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Athena Big Bore Kits - Yamaha

From $1,279.00
Where to buy

Get more power and torque with premium quality European big bore kits that include, cylinder, piston, rings, and all gaskets required for a hassle free conversion.

Spare pistons, rings, and gaskets also available.

Can't see your bike listed here, or the product you want is not in stock? Get in touch to see if there's a kit for your model and ask about price and availability.

  Code Description RRP Availability
BIG BORE KIT YAMAHA YZ125 '22-'25 DIA. 58 mm 144 cc (2-STROKE) Image GAC 0485100101 BIG BORE KIT YAMAHA YZ125 '22-'25 DIA. 58 mm 144 cc (2-STROKE) $2629.00 In stock Enquire now
STANDARD BORE KIT WR F 250 '01-'12 / YZ F 250 '01-'07 Image GAC 0485100011 STANDARD BORE KIT WR F 250 '01-'12 / YZ F 250 '01-'07 $1279.00 In stock Enquire now
BIG BORE KIT YAMAHA YZ250F 01-07 / WR250F 01-12 290cc Image GAC 0485100012 BIG BORE KIT YAMAHA YZ250F 01-07 / WR250F 01-12 290cc POA Not in stock Enquire now
BIG BORE KIT YAMAHA YZ250F 250 DIA. 83 mm / 290 cc '08-'13 Image GAC 0485100026 BIG BORE KIT YAMAHA YZ250F 250 DIA. 83 mm / 290 cc '08-'13 POA Not in stock Enquire now
BIG BORE KIT DIA. 85mm/300cc YAMAHA 250 WR F ?20-> / YZ F ?19-> Image GAC 0485100073 BIG BORE KIT DIA. 85mm/300cc YAMAHA 250 WR F ?20-> / YZ F ?19-> POA Not in stock Enquire now
BIG BORE KIT YAMAHA YFZ 450 S QUAD-ATV '04-'11 98mm/478cc Image GAC 0485100016 BIG BORE KIT YAMAHA YFZ 450 S QUAD-ATV '04-'11 98mm/478cc POA Not in stock Enquire now
BIG BORE KIT YAMAHA YZ450F 03-05.WR450F 03-06 480cc Image GAC 0485100014 BIG BORE KIT YAMAHA YZ450F 03-05.WR450F 03-06 480cc POA Not in stock Enquire now
BIG BORE KIT YAMAHA YZ450F 06-09. WR450F 07-15 (478cc) Image GAC 0485100021 BIG BORE KIT YAMAHA YZ450F 06-09. WR450F 07-15 (478cc) POA Not in stock Enquire now
BIG BORE KIT YAMAHA YZF 450 10-16 Image GAC 0485100054 BIG BORE KIT YAMAHA YZF 450 10-16 POA Not in stock Enquire now
BIG BORE KIT YAHAMA YZ 250 F '14-'18 / WR 250 F ' 15-'18 276 cc Image GAC 0485100050 BIG BORE KIT YAHAMA YZ 250 F '14-'18 / WR 250 F ' 15-'18 276 cc POA Not in stock Enquire now
BIG BORE KIT YAMAHA YZ F 250 '19-'24 / WR F 250 '20-'24 283cc Image GAC 0485100097 BIG BORE KIT YAMAHA YZ F 250 '19-'24 / WR F 250 '20-'24 283cc $1850.00 In stock Enquire now

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