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juicebox

XR600R comment and question...

11 posts in this topic

So, I took my baffle out of my stock exhaust and rode around the neighborhood a little and I couldn't believe how it sounded with it out! I was so happy and it seemed that it had more power and it also seemed to run better.:ride: So that it the comment part of the post. :busted:

now for the question- I bought the XR6 from a guy in las vegas, (elevation:~2700 ft) and I live in cedar city Utah( elev. ~5800 ft). I plan on riding in the range of 4000-7000 ft in elevation, So my question being; is there any easy way to check what the jets are without too much trouble (i.e., pulling the whole carb off, etc) and what they should be at this elevation with no baffle/aftermarket exhaust?

I thought this question was better suited here rather than the jetting folder.

hopefully I was right. :banghead:

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Yes, I have the clymer manual, it says the main jet is 138, but I don't know if the previous owner jetted it different or not, and so I was just wondering if anyone knew an easy way to check what the jets were. Thanks for responding, I don't have the first clue about jetting so I figure I am going to be spending alot of time learning on the jetting folder but I just figured I would ask a couple of preliminary questions here.

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My bike would like to be jettted with a 155 main and a 65 pilot at 5800 feet. I normally run a 160 main and a 68 pilot and it doesn't act rich until I hit about 7500 feet. I've had it over 10,000 with this jetting and it still runs with no problems, it's just a little on the rich side.

I agree that it runs better with the baffle out, but it's too loud with it out. I have an aftermarket baffle that flows better than the stock unit, but is a lot quieter than no baffle. As long as you put the bolts back in, it is a legal spark arrestor with the baffle out.

Every bike is different. You need to find what woks best for you.

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To answer your question there is no way to tell what jetting exists without pulling the carb and inspecting them yourself; it is a painless 15 minute exercise.

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As a general rule, if your jetting was initially correct and then you pulled the baffle out of your stock exhaust , you bike is now running too lean. (More airflow, less fuel).

So it needs to be jetted a bit richer to allow for the increased airflow. One symptom of running to lean is exhaust popping a lot when you decelerate (a little popping is normal).

Another symptom is the engine running too hot - sudden change in color of header pipes.

I'm no mechanic, that's just layman's diagnosis. But if you're not sure, it's better to run a thumper a little too rich than too lean.

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+1...

You are definately going to be leaner now. I can loosen the fcr on my L and rotate it just enough to get the bowl off. You should be able to do so also.

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thanks for your replies, it does seem to run better now that I took the baffle off, but maybe I am just telling myself it does. but I will definitley get that bike of mine in my kitchen and tinker around and learn about the carb.

anyway, thanks so much guys!

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You don't need to pull the carb completely off to check/change the jets. You just need a stubby Phillips head screwdriver to get the bowl screws out. You can pull the slow jet out with a small flathead screwdriver and the main comes out with a metric wrench. I forget the exact size, but it's a little bigger than 1/4".

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thanks for your replies, it does seem to run better now that I took the baffle off, but maybe I am just telling myself it does. but I will definitley get that bike of mine in my kitchen and tinker around and learn about the carb.

anyway, thanks so much guys!

It almost certainly will have more power without the baffle because it's breathing better, but the bike will be a lot happier if you jet it to run a bit richer to compensate. Running lean is not good, watch out for overheating.

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So, I took my baffle out of my stock exhaust and rode around the neighborhood a little and I couldn't believe how it sounded with it out! I was so happy and it seemed that it had more power and it also seemed to run better.:ride: So that it the comment part of the post. :busted:

now for the question- I bought the XR6 from a guy in las vegas, (elevation:~2700 ft) and I live in cedar city Utah( elev. ~5800 ft). I plan on riding in the range of 4000-7000 ft in elevation, So my question being; is there any easy way to check what the jets are without too much trouble (i.e., pulling the whole carb off, etc) and what they should be at this elevation with no baffle/aftermarket exhaust?

I thought this question was better suited here rather than the jetting folder.

hopefully I was right. :banghead:

That isn't a big deal on an XR600R, I'd leave it alone. All you might have to do is decrease the size of the pilot jet and main one step but that will lean it out a little and make it harder to start. I'd leave it alone if it starts and runs well now.....usually you don;t need to rejet unless the bike is exhibiting problems, and XR600Rs don't with that kind of altitude change. I live at 7430ft and work at 5300 and have no problems at all going to and from that altitude every day in the summer. I do notice it runs better at the lower altitude, but that is normal...

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