what does a bad stator look like

Yeah, black goo and burnt coils are a dead giveaway the stator is toast. That insulation breakdown causes shorts. Replace it before you fry your CDI box.

Could just be varnish from age, but if you’re getting weak spark and it’s physically damaged, it’s done. I’d test resistance first with a multimeter to confirm.

I had the same on my YFZ450. Replaced it with an OEM stator and all good. Aftermarket ones can be hit or miss with output, so stick with stock if you can.

Don’t forget to check the pick-up coil too. Sometimes the stator looks fine but the pick-up gap or resistance is off. That can cause no-start like you’re describing.

Honestly, that goo is usually from overheating. Make sure your charging system isn’t overvolting or you’ll just cook the new one. Test your regulator/rectifier while you’re at it.

I’ve run a cheap eBay stator for two seasons now with no issues on my Raptor. Just make sure you get one with good ratings and potted coils. The price difference is huge.

Black goo plus burnt smell? Definitely replace it. Riding with a bad stator can kill your battery too from overcharging or undercharging. I’d do the whole system at once.

Before you drop cash, check for metal shavings in the oil or flywheel magnet damage. A bad crank bearing can chew up a stator. Not common but happens.

Partial disagree with the goo being normal. Some old stators can leak a bit of epoxy when hot, but if it’s blackened and brittle, that’s failure. I’d replace it to be safe.

I use an OEM-spec aftermarket stator from RM Stator on my Sportsman. Reliable and not too pricey. Just watch the gasket fitment—some cheap ones leak oil.

Weak spark is almost always the stator or coil. Since you see damage, start there. Make sure you gap the flywheel correctly or you’ll rub and destroy the new one in minutes.

Test the stator resistance and output voltage before buying. If it’s open or shorted, replace it. Also check the ground wire—corroded grounds can mimic stator failure.

I had a friend’s Rincon that had a bad stator from the factory. Looked melted after 10 hours. Warranty replaced it. If yours is old, just get a new one and move on.

If you do it yourself, use a torque wrench on the flywheel nut. Over-torque can warp the stator plate. Under-torque and it’ll come loose. Also use red Loctite on the bolts.

Aftermarket stators often need the timing base plate adjusted. They’re not always perfectly centered. If your spark is advanced or retarded, you’ll lose power. OEM is plug and play.

Before you buy, confirm your model year. Honda changed stators between 04-05 and 06+ for the TRX450R. Wrong one won’t fit the flywheel or harness. Double-check part numbers.

I’ve seen stators that looked perfect but failed the meter test. Yours sounds like a visual failure, so you’re probably right. But still test to avoid guessing.

Another thing: check the connector pins for melting. A bad stator can cause high resistance at the plug, which melts it. Replace the connector if it’s damaged.

For a 2005, might be worth upgrading to a higher output stator if you plan to add lights. Just make sure your rectifier can handle it. I did that on my project quad.

Honestly, if you have to ask, just replace it. You’ll waste more time diagnosing than the cost of a new one. Just get one from a reputable source and ride safe.