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Discussion Starter · #1 · (Edited)
Problem: Vehicle was running and died. Would not restart. Replaced all below components, one at a time, still no fix. It did start finally, and would only idle. Then, would die, and would not start again. Cleaned out fuel tank, fuel petcock. Lapped valves. Compression reading is 200 psi. Adjusted valves about 10 times. Re-set or checked timing 4 times.



Components repaired/replaced: new cam, new lifters, new cam followers, new cam chain, new cdi, new ig coil, new stator, new igniter, new rectifier, new diodes, new wire harness, new lft switch module, new battery, new carburetor.


Any recommendation for what we should do next? Should we replace valves & guides? Should we replace cam chain tightner. Seems to keep chain tight. Oil pump chain has a little slack.

Still wonder why we are at @ 200 psi. Have checked valve lash many, many times. Specs say 185 psi.

ANY SUGGESTIONS WOULD BE APPRECIATED. THANK YOU.

Aso, will start, but will not idle up, or throttle up. Won't idle either.
 

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Problem: Vehicle was running and died. Would not restart. Replaced all below components, one at a time, still no fix. It did start finally, and would only idle. Then, would die, and would not start again. Cleaned out fuel tank, fuel petcock. Lapped valves. Compression reading is 200 psi. Adjusted valves about 10 times. Re-set or checked timing 4 times.



Components repaired/replaced: new cam, new lifters, new cam followers, new cam chain, new cdi, new ig coil, new stator, new igniter, new rectifier, new diodes, new wire harness, new lft switch module, new battery, new carburetor.


Any recommendation for what we should do next? Should we replace valves & guides? Should we replace cam chain tightner. Seems to keep chain tight. Oil pump chain has a little slack.

Still wonder why we are at @ 200 psi. Have checked valve lash many, many times. Specs say 185 psi.

ANY SUGGESTIONS WOULD BE APPRECIATED. THANK YOU.

Aso, will start, but will not idle up, or throttle up. Won't idle either.
Here is my .02 for ideas to consider:

1) I would clean completely all pilot jet and all areas of the carb
2) take the line off the tank, then turn on the petcock and if the fuel flows freely out of the tank, may still be plugged
3) once you verified the tank, hook the fuel line up and try it (remove from carb) and see flow
4) change the spark plug
 

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Discussion Starter · #6 · (Edited)
New OEM carb

They are all OEM parts.\

Just tore down top end again, all new gaskets, etc. Checked timing 5 times before putting back together. Will fire and idle a couple secs then dies. Will not throttle up. WOW! This is very frustrating. Seems to have weak spark. Have replaced all ignition components (see post above) with OEM parts. Have spent over $1200. F'n piece of crap!
 

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I'd go through the carb next, armed with a copy of the service manual, assuming the carb boot isn't cracked open or sucking air... and all cables are adjusted right. Hang in there... but stop throwing money at it.
 

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Please help!
My second .02 cents....

1. Change the spark plug
2. Clean the fuel tank, fuel lines and then go through the carb. A new carb swallowing trash will not work, so painfully go through it carefully.
3. Check air filter and air intake to ensure it is not blocked, mouse nest, etc.
 

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Have you put a shot of starting fluid ether into the carb inlet? I don't recommend using this stuff as a crutch to start the engine but it is great for diagnostic purposes.

Rick

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