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I tend to use a test light where possible, as I have been fooled before, getting voltages with a meter which have subsequently proved to have no power to back up the volts.
#Can I get an AMEN#
You and me both. Still on the hunt for a good diagram. It's really a guessing game without one unless I strip this thing down to the frame and unwrap every bundle......really trying to avoid that if possible. I don't think the old fella (owner) wants to go that far it sounds like anyways.
Well, giving up on the old girl. I stripped the plastics and unwrapped every wire bundle related to spark/CDI/Stator/Coil/etc. Nothing to note. Still no idea which wire feeding the CDI could be rev limiter without finding a solid wiring diagram. I have to say this is the first time ever I could not source a good diagram for something I was working on in 25 years. Owner is coming to collect it in a few days. If anyone had any fresh ideas I'll give it a try. YouTube has been a bust even. Plenty on Yamaha's and bypassing rev limiters, e-brake switches, etc, but nothing specific to the Bear Tracker. I disconnected those brake switches anyways, just for the heck of it (why not?).
This will be my first official "I give up" ever. Kinda frustrating I admit.
Our local Yamaha dealer is quite open to sending me a diagram when I need one, he helps us out, we buy our Yam spares from him, and help him with Honda problems. As you are in the "trade" it could be worth trying your local Yam dealer for a diagram, the fault may even be one they get regularly.
I had the same issue. After reading this thread and speaking with two mechanics I was able to resolve this on my ‘99 Bear Tracker. It had set up for 10 years and I pulled it out determined to get it running. Replaced carburetor, air filter, oil change, everything, etc... It fired up first try and idled perfectly without any adjustments to the new carburetor. Then I rode it and could not get past half throttle in every gear. It would spit and sputter just as described in this thread.
I tried a few things and did my research to find the answer and to cut to the chase, it was running out of air. I pulled the cover off air box and road it without the seat to test and suddenly I had full power throughout every gear. I thought the snorkel coming from air box drawing air from under tank and seat must have a dirt dobber nest in it, but it was clear.
it seems the mouth of the snorkel is made slightly smaller by a thin Lip of rubber at the top, right under the gas tank. I trimmed off the lip to open up the mouth of the snorkel that minute amount and now the Bear Tracker is kicking but. I could not believe this minor adjustMent made that much difference, but it really worked... I hope this helps someone else out there... Good Luck!
I had the same issue. After reading this thread and speaking with two mechanics I was able to resolve this on my ‘99 Bear Tracker. It had set up for 10 years and I pulled it out determined to get it running. Replaced carburetor, air filter, oil change, everything, etc... It fired up first try and idled perfectly without any adjustments to the new carburetor. Then I rode it and could not get past half throttle in every gear. It would spit and sputter just as described in this thread.
I tried a few things and did my research to find the answer and to cut to the chase, it was running out of air. I pulled the cover off air box and road it without the seat to test and suddenly I had full power throughout every gear. I thought the snorkel coming from air box drawing air from under tank and seat must have a dirt dobber nest in it, but it was clear.
it seems the mouth of the snorkel is made slightly smaller by a thin Lip of rubber at the top, right under the gas tank. I trimmed off the lip to open up the mouth of the snorkel that minute amount and now the Bear Tracker is kicking but. I could not believe this minor adjustMent made that much difference, but it really worked... I hope this helps someone else out there... Good Luck!
^^^ can confirm. Thank you soo much, i made an account here to revive a dead thread again just to confirm that also fixed my issue. Got given an old beartracker off the farm been sitting in a barn for near a decade. New tank petcock, carburetor n battery n it was running pretty good. In neutral could rev the **** out of it but in gear youd get a out 1/2 throttle n make some sputters n die. Fire right back up n repeat. My mechanic buddy said it was running rich, so i started googling and ended up on this forum. Carb still unadjusted but just cutting off that 1/8 inch of lip solved the issue, runs like a scalded dog now.
I had the same issue. After reading this thread and speaking with two mechanics I was able to resolve this on my ‘99 Bear Tracker. It had set up for 10 years and I pulled it out determined to get it running. Replaced carburetor, air filter, oil change, everything, etc... It fired up first try and idled perfectly without any adjustments to the new carburetor. Then I rode it and could not get past half throttle in every gear. It would spit and sputter just as described in this thread.
I tried a few things and did my research to find the answer and to cut to the chase, it was running out of air. I pulled the cover off air box and road it without the seat to test and suddenly I had full power throughout every gear. I thought the snorkel coming from air box drawing air from under tank and seat must have a dirt dobber nest in it, but it was clear.
it seems the mouth of the snorkel is made slightly smaller by a thin Lip of rubber at the top, right under the gas tank. I trimmed off the lip to open up the mouth of the snorkel that minute amount and now the Bear Tracker is kicking but. I could not believe this minor adjustMent made that much difference, but it really worked... I hope this helps someone else out there... Good Luck!
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I removed the rubber snorkel and made my own snorkel but the problem is still there, any ideas anything helps
Had the same issue with an '01 beartracker and it was driving me nuts. I did use an aftermarket carburetor and it turns out they are jetted wrong. 105 main and stock is 95. But cutting off the top of the snorkel worked like a charm. Thanks for the info. (I checked the jet after I got it to run correctly ).
I don't know the history of the carburetor on my recently purchased 2003 Bear Tracker 250, but the ATV wouldn't accelerate when giving it throttle. If I feathered the throttle it would eventually increase in speed but if I gave it a quick throttle demand it would almost stall out. I started out changing the CDI box (no change), spark plug, then started rejetting, changing float level, checking valve lash, a second CDI box thinking I got a bad one, etc., etc. Long story short, when demanding power the acceleration circuit was not operating properly, causing an over lean condition. There is a drilled passage from the exit side of the carb just downstream of the butterfly that leads to the top of the acceleration diaphram camber. The passage has a brass orifice on the diaphram side which was 0.035" with a passage below it of 0.018" causing too much restriction, and a very slow response of the acceleration circuit. I drilled out the orifice and passage to 0.038" and it corrected the problem. That circuit allows vacume to quickly open the enrichment valve, and pull on the top side of the main diaphragm during high throttle demand, raising the tapered needle for the correct fuel air mixture. I also opened up the passage in the upper diaphram cover for faster diaphragm response. The passage is almost 1/2" long so go very slowly to avoid breaking your orifice drill bit.
Nov 7, 2017 | 11:49 AM
