Big Bore Kits

Home Page
Big Bore Kits
CNC Porting
CNC head repair
Wiseco Pistons
Nikasil Plating
New & replated Cylinders
4 stroke labor
2 stroke labor
Bikes for sale
Hop-Up Tips
Contact us
About Us
Links

Online Store
Basket Contents
Check out
Search in Online Store
Creat an online account

Big Bore Kits
Ship to:
Lukes Racing
2300 Patterson Lake rd
Pinckney, Michigan 48169-9762

We pay the return shipping. , we stock many Big Bore kits , call for availability 734-648-0103.

Our 2-stroke kits can be purchased by calling 734-648-0103

Click here to buy 4-stroke kits in our Online Store

CR80 1986-1995	Fully Ported 90cc $550.00		Fully Ported CR101cc $550.00 Click for picture and info Ported cr101
CR80 CR85 1996-2009	Fully Ported 90cc $550.00		Fully Ported CR101cc $550.00 Click for picture and info Ported cr101	Call about stroker 112
CR80 CR85 1996-2009		Fully Ported 1986-2004 CR105cc $600.00 Click for picture and info cr105	Fully Ported 2005-2009 CR105cc $600.00 Click for picture and info Ported cr105	Call about stroker 112
KX 60 1984-2003 RM60 2003 and newer			Fully Ported 68cc kit or 72cc kit $550.00 Click for picture and info
KX65/RM65 2000-2009			Fully Ported 72cc kit $550.00	"NEW" Fully Ported 85cc kit $600.00 Click for picture and info	"NEW" Athena 82cc big bore kit Click here for description in our online store
KX80 1988-1997			Fully Ported 107cc $550.00
KX100 1995-1997			Fully Ported 107cc $550.00	Click for picture and info kx107 non power valve
KX80/85/100 1998-2009	Fully Ported 92cc $600	Fully Ported 100cc $600	Fully Ported 107cc $600 Click here for picture and more info kx107	KX80/85/100 112cc Big Bore Stroker "NEW" Super mini Legal. Our price $750.00 Click here for more info
KTM85 all years		Brand new KTM 105cc big bore cylinder 52 mm bore $850.00 or $750.00 if you send us your old cylinder Click here for picture and more info KTM105	Fully Ported 105cc $950.00 or $850.00 if you send us your old cylinder	Call about stroker 112
RM85 2002-2004		Fully Ported 99.4cc $550.00 (case mod necessary) Click here for picture and more info RM100	Fully Ported 105cc $600.00 (case mod necessary) Click here for picture and more info RM105	Fully Ported Big Bore stroker112cc $1150.00 (case mod necessary) Click here for picture and more info RM112	Click here for pictures of RM85 big bore case mod for 99-112cc big bore kit.
RM85 2005-2009		Fully Ported 99.4cc $550.00 (case mod necessary) Click here for picture and more info RM100	Fully Ported 105cc $600.00 (case mod necessary) Click here for picture and more info RM105	Fully Ported Big Bore stroker112cc $1150.00 (case mod necessary) Click here for picture and more info RM112	Click here for pictures of RM85 big bore case mod for 99-112cc big bore kit.
RM100 2003-2009	Fully Ported 92cc $500.00	Fully Ported 100cc $550.00	Fully Ported 107cc $550	Click here for picture and more info rm107
YZ80 1993-2001 YZ85 2002-2009			Fully Ported 92cc kit or 103cc kit $550.00 (Crankcase modification necessary for 103 kit)	Call about stroker crank
134cc Big Bore kits for most 125's		Fully Ported 134cc kit $600.00	Fully Ported 144cc kit $600.00
265cc Big Bore kits for most 250's		Fully Ported 265cc $600.00 on your cylinder
YZ250 99-10		300 big bore kit $750 on your top end		Click here for picture and more info YZ300
Honda 4 stroke big bore kits
CRF250		CRF250R, CRF250X Athena 280CC Big Bore kit. 82mm Moly coated Forged 13-1 compression. No cylinder head or crankcase modifications neccessary. Bolt on kit. (Nikasil plated cylinder, piston kit and gaskets.) $635.00 or $600.00 if you send us your old cylinder Click to Buy now			$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
