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Old 12-07-2012, 12:02 PM   #766
maverick1
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I've read that many XT250 owners have done engine mods where they upgrade the main jet, and shim the jet needle, and other adjustments.
My question is are these mods something a motorcycle shop could do, or is it something you have to do yourself.
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Old 12-07-2012, 12:09 PM   #767
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I did those mods myself, cost me about 5 bucks, lol

a shop can do it, but they will charge you for it.
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Old 12-07-2012, 12:29 PM   #768
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Is it worth trading in the 2012 for 2013 with FI? seems like a good compromise, the consistency of FI but not water cooled hence a little lighter.
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Old 12-07-2012, 12:37 PM   #769
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I wouldnt, my 09 ran fine, never had an issue and would start up immediately, if jetted properly and you do the air/fuel screw 3 turns out mod, they run great imo.
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Old 12-07-2012, 12:42 PM   #770
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I did those mods myself, cost me about 5 bucks, lol

a shop can do it, but they will charge you for it.
Wow, I called up a shop just to see what they would charge and was quoted $222.00 for a carb service.
Are there any links online "how to Jet" your carb?
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Old 12-07-2012, 12:58 PM   #771
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Wow, I called up a shop just to see what they would charge and was quoted $222.00 for a carb service.
Are there any links online "how to Jet" your carb?
Check this out.

http://www.xt225.com/forums/ubbthrea...9291#Post89291

you order the main jet #140 from boats.net, thats like 5 bucks shipped, you remove the air box cover from the air filter lid, you add a small shim to the jet needle, and if you can get the FMF pipe (240 bucks), and the bike will be much stronger, very easy to remove the carb, you just need to disconnect stuff, wiggle it out, and then connect everything back, if you were closer id help you out, takes about an hour to pull it out, rejet, shim the needle and put it back in the bike.
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Old 12-07-2012, 03:29 PM   #772
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Great pictures Roadrunner! bike looks great, you will love the more dirt worthy tires.
Thanks! I'm looking forward to giving them more dirt runs.
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Old 12-07-2012, 03:31 PM   #773
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Is it worth trading in the 2012 for 2013 with FI? seems like a good compromise, the consistency of FI but not water cooled hence a little lighter.
Even I can pick up my '08 XT250 - barely.
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Old 12-07-2012, 04:25 PM   #774
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Is it worth trading in the 2012 for 2013 with FI? seems like a good compromise, the consistency of FI but not water cooled hence a little lighter.
I wouldn't bother switching. The key to a carb is don't let it sit around much. The pilot jet can plug up.
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Old 12-07-2012, 05:45 PM   #775
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Originally Posted by 150ron View Post
Check this out.

http://www.xt225.com/forums/ubbthrea...9291#Post89291

you order the main jet #140 from boats.net, thats like 5 bucks shipped, you remove the air box cover from the air filter lid, you add a small shim to the jet needle, and if you can get the FMF pipe (240 bucks), and the bike will be much stronger, very easy to remove the carb, you just need to disconnect stuff, wiggle it out, and then connect everything back, if you were closer id help you out, takes about an hour to pull it out, rejet, shim the needle and put it back in the bike.
Thanks for that.
I will probably do it myself.
Anyone in southern California have experience doing this mod?
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Old 12-07-2012, 06:24 PM   #776
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im about an hour and 45 minutes away from you, my parents used to live in Murrieta, the 140 main jet, stock pilot jet, 3 turns out on the fuel/air screw, air filter cover off, and a tiny shim under the jet needle, along with a FMF exhaust, and the bike ran so much better and stronger then stock.


did you do this mod allready?

this is a must, as they are hard to start when stock.

http://www.4strokes.com/tech/yamaha/...ix_screw_plug/
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Old 12-07-2012, 06:58 PM   #777
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I wouldn't bother switching. The key to a carb is don't let it sit around much. The pilot jet can plug up.
We always run our carb dry - making cold starts a lot easier.
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Old 12-08-2012, 04:45 AM   #778
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We always run our carb dry - making cold starts a lot easier.
I did the same when I could remember. Even just running it down part of the way helped significantly. For anyone not sure what this means, turn you fuel valve off a block or two from home and let the bike die rather than killing it yourself. I think that alexd's theory that fresh fuel vapor helps the bike start may be correct.
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Old 12-08-2012, 07:19 AM   #779
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I tried it both ways, with leaving the carb full when i put the bike away, and also running it dry and letting it die from fuel starvation before putting it away, but mine would always start up pretty good either way, i also always kept mine on a battery tender when not in use.

But running the carb dry seems to work for a lot of people, so its a good method, i would always add a little bit of seafoam to the gas, to keep everything nice and clean and fresh.
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Old 12-08-2012, 03:04 PM   #780
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I tried it both ways, with leaving the carb full when i put the bike away, and also running it dry and letting it die from fuel starvation before putting it away, but mine would always start up pretty good either way, i also always kept mine on a battery tender when not in use.

But running the carb dry seems to work for a lot of people, so its a good method, i would always add a little bit of seafoam to the gas, to keep everything nice and clean and fresh.
Yeah...it is interesting. My husband's XT starts more easily with cold starts. Mine - I had to learn the hard way to run it dry or I'd start running down my battery trying to get it to kick over in the cold.

So, now we both let them run dry as a matter of habit.
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