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Old 02-07-2011, 12:38 PM   #7321
jesusgatos
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Thanks for the reply. We're running almost exactly the same gearing, and I'd guess that's about how much oil it's consuming. No big deal, but doesn't that seem excessive? I mean, what is it about these engines that they gobble-up oil?
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Old 02-07-2011, 12:54 PM   #7322
Blakebird
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Quote:
Originally Posted by Shibby! View Post
I would still like to argue the engine is still a race, or high performance engine. It was a robust design for robust racing, but it's not made to do miles. If it were you'd have an engine much like the XR, DR, DRZ, and KLR, etc. It's a robust high performance engine and through good engineering and robust design capable of doing higher milleage, but at the same time not designed for it.
By using that criteria, the XR600R was a race engine too? It was also a successful Baja racebike, and the 650R is essentially a liquid cooled version of a similar format (without RFVC).

Yet the GB500, NX650/Dominator, XR650L, etc all used the same basic engine. There were differences in tuning, but the basics were the same - and the GB500 WAS design as a streetgoing machine - and I'll be 80% of the XR650L's out there are used on pavement more than offroad.
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Old 02-07-2011, 01:05 PM   #7323
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Quote:
Originally Posted by jesusgatos View Post
Thanks for the reply. We're running almost exactly the same gearing, and I'd guess that's about how much oil it's consuming. No big deal, but doesn't that seem excessive? I mean, what is it about these engines that they gobble-up oil?
Since I have never seen smoke to indicate actual oil burning, I would guess it is more closely related to oil vapor being drawn from the crank case. Sure, compared to the XRL I had, it seems excessive, but then a whack of the throttle reminds me why I am not that overly concerned about the extra usage. That's saying a lot for me. I tend to be meticulous about such things, so it was a bit hard for me to "let go" over the whole issue. No smoke at the pipe and no gunk on the plug, guess I'll add a little more and call it good.

-Joe
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Old 02-07-2011, 01:28 PM   #7324
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Quote:
Originally Posted by Blakebird View Post
By using that criteria, the XR600R was a race engine too? It was also a successful Baja racebike, and the 650R is essentially a liquid cooled version of a similar format (without RFVC).

Yet the GB500, NX650/Dominator, XR650L, etc all used the same basic engine. There were differences in tuning, but the basics were the same - and the GB500 WAS design as a streetgoing machine - and I'll be 80% of the XR650L's out there are used on pavement more than offroad.

It can be called whatever we want it to be called. I guess I'm the only one who doesn't expect this engine to last forever without issues. I'm fine with that. I'm on the mindset that it wasn't designed to drone for 1000's of miles on end without problems, and so I don't expect it to.

I don't even know what's being talked about anymore.

I'd sooner read about interesting things or important stuff rather then ramblings about how durable a thumper can be and what kind of mileage to expect from it. It's been covered before. (search for XRR and mileage)

So with that said, I'll drop the subject so we can return back to our normal programing of quality XRR talk/reading.
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Old 02-07-2011, 02:18 PM   #7325
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If it is burning oil why don't you try out some different brands of quality oil and see if that makes a difference?

Should see some stay in there better than others.

Joe
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Old 02-07-2011, 02:43 PM   #7326
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Quote:
Originally Posted by Ironwood View Post
If it is burning oil why don't you try out some different brands of quality oil and see if that makes a difference?

Should see some stay in there better than others.

Joe
That may well be the case, but I just don't see it as being that critical from my perspective. The sceduled maintenance calls for 600 mile oil changes. Since I am mostly riding on the street, I change my oil at 1,000 miles. I don't really start seeing a loss until I am into the last half of the 1,000, so topping it off once or twice before the next change isn't all that bad in my book.

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Old 02-07-2011, 03:09 PM   #7327
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I wouldn't call the XR650R engine a "race engine". It's nowhere near as maintenance intensive as a current 450cc race engine. It's a low compression, low RPM engine comparatively.
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Old 02-07-2011, 04:40 PM   #7328
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I change the oil frequently enough, that if it did go through a bit of oil - it gets topped off with a fresh new supply before it could become an issue.

Lots of pavement miles puts you in the realm of checking it like you would a street bike - less often. In the dirt my oil gets looked at virtually every time I take it out.... if I were commuting on it, that inspection would probably get lax and normal consumption would seem to be exaggerated.

For peace of mind, if I were riding that many pavement miles....I would just change the oil often, and the filter every other oil change. Then you could rest a bit easier.
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Old 02-07-2011, 09:17 PM   #7329
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Quote:
Originally Posted by jesusgatos View Post
How is the 650R engine any different than a DRZ engine? Obviously 250cc's...

But seriously, what makes you think this is such a high performance engine? I'd say all signs point to it being more similar to the older air-cooled XR engines than then newer CRF's (which is what I'd call a race engine).
Agreed.
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Old 02-07-2011, 09:37 PM   #7330
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My experience with big singles is they all use oil when spun up. Big lung creates more crank case pressure at higher RPMs which makes the rings and valve seals job harder. The whole reason I got a XRR was because it was built to last with a relaxed maintenance schedule. No "racemotor" maintenance/rebuild schedule for me.
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Old 02-07-2011, 10:09 PM   #7331
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Before I ran a bunch of mud through the motor (not-so-fun story), I was commuting 100+ miles per day on pavement at 80mph. I was changing the oil roughly every 1,000 miles and checking it every fill-up. I had almost no oil consumption over the 1k miles between oil changes, as in I didn't ever need to add any. Here's the rebuild ready to go in: HRC Copy cam (XR's Only), Kibblewhite valves with 3-angle grind, new stock piston and rings, newly re-nikasil'd cylinder and a brand new TM-40 . Can't wait to see how she runs. Also doing all the bearings. Hopefully get it all back together this weekend.



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Old 02-08-2011, 06:03 AM   #7332
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Quote:
Originally Posted by jesusgatos View Post
How is the 650R engine any different than a DRZ engine? Obviously 250cc's...

But seriously, what makes you think this is such a high performance engine? I'd say all signs point to it being more similar to the older air-cooled XR engines than then newer CRF's (which is what I'd call a race engine).
Why do you think the BRP engine is not a race engine?

Why do you think the CRF are a race engine?
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Old 02-08-2011, 06:11 AM   #7333
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Originally Posted by mortaygo View Post
I wish I could find someone in Australia to do this work for me, I have no idea, but would love to be able to run a GPS and my Trail tech Cyclops HID spot light.... that is my one disapointment with my XRR...

Joe
There is a mob in Australia Joe,
He does all the Rallye bikes, GHR 650R's etc.

He did my bike,
200 watt stator, you can get 140 watt stator, 100 watt headlight,
run GPS, install battery's HID's etc

Google Bettabikes, there in South Aussie
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Old 02-08-2011, 06:36 AM   #7334
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I believe that any engine could be considered a race engine if it is in something that you race
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Old 02-08-2011, 06:54 AM   #7335
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Originally Posted by xr400r View Post
I believe that any engine could be considered a race engine if it is in something that you race
Thats the way I see it also. What bike made ever had an engine for commuting? A BMW 650 Dakar? Hell that still has been raced a bit.

In offroad situations the engine doesn't make a race bike, suspension and handling do. Plus the XRR was designed for a race that demanded a rediculous amount of give in terms of durability.

Just because you don't need to work on it all the time doesn't mean its not high performance. It just seems that way when compared to the 450 motocross bikes that are beating themselves to death trying to match performance with a two storke.



I told myself not to get involved in this and here I go..
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