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Old 02-09-2010, 07:49 AM   #226
scottwr
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Quote:
Originally Posted by tobys
Has this been discussed yet? What's your favorite sprocket combo?
I run 13/52 for the really tight singletrack here in Pennsylvania, and 14/52 for dual sporting double track etc... 09 450 exc
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Old 02-09-2010, 09:39 AM   #227
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Quote:
Originally Posted by neduro
I'm running 14/50 for general use, which offers a low enough first for anything, and a nice cruise. I also tried 14/52 and did not like it- I can't exactly explain, since I didn't need more on top, but it seemed like 2nd wasn't quite as useful for singletrack.

In a few weeks I'm headed to Mexico, and debating gearing up, although I plan on riding a lot of technical stuff down there. Would go 14/48 or 14/46... will post how that works.
I think I'm 14/50 today, and I'm pretty happy with it. I may buy a 48 though, just to try. I've not done any freeway travel yet though...

Thanks!
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Old 02-09-2010, 11:41 AM   #228
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14/50 here too
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Old 02-09-2010, 11:46 AM   #229
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How many miles on the top end is too many?

What kind of miles are you guys pushing your top ends to on the 450 / 530 exc's? I have an 08 450 with 144 hrs. / 5k miles and am thinking 200 hrs for a top end. Would you also do the bottom end or will they go longer?
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Old 02-09-2010, 01:30 PM   #230
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Running 14/52 myself. Ran 14/50 but felt it was to tall. Thinking about trying 13/50 to close the gap between 2nd and 3rd a little....
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Old 02-09-2010, 02:11 PM   #231
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Quote:
Originally Posted by K80JIM
What kind of miles are you guys pushing your top ends to on the 450 / 530 exc's?
It depends on many factors (how you ride, air filter maintenance, etc) so I think there is no single correct answer.

I would do a top end when any of 3 things starts to happen: 1) excessive oil consumption, 2) excessive valve movement (clearance changes after every few hours) or 3) loss of power/ performance (as measured by a compression test if necessary).

I'm sure this isn't what the book says to do, but I'd ride the bike until one of those 3 things happened, whether it was 50 hours or 500, and then open her up and replace at a minimum rings, and at a maximum everything top to bottom, depending on what I found once I was in there.
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Old 02-09-2010, 02:18 PM   #232
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Gas tanks?

Gents, I just got a 530 and I am thinking of a new tank to get more range as well as protect the radiator. i am suprised that so many people go with the 3 gallon or 3.4 gallon when the bike comes standard with a 2.4 gallon. It seems like a 3 gallon tank is barely worth it for the marginal increase. Am I missing something?

steve
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Old 02-09-2010, 03:19 PM   #233
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Quote:
Originally Posted by dirtdiver
Gents, I just got a 530 and I am thinking of a new tank to get more range as well as protect the radiator. i am suprised that so many people go with the 3 gallon or 3.4 gallon when the bike comes standard with a 2.4 gallon. It seems like a 3 gallon tank is barely worth it for the marginal increase. Am I missing something?

steve
My 3gal is a nice replacement as a stocker:
1. I can see the level
2. the extra is perfect for a range I ride most often
3. it protects the radiator
4. same as stocker for ergo.

Out here in CO a 150 range is perfect for me... I do not know what you are riding or looking for? Stock may be perfect if your range requirements are less??
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Old 02-09-2010, 05:19 PM   #234
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Quote:
Originally Posted by dirtdiver
Am I missing something?
A gallon is a lot of pushing.

