petcock unscrews so you can clean the screen.
If there is water it will be in the bottom of your carb bowls. Is there a drain plug? Let us know what you find. I checked both float bowls and jets. Nothing seems clogged all seems normal. I pulled fuel lines from the carbs and turned the fuel on and fuel was only pouring out of one line. Ok. Interesting. I pulled the petcock out and there was a TON of junk in the bowl. I thoroughly cleaned it and reinstalled, however fuel still would not flow freely out of both lines at the same time. It will flow out of each side if I plug the other side but it won't flow out of both sides at the same time. Is this normal? I do notice however that with both lines on the carbs it still fills each float bowl when I turn the fuel on. Idles fine but cuts and misses under load past 3-4k rpms. So maybe its not the petcock after all? What would you try next?
I Narrowed it down to the right side by running cylinders alone with the plug leads off the plugs. Cleaned right carb thoroughly. Put it back together, same problem. Right points have a fat divot in the center. Going to file them down and reset the gaps. Also replaced plugs for good measure. I cleaned petcock well and cleaned right carb well. Could it still be fuel or should I look at electrical now?
Suspecting it may be electrical. I went to clean points and reset the timing. Points have almost 5k miles on them. Right side points have quite a few divots. Tried to sand em out best I could, but now I can't get anything off my test light for the right points and NO spark. I can't find any frayed wires or anything. Could my points just be shot? Can you file them down to the point of no return? New points? I hope this was the problem and not a new problem. I'm confident something electrical is the problem as the right side was the problem side, I've cleaned the fuel system and now I am observing no spark from the same side. Hmm. Where's a good source for cb77 points?
PointsIf you don't get anything with your test light that means there's no power. Were the right side points open when you checked with the light?
Pitting has to be filed flat to make as much contact surface as possible. The contact metal is pretty hard so it is hard to sand flat. Ebay. Ohio Cycle.
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