I've got a 2012 KLX250S that I don't put a lot of miles on (not my only bike). It's around 10K right now. But I was re-perusing my owner's manual and came upon the "Periodic Replacement" table (page 87 in my manual), which requires that a bunch of stuff be replaced at various intervals, all of which are now past, since it's been 3 years since I did the 7500 mile service (time flies!) and the bike is 6 years old. These items include the air filter, oil & oil filter, the brake fluid, the coolant, fuel hoses, brake hoses, rubber parts of the master cylinders and calipers, and radiator hoses and o-rings. I went through my service manual to find the parts needing replacement, and went on bikebandit.com to see what this was going to cost me. I'm at $524 for parts, not including oil, coolant, and a few hoses that aren't available. Ouch! Plus it's looking like a pretty big project. Do other folks keep up with all this stuff? The fluids and filters are a no-brainer, but all the rubber parts seem like a lot for a bike that's garaged and is ridden mostly on pavement. By contrast, for example, the manual for my 2002 V-Strom specifies replacing only the fuel hoses and brake lines, and only calls for inspection of the cooling hoses, and doesn't mention rubber parts of the brake master cylinders and calipers at all.

As far as brake lines go, if I have to change those, I'm putting on Spiegler braided stainless lines, not OEM. The price is hardly any different.

 

My '06 is running the original coolant hoses and rear brake line. Front brake line changed to stainless a few years ago. Brake fluid and coolant have been changed a couple times and are due for another flush.

 

I do oil every 1000km, oil filter every other change. Clean my K&N filter as needed (depends how much dusty logging roads I ride) I do coolant and brake fluid yearly (probably not required but it's cheap to do) . Just inspect the fuel hoses, brake hoses, rubber parts of the master cylinders and calipers, radiator hoses and o-rings. while your servicing the related parts, replace as needed.

 

Can you say "manufacturer recommended overkill"? That's it.

 

With valve clearance checks, filters, bearings, the occasional greasing, and regular fluid changes you can go a long way. I made it 64,000 miles doing just that.
If it broke I fixed it but that was it.
It'd still be going if I could've stopped wringing it's neck at max rpm on my commute.
Keep your money for oil, tires, sprockets, and chains.

 

So, I decided to do everything on the list except the coolant hoses and the brake master cylinders, which brought the cost down considerably. Based on past experience, I can feel when there's a problem with the master cylinders, and they're up at the clean end of the brake circuits. And I'll inspect the coolant hoses.

 

i like to change the oil & filter every yr regardless of mileage. Coolant, i like to drain every couple of years and same with brake fluid. The rest, i fix when (if) it breaks. I say if cost so far my klx has been bullet proof !!!!! its a 2009, original owner, and i have a 351bb kit and a mikuni pumper carb. only 10k, but a hard 10k thats mostly off road and through ****ty demanding terrain. Only thing i'd say is if you go 351, check the oil level more frequently as you'll probably burn through more. Whereas previously you may be accustomed to never having to top up. My oil window is normally covered in crud. and i had become so accustomed to just doing my annuals. I'd say check every 1000miles on where your oil is at if you go big bore.

 

Surprisingly my oil has not gone down yet since my last oil change on my 351

 

The oil level has never changed on my stocker.