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My 2001 wrf250 has just had a top end rebuild had no problems just cant start anymore, when i go to start it sometimes it sounds like a small popping sound
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The good news is that there are rebuild kits available specifically for carbureted engines.
To ensure compatibility, I recommend checking if there's a rebuild tag on your carburetor. This thin metal tag is often held by one of the small screws that connect the top and bottom halves of the carburetor. It contains essential information about the carburetor model.
If the rebuild tag is missing, you can try looking up the kit using the number stamped into the side of the carb body. Alternatively, provide the make and model details to your parts supplier-they should be able to assist you.
Carburetor Rebuild Kits:
While most listings might focus on EFI, there are still options available for carbureted engines.
Consider searching for a custom carburetor rebuild kit specifically designed for your 2010 Qlink Front Runner 500. These kits include components needed for a top-end rebuild.
One such option is the QLink Front Runner FR 500 UTV 4x4 Custom Carburetor Carb Stage 1-3 Jet Kit available on Amazon. It offers increased performance, faster throttle response, and stops lean exhaust popping.
Remember to double-check the compatibility and specifications before making a purchase.
With the decompressor active, nominal is 85 - 90 psi. At 62 psi, you have a top end problem. Try dumping a bit of oil in the cylinder and re-test. If the pressure rises, you have a ring seal problem. That sounds like an top end rebuild.
Sounds like the piston seized. Pull the spark plug and hand crank the engine if the piston moves up and down with little effort your ok but if you have a lot of resistance top end rebuild needed.
sounds like you might need to rebuild the top end and check the rod bearings remember when doing a top end always change piston and rings and use new base and head gasket
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