For myself, I couldn't almost make most rides stock, but I'd be shaving it close. Another gallon gets me there with an insurance policy.
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Old 02-09-2010, 06:04 PM   #235
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Cool2 tanks

Quote:
Originally Posted by dirtdiver
Gents, I just got a 530 and I am thinking of a new tank to get more range as well as protect the radiator. i am suprised that so many people go with the 3 gallon or 3.4 gallon when the bike comes standard with a 2.4 gallon. It seems like a 3 gallon tank is barely worth it for the marginal increase. Am I missing something?

steve
Got a 3.4 for everyday use, a 6.3 when I'm going to cover some ground and gas may be far between, like the CDT trip we are going to do this summer
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Old 02-09-2010, 08:25 PM   #236
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Roughly what kind of range should I expect? I need probably 100-110 miles before I go on reserve. Riding dirt in the 2nd 3rd gear range. I geared my new bike down to 14/48. I realize that this is subjective.

steve
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Old 02-09-2010, 09:06 PM   #237
osteo
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Quote:
Originally Posted by K80JIM
What kind of miles are you guys pushing your top ends to on the 450 / 530 exc's? I have an 08 450 with 144 hrs. / 5k miles and am thinking 200 hrs for a top end. Would you also do the bottom end or will they go longer?
I went through this debate myself and I've got approx 220hrs on my 450 (11,000km).

Pulled the motor all set to do a full rebuild (top and bottom) as that is what the service manual says and ordered all the parts. Decided to do a leak down test first and had a very knowledgeable buddy assist (long time KTM rider and engineer, not that the test is hard to do) and it tested at 10%.

Burns a tiny bit of oil, something like 50ml over 700km, all depends (which it did from brand new and had a leak down test at 2hrs as I was paranoid and it was 3%), valves checked and adjusted regularly, oil changed every 1500km, or sooner depending on how hard I have been riding.

So, decided to do nothing, checked the valves, changed the clutch, fresh oil, etc... and dropped it back in the bike. The only thing we saw was the valve seals could be replaced, but not urgent by no means, but I'll do another leak down test mid season and see what I get.

If it needs to be done then, I'm not riding for a week and it gets done.

D
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Old 02-09-2010, 11:02 PM   #238
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Quote:
Originally Posted by CodyY
14/50 here too
I ran 14/48 and it was way too tall for me so I went with the 13t CS sprocket. With 14-48, I couldn't shift into sixth until the bike was over 70mph and I needed a lower gear for the tight sections for sure. Even at 13/48, the 6th gear will still lazily cruise along at 70mph, but at least it will pull consistently at that speed and not lug down like it did with 14-48.

I think 13/50 would probably be perfect for the singletrack that we ride out east, but I haven't tried it, so I can't really comment. I am waffling on the 50t rear because I'd have to get a new chain, or at least add links to the stocker.

Plus I've only got a few hours on that pretty dual-compound Supersprox rear

dc
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Old 02-10-2010, 09:32 AM   #239
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Quote:
Originally Posted by dirtdiver
Roughly what kind of range should I expect? I need probably 100-110 miles before I go on reserve. Riding dirt in the 2nd 3rd gear range. I geared my new bike down to 14/48. I realize that this is subjective.
Jetting will vary your mileage a lot, but a well-set up carb and reasonable throttle use will see anywhere between 30-45 mpg, in my experience. So, to be assured of 110 miles, you want to have 3.5 gallons, which might easily get you close to 200 if things are at the higher end of the scale.

Personally, I find that aggressive riding on lean high altitude jetting yields about 35-38mpg, and dual-sporty use gets into the 40's. Only soft conditions with a lot of wheelspin drop me below 30.

Hope that helps.
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Old 02-10-2010, 01:23 PM   #240
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Quote:
Originally Posted by Country Doc
I ran 14/48 and it was way too tall for me so I went with the 13t CS sprocket. With 14-48, I couldn't shift into sixth until the bike was over 70mph and I needed a lower gear for the tight sections for sure. Even at 13/48, the 6th gear will still lazily cruise along at 70mph, but at least it will pull consistently at that speed and not lug down like it did with 14-48.

I think 13/50 would probably be perfect for the singletrack that we ride out east, but I haven't tried it, so I can't really comment. I am waffling on the 50t rear because I'd have to get a new chain, or at least add links to the stocker.

Plus I've only got a few hours on that pretty dual-compound Supersprox rear

dc
14/50 gets me into 6th at anything over 45mph for cruising and will pull right at 100 mph if I need it. And that's with a Rekluse clutch.

First gear for "tractor" and 2nd/3rd for single/two track riding. Works great for me even racing harescrambles.
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