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I came across an odd temporary fix for a 1985 yamaha 80 ATV. It has no spark, yet if I warm the CDI unit up a bit with a heat gun or hair dryer then it fires right up and runs fine until shut off then it returns to no spark until warmed up again. Partzilla shows $217 for a new CDI
It's sort of nuts how I found out the fix to warm it up. My old shop TV requires my heat gun warm up around the transformer area every day before it will turn on too.
By amelia slabbert
Hi I have a YAMAHA RAPTOR 660R 2003
I have taken of my Air filter and sprayed in my air inlet some carberator cleaner while starting it. That causes some problems. It struggles to start now. Please look at my attachedment video.
What can I do now.?
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By Austin Phillips
I have a yamaha beartracker 250 (yfm250) its not running right. starts fine mostly ...idles but if i give it gas it boggs out and dies before it even can carry its self ... I cleaned the carb ... put everything back and same issue. so i bought a new carb and intake boot.... replaced both things and still the issue persists. So i have a new carb .... does the Air fuel mixture need to be set on the new carb? If so how do i do that? i ave looked everywhere for details on my bike and carb but cannot find anywhere that reads that the skrew needs to be adjusted out to 7 full turns or somthing to that effect..
The bike ran fine until bad gas was put into it... i did remove and empty the gas tank. removed petcock cleaned and rebuilt that.....
i also noticed that the new carb ....the bottom skrew for draining the bowl was closed all the way when i got it.. carb wouldnt get gas until i loosened it... now the bowl will drain ... i thought that that float stops this from happeneing....am i wrong?
View File 2001 Yamaha Bear Tracker Full Service Manual
Figured I would share what I had. This really helped me out. Tinkering with my wife's atv now, so Looking for a 96 Polaris Xpress 300 service manual, preferably a free download.
Submitter Steve1981 Submitted 09/29/2018 Category Yamaha ATV
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.
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