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 Beartracker Jetting Question

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TikiGod77
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PostSubject: Beartracker Jetting Question   Mon Jul 25, 2011 3:49 pm

I have an '01 Yamaha Beartracker 250 that I just traded for recently. It ran great, was just trying to give it a little more attitude for a little bike, so I added an FMF slip on exhaust. Sounds good, but I have to ride it with 1/2 choke. I know I need to rejet the carb, just not sure how much or where the change should be made at. The carb is sitting on my bench right now and here is the current setup:
- 95 main jet
- 42.5 slow jet
- Original needle with the clip in the 3rd notch.

Don't want to waste my money on a DynoJet kit that I will not use most of. Anyone know of a good setup here?
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Bootlegger
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PostSubject: Re: Beartracker Jetting Question   Mon Jul 25, 2011 5:35 pm

Leave the needle where its at. Also leave the pilot jet the same for now. Just go up two sizes on the main jet. If its too much drop down one size that should be pretty close.

The best part about the Dynojet kit is it comes with everything you need. That way you have everything you need on hand. If not you will need to buy atleast 3 size's up on the OEM jets. Then hopefully the stock needle will work. If not, you'll have to get the kit.

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TikiGod77
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PostSubject: Re: Beartracker Jetting Question   Tue Jul 26, 2011 9:54 am

so it would be best to order a 97.5 and a 100 main jet and give them each a try?

I bought a DynoJet kit before for a Suzuki I had and it is nice to have that many different options. But when it comes to $60 for a kit or $2.79 per jet, I can order several jets till I get it right. Very Happy
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PostSubject: Re: Beartracker Jetting Question   Tue Jul 26, 2011 4:15 pm

TikiGod77 wrote:
so it would be best to order a 97.5 and a 100 main jet and give them each a try?

I bought a DynoJet kit before for a Suzuki I had and it is nice to have that many different options. But when it comes to $60 for a kit or $2.79 per jet, I can order several jets till I get it right. Very Happy

Yes, that is what I would do. The kit should come with a new needle and springs. Or atleast on most atv's they do, but as you know everyone is different. I would buy the 3 sizes up...just in case. I would think the next 1-2 sizes up would work...but not 100% sure. You may also have to drop the needle clip down one notch from the top. That will raise the needle up giving it more fuel. I wouldn't do that unless your 1/4-3/4 throttle is too lean. If you need any more help with the jetting just let me know.

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TikiGod77
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PostSubject: Re: Beartracker Jetting Question   Tue Jul 26, 2011 9:55 pm

Thanks for the help. I have placed my order and as soon as they come in and I can put them in and get it tuned, I will update. Might help someone else out that likes to tinker...
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PostSubject: Re: Beartracker Jetting Question   Tue Jul 26, 2011 10:08 pm

If you have any issues let me know. I'm pretty good with Carbs & EFI....but thats about it. Motor work I'm at a loss....lol.

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TikiGod77
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PostSubject: Re: Beartracker Jetting Question   Sat Jul 30, 2011 2:44 pm

Update: got the jets in the mail Friday afternoon and started work on it. Best tip I got, get a new spark plug and install it before you even start. This will save you a great headache.

This is the setup I have on it right now that seems to work the best for my current mods:
- 100 Main Jet (+2 sizes)
- 45 Slow Jet (+1 size)
- Needle clip is now in the middle notch
- Mixture screw is set at exactly 2 turns out from the bottom

This quad ran great when I first got it. Put the new air filter on and the FMF Powercore slip-on and it ran a lot better. Got the jetting corrected and I can't believe how much torque this little bike has. Thought about selling it, but I'm not sure about that now!

Thanks Bootlegger for the help, it really steered me in the right direction!!!
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PostSubject: Re: Beartracker Jetting Question   Sat Jul 30, 2011 4:59 pm

No problem...Its hard to explain how to do it on here IMO.

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