Big red runs terrible

[wetdirt]

My dads big red will idle fine and runs good up to about half throttle. Anything higher than that it misses.

He cleaned the air filter, drained the gas, changed spark plug, and adjusted the valves. No change. I'm not sure if it is starving for fuel or possibly an ignition issue. Anyone ever heard of this happening. I think it has about 600 hours on it. 2010 model. Thanks.

 

[Admin]

 

[ohanacreek]

sounds like a weak spark, maybe a bad plug wire or coil?

 

[Bayouownbeer]

Sounds like it not getting enough fuel to operate at above mid throttle. First thing I would check for is there a fuel filter?

 

[wetdirt]

The fuel filter is a sock in the tank. it was clean. I talked to a local Honda shop today. They said there is an updated stator for the older big reds. He said the crank shaft sensor is built in to the stator and their has been some problems with the older stator assemblies. So I guess we will check that out next.

 

[lambchop]

Did you find out the problem was it the stator

 

[Hondarider]

Did you find out the problem was it the stator

Hello, Did you find out what was causing this laying down at half throttle?

 

[DG Rider]

Hello, Did you find out what was causing this laying down at half throttle?

You might consider starting a new thread with your symptoms. These guys are likely long gone, and you get a lot of these types of threads where no solution was ever given.

If you've checked out all the stuff listed in the 2 threads you posted on, keep in mind that this engine is known to eat camshafts on occasion. The symptoms of the OP here sound suspiciously like that was the problem.

 

[Hondarider]

You might consider starting a new thread with your symptoms. These guys are likely long gone, and you get a lot of these types of threads where no solution was ever given.

If you've checked out all the stuff listed in the 2 threads you posted on, keep in mind that this engine is known to eat camshafts on occasion. The symptoms of the OP here sound suspiciously like that was the problem.

DG Rider, so what is the fix for the engine eating camshafts? Sounds like mine is gone with less than 500 hours, yes 500. What was causing it, and will a new camshaft only last 500? Our machine gets driven daily but less than a mile and easy conditions.

 

[Hondarider]

DG Rider - For our rig it was the camshaft. 434 hours total time on engine. New cam, holder etc. and it runs MUCH better. When I told the service writer the machine woudn't shift into second gear until backing off on throttle slightly, he immediately indicated it was probable the cam. And it was. Camshafts seem to be an issue with these engines.

 

[DG Rider]

DG Rider, so what is the fix for the engine eating camshafts? Sounds like mine is gone with less than 500 hours, yes 500. What was causing it, and will a new camshaft only last 500? Our machine gets driven daily but less than a mile and easy conditions.

DG Rider - For our rig it was the camshaft. 434 hours total time on engine. New cam, holder etc. and it runs MUCH better. When I told the service writer the machine woudn't shift into second gear until backing off on throttle slightly, he immediately indicated it was probable the cam. And it was. Camshafts seem to be an issue with these engines.

Sorry @Hondarider, I didn't see that question last year. I never had an issue with mine.
The answer as to why? There seems to be no definitive answer, and that's the part that's frustrating.