That sound at 0:50 That is the fuel pump. My thundercat makes that sound but the battery is fine. 12.4 volts starts right up. But cylinder 1 is misfiring in certain conditions. Could the fuel pump be related?
Good morning, thank you for commenting. This bike had been sitting for some time, the client knew the fuel pump was defective when he dropped it off. It was leaking badly and not priming well. That noise you heard is 100 percent the fuel struggling to prime. The pump will often struggle like that with a low battery so it’s good to confirm that the battery is in good working order before changing the pump. The customer supplied a pump in this case because it was leaking badly. If the battery is good as it is on yours and it’s making that noise it is most likely a weak pump. If you are having issues with just one cylinder i would be looking at the carburetor for that cylinder. Could be simply a clogged pilot jet. You’ll see that at low rpm. Clean the main jet and emulsion tube also while you are in there and check the float height . Also look for any air leaks, cracked hoses or hose clamps not seating properly. Good luck and thank you for watching.
@OVVMtoddspurrell Thank you very much. I changed the sparkplug on that cylinder and plan on changing the coil next if needed. The carburetor boots on all 4 cylinders look like they could use a swap, but I would like to try the coil first. Bike runs great when it's cold but when it gets hot I'm thinking the coil craps out, and wet fouls the plug making it worse. I would actually love to take the carbs out, clean them and replace the boots. But I'd rather ride haha. Thank you again for responding.
@@611racing you could try swapping coils to see if the problem follows the coil to the other cylinder, then you eliminate a carb issue if the #1 cylinder improves. If the boots are really bad you could try spraying around them while the bike is idling and see if the rpm changes. Eliminate an air leak.
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You did an excellent job maintaining the motorcycle.
@@0215gabriel thank you.
That sound at 0:50
That is the fuel pump.
My thundercat makes that sound but the battery is fine. 12.4 volts starts right up.
But cylinder 1 is misfiring in certain conditions. Could the fuel pump be related?
Also did the new pump make that noise? Ty for the video.
Good morning, thank you for commenting. This bike had been sitting for some time, the client knew the fuel pump was defective when he dropped it off. It was leaking badly and not priming well. That noise you heard is 100 percent the fuel struggling to prime. The pump will often struggle like that with a low battery so it’s good to confirm that the battery is in good working order before changing the pump. The customer supplied a pump in this case because it was leaking badly. If the battery is good as it is on yours and it’s making that noise it is most likely a weak pump. If you are having issues with just one cylinder i would be looking at the carburetor for that cylinder. Could be simply a clogged pilot jet. You’ll see that at low rpm. Clean the main jet and emulsion tube also while you are in there and check the float height . Also look for any air leaks, cracked hoses or hose clamps not seating properly. Good luck and thank you for watching.
@OVVMtoddspurrell Thank you very much.
I changed the sparkplug on that cylinder and plan on changing the coil next if needed. The carburetor boots on all 4 cylinders look like they could use a swap, but I would like to try the coil first.
Bike runs great when it's cold but when it gets hot I'm thinking the coil craps out, and wet fouls the plug making it worse.
I would actually love to take the carbs out, clean them and replace the boots. But I'd rather ride haha.
Thank you again for responding.
@@611racing you could try swapping coils to see if the problem follows the coil to the other cylinder, then you eliminate a carb issue if the #1 cylinder improves.
If the boots are really bad you could try spraying around them while the bike is idling and see if the rpm changes. Eliminate an air leak.