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XRLarry

06 WR450 Jet for Ouray

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I have an 06 WR450F. Removed air restrictor, cut grey wire, pulled some junk out of the pipe. Runs great down here at sea level. I am taking it to Ouray CO (altitude 10,000 ft?) later this month. I asked the dealer what I needed to do to re-jet it for altitude. They said to bring some different size main jets - so I got three: 158, 160 and a 162. So I was playing around with the carb yesterday and pulled out the main jet. It says 165S on it. So here are my questions: 1) Do I need to change anything else (besides the main jet) when I get up to altitude? 2) I got the main jet out with a 6mm socket with the carb on the bike - do I need to pull the carb off to change the pilot jet? Any other suggestions for a carb neophyte? Thanks.

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I rode the Ouray area some years ago, you can get waay up in the clouds!

There's a Yamaha dealer up the road in Montrose, stop by and ask them. They helped me out with my jetting.

Pack cold weather gear along on your ride, it can get nasty in a hurry up there. Started snowing & hailing on us, and it was mid-July. :ride:

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XR Larry,

You'll probably want a 160 main jet to start. If using JD's jetting kit, try JD Red #4. You'll want to tweak the fuel screw, too. Take it that you're riding in the Colorado 500. Have fun! Good advice about the weather. It's not unusual to get some afternoon thunderstorms. And the temperature near the passes will be chilly.

Cairn

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Thanks. No need to change the pilot jet, eh? I am planning to meet some buddies up there at the end of July - not for the Colorado 500 though. Just riding. When is the 500?

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Hello Larry..........

I jetted my fathers 06 for a thousand miler in Colorado last year. I put in a 160 main and a 45 pilot, I used the stock needle with its one position... He said the bike ran bitchen, no hiccups to speak of..... :ride:

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Woops! The Colorado 500 is apparently held the end of August, not July; don't know the exact dates. I've been told that the group will be in Ouray August 22, 23 and the morning of the 24th. The circuit starts and ends near Basalt, CO.

Have fun riding. There are lots of passes to ride and a lot of interesting towns to visit...Ouray, Telluride, Lake City, etc.

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Indys chart:

Elevation 0 to 4,000. feet

30 to 45 degrees: 172 main, JD Blue #5, 48 Pilot, 2.0 turns, 75 starter jet, #0 leak jet

45 to 60 degrees: 170 main, JD Blue #4, 48 Pilot, 1.75 turns, 72 starter jet, #0 leak jet

60 to 75 degrees: 168 main, JD Blue #3 or JD Red #5, 48 Pilot, 1.5 turns, 70 starter jet, #40 leak jet

75 to 90 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #50 leak jet

90 degrees plus: 160 main, JD Red #4, 45 Pilot, 2.0 turns, 65 starter jet, #60 leak jet

Elevation 4,000 to 8,000 feet:

30 to 45 degrees: 170 main, JD Blue #4, 48 Pilot, 1.75 turns, 72 starter jet, #0 leak jet

45 to 60 degrees: 168 main, JD Blue #3, 48 Pilot, 1.5 turns, 70 starter jet, #40 leak jet

60 to 75 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #40 leak jet

75 to 90 degrees: 165 main, JD Red #5, 45 Pilot, 2.0 turns, 65 starter jet, #50 leak jet

90 degrees plus: 160 main, JD Red #4, 45 Pilot, 1.75 turns, 65 starter jet, #60 leak jet

Elevation 8,000 to 11,000 feet: ( Note you will loose a lot of power due to altitude but your bike will idle and not foul plugs!)

45 to 60 degrees: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 70 starter jet, #40 leak jet

60 to 75 degrees: 160 main, JD Red #4 , 45 Pilot, 1.75 turns, 68 starter jet, #50 leak jet

75 to 90 degrees: 158 main, JD Red #3, 45 Pilot, 1.5 turns, 65 starter jet, #60 leak jet

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I was just in Taylor Park a few weeks ago. I have an 06 with ais removed , fuel screw about 1 1/4 out,45 pilot, 165main, air temp was a high of 70. I had the stock needle in, also snorkle and muffler reducer removed. Last week I went to moab and ran same set up except the air temp was up to 102 , I ran the fuel screw at 13/4. The bike has 500 miles, and It is the best 4 stroke Iv'e ridden. The carb works really well and there is no hesitation, Remember, you generally ride in the 6-9,000ft range and just pop over that for short periods. Although we rode timberline and its pretty high up for awile. I would just bring a few mains and have fun. Also the altitude will probably make you suck wind more than the bike.

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How was the timberline Trail? we are spending a couple of days camping at Taylor and riding around there before we head over to Ouray. One of my buddies is riding an old XR650L. Is the Timberline navigable on such a beast?

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I agree that most of the mountain riding in Colorado is 6,000 to 9,000 feet, but the Ouray (7,700')/Telluride (8,700') area is higher than average and ranges mostly from 8,000 to 12,000 feet....FWIW.

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One of my buddies is riding an old XR650L. Is the Timberline navigable on such a beast?

If your buddy is not a strong, good rider, riding Timberline with an XR650L could possibly be one very bad day. :ride:

BTW, Taylor Park is 9000' and it goes up from there.

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