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Old 05-11-2015, 06:43 AM   #1
wiseblood OP
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Am I killing my EXC?

Hey All!

Just a probably dumb question: I've got a 2003 KTM 525 EXC. I live two hours each way from any interesting dirt trails or roads. My assumption is that it would be a bad idea to ride the EXC to and from the trails because it would cause a huge amount of wear on the motor.

Because of this, any riding I want to do involves pulling out the trailer. (I don't have a hitch carrier capable of holding the EXC safely.) This causes me to pass on many riding opportunities, because... it's a damn pain in the ass!

So, my question: Assuming I don't mind the discomfort of riding on the roads for two hours each way, and assuming I am changing oil every 15 or so running hours, what is the consequence of that sort of duty on my EXC?

Thanks!

(BTW, I currently kinda suck at riding off-road, which is why I don't want to get a heavier, more road-capable bike for trails. )

In current sumo trim:



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Old 05-11-2015, 06:48 AM   #2
wiswoodsguy
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I highly doubt that lengthy road sessions will do any harm to your EXC. I've ridden my 01 520 EXC similar distances with absolutely no recourse. If anything, droning on pavement is the least stressful abuse your motor will see, off road can be far more grueling
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Old 05-11-2015, 06:58 AM   #3
Anders-
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I would be worried about the drivetrain unless you got a cush hub.
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Old 05-11-2015, 07:42 AM   #4
wiswoodsguy
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Originally Posted by Anders- View Post
I would be worried about the drivetrain unless you got a cush hub.
The cush hub would be needed more with the Sumo set up, knobs give way to getting too much traction on the pavement.

Highway riding would not tax the drivetrain at all
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Old 05-11-2015, 08:01 AM   #5
CanadianX
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If you are worried about it why not pick up a hitch carrier? Cheap to buy easy to use.

Here's my short thread on one I picked up for $69+tax (CAD) at Princess Auto.

http://advrider.com/forums/showthrea...1035136&page=3
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Old 05-11-2015, 08:16 AM   #6
LittleRedToyota
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you're fine.


you are putting a lot less stress on the bike riding it to and from those trails than you are riding it on the trails. the heavenly transmission KTM put in EXCs and XC-Ws makes sure of that.

also, as far as needing a cush hub goes...you probably don't. as mentioned above, knobs on knobbies provide some cushioning. also, at least the newer EXCs actually have cush clutches--though i'm not sure what year they started doing that.

there are also a lot of other kinds of dual sport bikes that typically see a lot more pavement miles than EXCs do...like the DRZ, etc...that do not have cush hubs.

if you're worried, though, just be smooth. no popping wheelies on the street, etc. (though i do that all the time on my plated XC-W and it have never caused any problems. i also ride it 20 miles or so on roads to trails all the time. commute to work on it sometimes. and have taken it on 300 miles road trips. none of that stuff has hurt it at all.)
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Old 05-11-2015, 08:20 AM   #7
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Just ride it and stop worrying

I Have done many many multi day dual sport trips with my 06 525, involving hours of Tarmac every day.
Totally no problem if you don't thrash it.
Boring yes............problem. ......no!
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Old 05-11-2015, 08:25 AM   #8
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Originally Posted by CanadianX View Post
If you are worried about it why not pick up a hitch carrier? Cheap to buy easy to use.

Here's my short thread on one I picked up for $69+tax (CAD) at Princess Auto.

http://advrider.com/forums/showthrea...1035136&page=3
My vehicle has only a Class II hitch, rated for 350 lb tongue weight. It's very iffy that it could hold a 260 lb bike and 50 lb carrier whilst extending out 25% further from mounting point than my trailer ball. FWIW, I do have a hitch carrier already. I just don't feel comfortable carrying the EXC on it.
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Old 05-11-2015, 08:27 AM   #9
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Originally Posted by wiswoodsguy View Post
I highly doubt that lengthy road sessions will do any harm to your EXC. I've ridden my 01 520 EXC similar distances with absolutely no recourse. If anything, droning on pavement is the least stressful abuse your motor will see, off road can be far more grueling
Quote:
Originally Posted by wiswoodsguy View Post
Highway riding would not tax the drivetrain at all
Quote:
Originally Posted by LittleRedToyota View Post
you're fine.

you are putting a lot less stress on the bike riding it to and from those trails than you are riding it on the trails. the heavenly transmission KTM put in EXCs and XC-Ws makes sure of that.

Thanks, everybody!

That really opens up some options for me!
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Old 05-11-2015, 08:48 AM   #10
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No the bike won't die a sudden death... but... an RFS engine has a limited life between rebuilds. My research came up with 12,000 miles as very optimistic before a rebuild. Guess some have gone 20,000 while a hard ridden trail bike may need rings at 2,000 miles.

Reality is most riders don't have the free time to wear one out.. But if you do ride a lot many riders think it's a waste to rack up street miles. I know I do, I ride a 690 to the trails and truck my 450..
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Old 05-11-2015, 08:57 AM   #11
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No the bike won't die a sudden death... but... an RFS engine has a limited life between rebuilds. My research came up with 12,000 miles as very optimistic before a rebuild. Guess some have gone 20,000 while a hard ridden trail bike may need rings at 2,000 miles.

Reality is most riders don't have the free time to wear one out.. But if you do ride a lot many riders think it's a waste to rack up street miles. I know I do, I ride a 690 to the trails and truck my 450..

I assume when you say "Rebuild" you mean top AND bottom end?
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Old 05-11-2015, 08:59 AM   #12
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Quote:
Originally Posted by wiseblood View Post
I assume when you say "Rebuild" you mean top AND bottom end?
i think he's talking about top end only.

if he's talking about the bottom end, his sample is messed up or something.
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Old 05-11-2015, 09:20 AM   #13
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i think he's talking about top end only.

if he's talking about the bottom end, his sample is messed up or something.
12k miles on a top-end is actually WAAAAY more than I would have expected for an EXC! I think the service intervals for a top-end rebuild are something 150 hours. At an avg speed of 35 mph (), 12k miles is more like 350 hours!
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Old 05-11-2015, 10:29 AM   #14
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Originally Posted by wiseblood View Post
12k miles on a top-end is actually WAAAAY more than I would have expected for an EXC! I think the service intervals for a top-end rebuild are something 150 hours. At an avg speed of 35 mph (), 12k miles is more like 350 hours!
the service intervals in the manual are meaningless. they're based on pro-racer level use and on cover-your-ass for KTM.

i even do race mine (though not anywhere near pro-level) and didn't do a top end until 350 hours...and once i opened it up, i realized it didn't really need it, i just figured it was about time.

(i have the newer XC4 engine, though. but, many people say the RFS was more bullet proof than the XC4. i dunno, but RFSes don't need new top ends nearly as often as the manual says either.)
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Old 05-11-2015, 10:32 AM   #15
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Quote:
Originally Posted by wiseblood View Post
12k miles on a top-end is actually WAAAAY more than I would have expected for an EXC! I think the service intervals for a top-end rebuild are something 150 hours. At an avg speed of 35 mph (), 12k miles is more like 350 hours!
Yep, taking top-end. Saw one guy had 20,000 on one mostly street.

I'm at 200 hours and no plans to even do a compression test till 300 hours. Bike runs better and quieter now than when new.
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