Kx250f Athena big bore kit! Help

Danpadula
Edited Date/Time 8/8/2014 7:26pm
What supporting mods do you think are needed for this kit on a 2010 250f My bikes only got around 30hours. And oil and all filters changed every 4 hours.
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Danpadula 8/6/2014 8:26am
8/6/2014 8:26am
Danpadula wrote:
What supporting mods do you think are needed for this kit on a 2010 250f My bikes only got around 30hours. And oil and all filters...
What supporting mods do you think are needed for this kit on a 2010 250f My bikes only got around 30hours. And oil and all filters changed every 4 hours.
or could it just bolt right on?
Paw Paw 271
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Paw Paw 271 8/6/2014 5:21pm
8/6/2014 5:21pm
It should be a direct bolt on, but you may want to consider a better exhaust pipe.

Paw Paw
Danpadula 8/6/2014 5:42pm
8/6/2014 5:42pm
Paw Paw 271 wrote:
It should be a direct bolt on, but you may want to consider a better exhaust pipe.

Paw Paw
Ive got the material and skill to make my own would that be beneficial? or what other exhaust should i get, If i got the exact measurements it would be great, and cheap! throw a little exhaust wrap on it and im golden!
MxKing809
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MxKing809 8/6/2014 6:02pm
8/6/2014 6:02pm
Paw Paw 271 wrote:
It should be a direct bolt on, but you may want to consider a better exhaust pipe.

Paw Paw
Danpadula wrote:
Ive got the material and skill to make my own would that be beneficial? or what other exhaust should i get, If i got the exact...
Ive got the material and skill to make my own would that be beneficial? or what other exhaust should i get, If i got the exact measurements it would be great, and cheap! throw a little exhaust wrap on it and im golden!
Idk man.... No offense but for you to build your own exhaust it wouldn't be worth it. Google your bike and year and find a transworld/RacerX/dirt rider test on your bike.... They'll usually recommend the best pipe/can combo

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Idaho747
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Idaho747 8/6/2014 6:08pm
8/6/2014 6:08pm
Those Athena kits are awesome. The only downfall is they make the bike run hot. I would think about a bigger water pump and impeller. Engine ice wouldn't hurt either
Sir Roostsalot 8/6/2014 7:57pm
8/6/2014 7:57pm
I had a 290 Athena kit on my 2005 and ran the stock pipe with no other mods. Word of caution: the timing chain adjuster hole was machined too small from Athena and had to be enlarged. Also the rings never seated properly because the cylinder bore was not perfectly round. The bore wore at 4 "square" points. The power was great but quality and craftsmanship was sub par. Not sure if they're better now because that was almost ten years ago. Also it burned oil after installing it.
Danpadula 8/6/2014 8:49pm
8/6/2014 8:49pm
Paw Paw 271 wrote:
It should be a direct bolt on, but you may want to consider a better exhaust pipe.

Paw Paw
Danpadula wrote:
Ive got the material and skill to make my own would that be beneficial? or what other exhaust should i get, If i got the exact...
Ive got the material and skill to make my own would that be beneficial? or what other exhaust should i get, If i got the exact measurements it would be great, and cheap! throw a little exhaust wrap on it and im golden!
MxKing809 wrote:
Idk man.... No offense but for you to build your own exhaust it wouldn't be worth it. Google your bike and year and find a transworld/RacerX/dirt...
Idk man.... No offense but for you to build your own exhaust it wouldn't be worth it. Google your bike and year and find a transworld/RacerX/dirt rider test on your bike.... They'll usually recommend the best pipe/can combo
Yea i get you, but i want to only build my own header, because im going for a "sleeper" apperance.
harescrambled 8/8/2014 7:26pm
8/8/2014 7:26pm
I have an 04 with the Athena 290 kit (standard compression) and stage 2 HotCams...this runs on 93 pump gas. I also run a Boyesen Supercooler water pump, Engine Ice, and oversize radiators (cheapo eBay oversize rads). I race local harescrambles, and GNCC...and sometimes trail ride. No overheating problems here. Also no issues with the quality of the Athena kit

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