XR650L highway speeds, is 65mph too fast?

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XR650L highway speeds, is 65mph too fast?

Post by 4Strokes » Sat May 14, 2016 3:15 pm

Topic: XR650L highway speeds, is 65mph too fast?
Author: JRe
Posted: 06/25/2008 6:48:10 PM

Just got a 650L (2294 miles '00) a few weeks back and was wondering if 65mph on the highways is too fast for a thumper? My commute is around 100miles round trip.

Reply by Jlutty650L on 06/25/2008 11:55:45 PM
Welcome!!!

I would ask what tire size and what sprockets are on it before I can answer that.

5th gear is a 1:1 ratio, so stock sprockets and tire size would mean under 3000 RPM at 65.

I would do 70 all day. Just get an oil temperature dipstick and worry when it goes over 285.

Reply by JRe on 06/28/2008 03:02:46 AM
Thanks for the reply, i have stock everything, the guy whom i got it from had it 8yrs and only put 2294 miles on it

Reply by kubiak on 06/28/2008 12:02:03 PM
stock 65 mph is perfect.i run my 06 xr650l at 65 to 70 all day commuting and its got 21,000 trouble free miles so far.

Reply by Rotorcraft on 06/30/2008 12:52:01 PM
I run my 650 70 MPH when I go to work wich is 30 miles one way. Stock drivetrain (15-45) it will do that all day, my oil temps are 225f max with a cooler.

Reply by flatfender on 07/05/2008 10:17:15 PM
The TopSpeed gearing calculator shows that cruising at 65 mph would be 4,400 rpm using stock gearing and rear tire size as inputs. At 4,500 rpm the piston is traveling up and down 75 times per second! For a 100 mile daily commute I would follow the good advice of buying a dipstick thermometer and make sure your bike never has a low oil level or is run continuously after it reaches hot. It seems that running hot or high oil temperatures is a reoccurring topic on the XR650L forum, even after re-jetting. That said, I agree with 65 mph being no problem.

Reply by vivianm on 07/27/2008 02:07:43 AM
*still waiting for parts* to get back on the road...but 65mph is ok, but I'm throwing a 40 tooth rear on it, just to make to a bit easier. I also noticed that trimming the front fender was better at speed as it made it more stable BUT trimming does mean you eat more shit of the front type (only found that 'after' the trimming...)

Each time I mod, I also notice some downside...I guess thats why they made it the way the did...

Reply by HorseRider650 on 07/27/2008 1:11:24 PM
If you can handle driving a dirt bike at 65mph+ on the highway then don't worry about your Honda. A stock xr650l can easily drive at interstate speeds without damage. But be careful on the freeway! Your bike is too light and top heavy. This can be disastrous around trucks.

Reply by vivianm on 09/26/2008 04:14:42 AM
bike back, new tank (no fairings) and done the 40 tooth rear...its ROCKS for highway stuff/road. the gearing really improves the ride feel and makes the bike engine seem to cruising than reving. it like I just installed overdrive.

As the guys say, it will still perform admirably on standard (yes 4400 is correct rpm for 65mph) mine does 3800 now with the 15/40.

To me, up-gearing felt right as every now and again, I would subconciously try and upshift when on standard gearing while on the open roads.

I've just bought a 15/14/13 counter sprockets for my 40 and 45 rear...just so I can tweak it for different applications.

longer road 15/40
compromise 15/45 or 14/40

haven't tried these yet (13/40 or 14/45)...but looking for combo's that work for the same chain length.

65 is fine for standard...just depends how long you want to ride at that speed.

Reply by Old dog on 09/26/2008 7:17:42 PM
I found with the stock 15/45 gearing, my Sumo XR650L with 17's on it would cruise comfortably at 75 to 85 mph. I've since changed my gearing to 14/45 and now anything above 75 mph and the engine is screaming. Don't get me wrong, I love the 14/45 gearing for around town (hello wheelies), but at high speeds it puts more stress on the engine.

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