Athena Big Bore Kits - Yamaha

From $995.00

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.

Not all products are listed here - check the downloads section for a complete application list. Kits not in stock can usually be supplied in three to four weeks, depending on availability at the factory.

Code Description RRP Availability
GAC 0485100011 STANDARD BORE KIT YZF250 '01-06 $995.00 In stock Enquire now
GAC 0485100030 BIG BORE KIT YAMAHA YZ125LC 05-18 (2-STROKE) $1850.00 Not in stock Enquire now
GAC 0485100012 BIG BORE KIT YAMAHA YZ250F 01-07 / WR250F 01-12 290cc $1495.00 Not in stock Enquire now
GAC 0485100026 Big Bore Kit Yamaha YZ250F 250/290 08-13 $1495.00 In stock Enquire now
GAC 0485100016 BIG BORE KIT YAMAHA YFZ 450 S QUAD-ATV '04-'11 98mm/478cc $1495.00 Not in stock Enquire now
GAC 0485100014 BIG BORE KIT YAMAHA YZ450F 03-05.WR450F 03-06 480cc $1200.00 In stock Enquire now
GAC 0485100021 BIG BORE KIT YAMAHA YZ450F 06-09. WR450F 07-15 (478cc) $1195.00 Not in stock Enquire now
GAC 0485100042 BIG BORE KIT 293 CC YAMAHA YZ 250 LC '03-18 (2-STROKE) $2899.00 Not in stock Enquire now
GAC 0485100054 BIG BORE KIT YAMAHA YZF 450 10-16 $1500.00 In stock Enquire now
GAC 0485100050 BIG BORE KIT YZ 250 F '14-'18 276 cc $1200.00 Not in stock Enquire now
GAC 0485200001B CYLINDER HEAD BIG BORE KIT YAMAHA YZ125 '05-16 - NLA $99.00 In stock Enquire now
GAC S4C05800001A BIG BORE PISTON/RING KIT 57.94 YZ125 '97-'16 $295.00 In stock Enquire now
GAC S4C05800001B BIG BORE PISTON/RING KIT 57.95 YZ125 '97-'16 $295.00 In stock Enquire now
GAC S4F08300001B BIG BORE PISTON/RING KIT YAM YZ250F 01/07 WR250F 01/09 $395.00 In stock Enquire now
GAC S4F08300008B BIG BORE PISTON KIT d.83 YAMAHA YZ250F 08/10 $399.00 In stock Enquire now
GAC S4F09800004B BIG BORE PISTON/RING KIT YAMAHA YFZ450 04/06 4 WHEEL $399.00 In stock Enquire now
GAC S4F09800005B BIG BORE PISTON/RING KIT YAMAHA YZ450F (2WHEEL) 03/09 WR450F 03/10 $419.00 In stock Enquire now
GAC S4F102000040 BIG BORE PISTON 100 MM YZF 450 2010-2012 $419.00 In stock Enquire now
GAC S4F07200006A BIG BORE PISTON/RING KIT YAMAHA YZ 250X '16 $375.00 In stock Enquire now
GAC 0485160014 BIG BORE GASKET SET YZ125 '05-'16 $99.00 In stock Enquire now
GAC 0485160007 BIG BORE GASKET SET YZ250F '01-'07 / WR250F '01-'12 $119.00 In stock Enquire now
GAC 0485160009 BIG BORE GASKET SET YAMAHA VARIOUS MX / ENDURO / QUAD-ATV $159.00 Not in stock Enquire now
GAC 0485160013 BIG BORE GASKET SET YAMAHA YZ450F WR450F 07/10 $159.00 In stock Enquire now
GAC 0485160025 BIG BORE GASKET SET YZ450F 2010-2012 $159.00 In stock Enquire now
GAC 0485160183 BIG BORE GASKET SET YAMAHA YZ 250X '16 $49.00 In stock Enquire now
GAC 0485303025 EXHAUST VALVES PAIR YZ250 DIAM 72 $479.00 In stock Enquire now
GAC S41316125 BIG BORE RING SET YAMAHA YZ125 '05-14 - now use GAC S41316157 $25.00 Not in stock Enquire now
GAC S41316133 RING SET YZ250F 01/10/WR250F 01/09/KX250F 04/10 RMZ250 04/09 $59.00 Not in stock Enquire now
GAC S41316027 BIG BORE RING SET YZ450f 03/09. WR450F 03/10 $69.00 In stock Enquire now
GAC S41316216 BIG BORE RING SET YZ450F 2010-2012 $55.00 In stock Enquire now
GAC S41316157 PINSTON RING SET YZ125 '05-'16 $20.00 In stock Enquire now