Maintenance & Technical > KX450F / KX250F

2004 kx250f

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chap:
  I am looking at purchasing this 04 kx250f.Been doin a little reading on it and it says you have to drain the coolant before changin the oil filter.Is this true guys.Can you change just the oil without drainin the coolant.Not sure how it works.
  I am anxious to test this bike ride it(before i buy it)because it has an athena 290cc big bore kit in it.Anyone rode one of these,let me know.

don46:
I had an 04 250f, it was a good bike but had some first year issues, mostly valve problems, or more precisely the valve springs were to weak. I would think the previous owner would have had that problem taken care of by now. As to your oil filter issue, in stock form you did have to drain the coolant to change the filter, they changed the design in 05, you can purchase a aftermarket coolant cover/oil filter cover, in fact I've seen many on ebay. I wouldn't let that bother me, maybe it's been changed already, or you can change it.

Always keep a clean airfilter, change the oil, and most of all make sure the valves are adjusted properly. If you follow those three simple things it will run for along time.

Good luck

Don

chap:
   Thanks for the info don it really helps.I think i am going to get the bike it sounds like a good deal.Will let you know how it works with the 290cc kit in it.

Dutch-K5 Fan:
I ride the yellow version for 4 year now. Great bike and had minor problems. Mostly my own fould.
Change the valve springs with every piston change. You gain 1 horse over old springs.
13front 50 rear sprocket works the best, than you can ride it like a mini 450 in third and fourth gear al time. 175 or 178 main. Boyeson waterpomp/oilfiltercover. I ride 2 races and change oil, with 2 oil changes a filter. Always use Kendall 5w50, same viscosity used by KRT (Kawasaki Racing Team MX).
Have FUN with that ride( or test ride) :mrgreen:


   Dutchie

don46:
Dutchie,

You change valve springs every Piston? seems like it would get kinda expensive, how often do you change pistons? I change 2-3 times a year. I install the Pro Circuit valve springs when new, ride it a year and get rid of it. My 450 I'm going to keep for 2 years, the 07 has 3 HP more than the 08

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