XRL's can't push 70mph for 2 hrs?

Quit being a Lady and pick up a Real man's bike that can do 100mph for hours on end :)

Quit being a Lady and pick up a Real man's bike that can do 100mph for hours on end :)

ha, can't believe it still L or R but after 2 hours its not my L that quits its my butt!!

Well, as it seems that every point of view has been expressed here, I thought I'd enter in my own! It is common knowledge that the stock barrel-type carburetors on the late model XR's - 600's/650's, would typically lean out after sustained high speed riding, causing overheating(that's why the manual says to use a lower heat-range spark plug [DR9EAS-P or something as opposed to DR8EAS-P] for that application). The guy who said his '06 650 never overheats at high speed, that's because it's wtaer-cooled, even a small amount of airflow to the radiators will produce greater cooling than any air-cooled engine. The older XR's were air-cooled, meaning the engine is completely reliant on enough airflow to adequately cool the engine oil, which with enough heat will bring the viscosity to a level where it will no longer lubricate enough to allow the piston to travel up and down within the cylinder. That's when overheating happens. This tread is the first time I've ever heard of a CDI box malfunctioning, but I'm sure it's possible. Go with a flatside pumper/non-pumper carb and you won't have the leaning out/overheating problems. Good luck.

Well, as it seems that every point of view has been expressed here, I thought I'd enter in my own! It is common knowledge that the stock barrel-type carburetors on the late model XR's - 600's/650's, would typically lean out after sustained high speed riding, causing overheating(that's why the manual says to use a lower heat-range spark plug [DR9EAS-P or something as opposed to DR8EAS-P] for that application). The guy who said his '06 650 never overheats at high speed, that's because it's wtaer-cooled, even a small amount of airflow to the radiators will produce greater cooling than any air-cooled engine. The older XR's were air-cooled, meaning the engine is completely reliant on enough airflow to adequately cool the engine oil, which with enough heat will bring the viscosity to a level where it will no longer lubricate enough to allow the piston to travel up and down within the cylinder. That's when overheating happens. This tread is the first time I've ever heard of a CDI box malfunctioning, but I'm sure it's possible. Go with a flatside pumper/non-pumper carb and you won't have the leaning out/overheating problems. Good luck.

VERY well said!!!!!!!:):ride:

I read on ADV rider the the CDI's go out on these bike. Mine stalls for no apparent reason and it tried to replace the CDI to fix the problem. I replaced the CDI today and went for a little ride and she shalled 1/2 mile into the ride. I now have a spare CDI.

My 1999 XR650L would hesitate or cut out for a few seconds. Sometimes I would happen every 50+ miles, sometimes more often. It would restart all the time, but it got progressively worse. I looked at everything (else), but it was not fixed until I got a new CDI. The problem never came back once I put in the new CDI.

Rejet the XR650L and use a good synthetic oil. This will reduce oil temps significantly. I rode several 400+ mile days, have ridden 130 miles of interstate at a time, and rode from Colorado to Montana and back, running 70 mph all the way, with lower-than-stock 14/45 gearing.

How does the stock carb "lean out" from extended high speed riding?

How does the stock carb "lean out" from extended high speed riding?

I wonder this myself....its either lean or its not.

A carb will not just GET LEANER without a reason.

Like say you dropped down from riding at 8,000 feet over a pass, to say sea level.

Or if the air temp drops a lot it can also run leaner.

I have searched every website i can on carbs to see if they just become leaner after say an hour or more of driving at hwy speeds, and so far all of them say no.

So please tell me what it is about the 650L carb that it does this.

Thanks

How does the stock carb "lean out" from extended high speed riding?

It doesn't get leaner with high speed riding. The stock XR650L is lean from the factory, and it causes the bike to run hotter. If you rejet it, it will run better and also run slightly cooler. Thumpertalk and 4strokes.com have all the answers. :)

That's what I thought too,but Jclaus98 said they "lean out during extended high speed riding" and that was backed up by the next post. Thought maybe I was missing something.

I can't believe all the BS on this thread.

70,80,90,100 for 2 hours straight.... I sure you have!

MGS

Sure makes you wonder how anyone ever got anywhere on an air cooled bike.

