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GYTR Athena 290cc Big Bore Kit
GYTR Athena 290cc Big Bore Kit

$723.59 $803.99
10% Off - Save $80.40

Item #GYT006X

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5 Questions
Answered:   5
Not Yet:   0
TheMan22
Q: Is this for the yz 250 f 2016 model?
1 year 6 months ago
ExpertJohnB
Top 25
1 year 6 months ago
A: Only fits 01-07 Yz250F 01-13 WR250F
DecimalDave
Q: I understand That an Athena Big bore Kit is now available for WR250F 2015 model , if so please confirm details and where to purchase from
2 years ago
Also what specific parts are included in the kit eg Barrel piston rings pin gaskets ect
MotoSportExpert
Expert MotoSport Staff
2 years ago
A: If available through one of our suppliers, we would be happy to order it for you. Please call one of our sales professionals to inquire about special orders and availability.
Dirt Bike / ATV: 1-888-676-8853
Fuzzy
Q: What kind of power increase can you expect from this big bore kit on a WR250F?
2 years 1 month ago
Just trying to debate if it's more cost effective to install/tune the WR250F with this 290cc big bore kit, or just sell and upgrade to a WR450F or similar. (for the record, I'm not "unhappy" with the WR250)
MotoSportExpert
Expert MotoSport Staff
2 years 1 month ago
A: You will gain a noticeable few horsepower with the big bore 290 kit. It won't be 450 power but at the same time the 250 is going to be lighter and better handling than the 450. It will really come down to your riding style and personal preference.

http://www.athenaparts.com/files/pdfs/P400485100012.pdf
yamaha1
Q: Fits the original cylinderhead with this kit
Over 3 years ago
MotoSportExpert
MotoSport Staff Expert
Over 3 years ago
A: Yes the GYTR Athena 290cc Big Bore Kit will work with the stock head.
fred
Q: Could you please let me know the difference between this kit and the regular Athena big bore kit
Over 3 years ago
MotoSportExpert
MotoSport Staff Expert
Over 3 years ago
A: The GYTR Athena 290cc Big Bore Kit is built by Athena for Yamaha and will have the GYTR logo stamped into the cylinder.
Fitment
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# Part Numbers
Product Variant Manufacturer Part #
GYTR Athena 290cc Big Bore Kit GYT-0SS56-31-08