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I have a 2000 Yamaha Bear Tracker 250 (YFM250) which starts up right away and runs ok for a bit, but with less than 1/2 the power of my other Yamaha Bear Tracker. Eventually after riding, it blackens the spark plug and runs awful and eventually doesn't want to start or run at all. CHOKE ISSUE: When you Pull the Choke Plunger 100% OUT, the idle goes DOWN....then pushed in at 1/2 position the idle goes UP and Choke Plunger pushed ALL THE WAY IN...Idle goes up even higher...? It acts like the plunger action is backward from our other 2004 Yamaha Bear Tracker (which idle goes up when pulling out, like normal). ---} Choke OUT = Normal Idle --} Choke IN 1/2 WAY = Higher Idle -} Choke IN FULLY = Super High Idle (For this reason, it has to run with the choke position all the way OUT or else it idles high and dies when you try to give it throttle.) While running it has very little power compared to our other Bear Tracker regardless of RPM. Less than half of the power, in fact. THINGS TRIED SO FAR: 1. Replaced Full Intake Boot Assembly From Carb-to-Head 2. Replaced Spark Plug 3. Replaced Ignition Coil and Spark Plug Wire 4. Replaced Air Filter Any and all help is greatly appreciated. Thank you!
- 9 replies
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- bear tracker
- ymf 350
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