This video is all about changing the needle valve (pintle valve, like Andy said) of the Jawa 350/639 carburettor. Why did it had to be changed? Because it did not sealed at all, letting the gasoline overflow the floating chamber quickly, causing the engine to be unstartable. So it's important to have it working and to seal properly.
Therefore - after change - one must check, if it seals properly, otherwise there is no point to assemble the carb back into one piece. If it doesn't, we have to make the seat seal and then check the fuel height in the chamber after the valve closes and set the carb up new. But that is a topic for another video.
TOOLS:
- 13 mm wrench
- cross screw driver big and small
- pliers
- drain box
- gloves
MATERIAL:
- new fuel needle valve
- new floating chamber sealing, if you like
- brake or carb cleaner
- paper towels or a rag
JAWA VIDEOS BEFORE:
Gasoline Tank Valve Upgrade
• Jawa 350/639 - Gasolin...
Speedometer gauge overhaul
• Jawa 350/639 - Speedom...
RPM gauge tear down
• Jawa 350/639 - RPM Gau...
Mounting the engine together
• Jawa 350/639 final eng...
Mounting deadmass compensating panels
• Jawa 350/639 engine mo...
Removing the crank, comparison btw. serial and sport crank
• Jawa 350/639 engine di...
Dismounting pistons and cut the engine in halves with a selfmade tool
• Jawa 350/639 engine di...
Dismounting primary gear and clutch
• Jawa 350/639 engine di...
Dismounting some basic parts, cleaning the engine
• Jawa 350/639 engine di...
Engine out of frame
• Jawa 350/639 engine re...
#motorcyclevideos
#motorcyclerepairing
#motorcyclerestoration
#motorcyclerepair
#motorcyclemaintenance
#motorcycleromance
27 авг 2024