It is not the carburetor that leans out from long extended high rpm running but, the engine developes hot spots in the upper cylinder. You get per-dedonation and fuel getting hot before detonation and does not all burn leaving the a leaner mixture. The XR600R had this problem quite often. Running a ritcher main jet was is common on long race bike in hot weather. VW's have this same problem once it get's hot outside. Not a big deal but, one of the reasons water cooled makes more hp. Not a big deal if you have good air flow and jetted a little rich.

It doesn't get leaner with high speed riding. The stock XR650L is lean from the factory, and it causes the bike to run hotter. If you rejet it, it will run better and also run slightly cooler. Thumpertalk and 4strokes.com have all the answers. :)

I agree they are jeted pretty lean right off the show room floor...but he clearly stated it got leaner the further one rides it.

I agree with you 100 % murgatroid.

But if they can actually get leaner on long trips as a few others posted, I would sure like to know how.

Thanks again:ride:

I can't believe all the BS on this thread.

70,80,90,100 for 2 hours straight.... I sure you have!

MGS

Howdy MGS,

Whats hard to believe? Not everyone has a tiny tank like you.:)

Last year I did 7000 miles on the turnpike on my XRL as it was my main transportation from west palm to homestead for the weekends. Almost all of it was over 80, and the bike did great. I still make the trips this year, but on the Buell Ulysses.

I'm sure the bike may of had a problem performing in stock trim, but mine and yours are both pretty far from stock. The pumper and the big clarke tank makes the difference.

Howdy MGS,

Whats hard to believe? Not everyone has a tiny tank like you.:)

Last year I did 7000 miles on the turnpike on my XRL as it was my main transportation from west palm to homestead for the weekends. Almost all of it was over 80, and the bike did great. I still make the trips this year, but on the Buell Ulysses.

I'm sure the bike may of had a problem performing in stock trim, but mine and yours are both pretty far from stock. The pumper and the big clarke tank makes the difference.

Limited range is not my problem, limited balls is more like it. I don't want to mess up my clean driving record.

Around here, 15+ on the speed limit for more than a few miles will get you a ticket for sure.

Hell you can drive across my state in 2 hours at 75mph!

MGS

I drive my 2006 XRL to my cabin in WV and drive on I81 for about 2 1/2 hours at 75 - 85 the entire time (except for refueling:mad: ).

Limited range is not my problem, limited balls is more like it. I don't want to mess up my clean driving record.

Around here, 15+ on the speed limit for more than a few miles will get you a ticket for sure.

Hell you can drive across my state in 2 hours at 75mph!

MGS

I live in Colorado. The interstate speed limit is 75 mph, many secondary roads are open and 65 mph, so it is easy to ride for several hours at that speed. I rode from Colorado to Montana using all secondary roads in Wyoming. They were deserted, 65 mph limit, and I averaged about 70 on my XR650L. The Clarke tank gave me enough range. I know they were deserted, because my riding partner's bike broke down in the middle of nowhere, and we didn't see a policeman go by in the 3+ hrs. we were on the side of the road. Even calls to 911 didn't get a response.

Wyoming has 600,000 people TOTAL in the entire state. It's empty.

Wowza. I think we have 600,000 people in my neighborhood here in Joisey:p And it seems like they all drive two cars at a time all the time:crazy:

Off topic for a second here. Regarding no cops in three hours, I drive in I195 for about 8 miles to church every Sunday morning and without fail I will pass 3-4 State Troopers all of whom will either be sitting in speed traps or will have someone pulled over. Good thing I ride a full sized van with a six cylinder - I CAN'T speed!!!!

I drive in I195 for about 8 miles to church every Sunday morning and without fail I will pass 3-4 State Troopers all of whom will either be sitting in speed traps or will have someone pulled over. Good thing I ride a full sized van with a six cylinder - I CAN'T speed!!!!

:ride: Sometimes the biggest thing you can do to ensure your self preservation is to NOT give yourself the tools to your own demise.

I can get into plenty of trouble on my XRL, imagine me on a gixxer? :)

Oh trust me. That's one of the reasons I got rid of my FZ1:bonk:

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