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5 Posts
I bought this bike from a guy who put it down 20 years ago and never touched it again. Over the last few months I've decided to make this bike my hobby and gone through the whole bike replacing every piece of plastic, rubber, or gasket. I'm so close to getting it idling but it just refuses to idle without just a little bit of choke, even after being plenty warm
I've cleaned both the carbs in chem dip for 24 hours each, rinse and blowed out with compressed air, I ran a wire through each one after that to make sure everything is clear. I've triple checked and cleaned all my jets.
Here is a video of it running and stalling with out choke.
Parts I've replaced:
Carbs:
Float gasket
Float
Float needle
Accelerator pump diaphragm and oring
Both the air valve diaphragms and orings (forgot what these are called)
And all the other plastic bits.
New oil and spark plugs. New air filter in the stock air-box.
I've replaced the intake boots and o-rings.
I've rebuilt the engine and replaced all the gaskets and piston rings, with no oil leaks with good compression.
I've checked for vacuum leaks around the boots and petcock but haven't found anything.
I bypassed the fuel valve and filled the carbs manually to see if they're just not getting enough fuel, no dice.
I might be missing something but I feel like I've tried everything, and it's driving me crazy. These carbs don't have adjustable floats, so even though the float is just out of spec I can't fix it. My older float needles sit right at 14mm and the new float needles sit a bit above 16mm and spec is 15.5mm.
I've tried adjusting the pilot screws all different ways. They're set to 3.5 turns out at the moment. Factory is something like 2 or 2.5 turns but when I got these carbs they were set to 3.5 turns. Plus I think the symptoms are bad enough that I don't think the pilot screws adjust enough to help. I've been turning them in and out and they don't really do anything noticeable.
Any advice or things to try would really help.
Thanks.
I've cleaned both the carbs in chem dip for 24 hours each, rinse and blowed out with compressed air, I ran a wire through each one after that to make sure everything is clear. I've triple checked and cleaned all my jets.
Here is a video of it running and stalling with out choke.
Parts I've replaced:
Carbs:
Float gasket
Float
Float needle
Accelerator pump diaphragm and oring
Both the air valve diaphragms and orings (forgot what these are called)
And all the other plastic bits.
New oil and spark plugs. New air filter in the stock air-box.
I've replaced the intake boots and o-rings.
I've rebuilt the engine and replaced all the gaskets and piston rings, with no oil leaks with good compression.
I've checked for vacuum leaks around the boots and petcock but haven't found anything.
I bypassed the fuel valve and filled the carbs manually to see if they're just not getting enough fuel, no dice.
I might be missing something but I feel like I've tried everything, and it's driving me crazy. These carbs don't have adjustable floats, so even though the float is just out of spec I can't fix it. My older float needles sit right at 14mm and the new float needles sit a bit above 16mm and spec is 15.5mm.
I've tried adjusting the pilot screws all different ways. They're set to 3.5 turns out at the moment. Factory is something like 2 or 2.5 turns but when I got these carbs they were set to 3.5 turns. Plus I think the symptoms are bad enough that I don't think the pilot screws adjust enough to help. I've been turning them in and out and they don't really do anything noticeable.
Any advice or things to try would really help.
Thanks.