CRF450		CRF450 Athena 490cc Big bore kit $630.00 (Nikasil plated cylinder, piston kit and gaskets.) 100mm bore 11.6 to 1 compression. We will refund $50 for your old cylinder.	500cc 101mm 12.5-1 compression $850.00 This is a brand new cylinder casting. Nikasil plated bore. Click here for picture and more info	2002-2007 510cc Big bore Stroker 100mm bore +3mm crank $925 $50 refund for your old cylinder Click here to buy now	$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
XR650R	XR650R 2000-2006 11:1 compression 102.4mm Big Bore kit: Nikasil plated cylinder, Wiseco piston kit, and cometic top end gasket set. $525.	XR650R 2000-2006 10:1 compression 102.4mm Big Bore kit: Nikasil plated cylinder, Wiseco piston kit, and cometic top end gasket set. $500.		.	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
TRX400ex			400ex Honda 460cc big bore stroker kit. $875.00 Click here for picture and more info	.	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
TRX450 2004-2005	TRX450 470cc 96mm 10.5:1 $500.00 on your cylinder $200.00 core charge or 11.5-1 big bore kit. $525.00 on your cylinder $200.00 core charge	TRX450 480cc Athena Big bore kit $670.00 Brand new aluminum cylinder with Nickel-Carbide coating, 97mm forged and moly coated piston kit (piston,rings,pin and clips) and top-end gaskets.	TRX450 500cc Big bore kit $950.00 Brand new cylinder casting (Nikasil plated cylinder, piston kit and gaskets.) 99mm bore 12 to 1 compression. $950.00	TRX450 520cc Big bore kit: Brand new cylinder casting (Nikasil plated cylinder, piston kit and gaskets.) 101mm bore 13 to 1 compression. (Crankcase will need to be clearanced for this cylinder) $950.00	$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
TRX450 2006
Kawasaki/ Suzuki 4 stroke big bore kits
KX250F 2004-2005 or RMZ250 2004-2006	263cc 79mm $415.00 exchange Click here for picture and more info	270cc 12-1 compression 80mm JE piston $450.00 exchange Click here for picture and more info	Athena 290cc 83.mm 12.3 - 1 compression. This is a brand new aftermarket cylinder. $600.00 or $550.00 if you send us your old cylinder		$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
KX250F 2006
DRZ400 LTZ400 KLX400 KFX400 (Also see Stroker kits below)	435cc JE Pistons 94mm 12-1 compression $450.00 or $400 if you send your cylinder for the core charge. Click here for picture and more info	Athena 435cc 94.mm 12.3 - 1 compression. This is a brand new aftermarket cylinder. $600.00 or $550.00 if you send us your old cylinder Click here for picture and more info		450cc JE Piston 95.5mm 13-1 compression $750.00 or $700.00 if you send your cylinder for the $50.00 core charge. Click here for picture and more info	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
DRZ400 LTZ400 KLX400 KFX400	Stroker Crankshaft DRZ400 KLX400 Hot Rods complete STROKER(+5mm) crankshaft assembly. $337.00 (OEM piston will not work with this crank) Must use stroker piston. We offer the Hotrods 90mm Stroker piston and our 485cc 95.5mm big bore stroker Kit. ------>	Hotrods 90mm 430cc stroker piston kit. (use with +5mm stroker crank only. Retail $255.95 Our price $230.00	465cc Big Bore / Stroker Kit DRZ400 KLX400 Hot Rods complete (+4mm) Stroker crankshaft assembly. Big Bore cylinder, 12-1 compression 94mm JE Forged Stroker piston kit and cometic gasket set. $725.00 or $675.00 if you send your cylinder for the $50.00 core charge. Buy now in our online store	480cc Big Bore / Stroker Kit DRZ400 KLX400 Hot Rods complete (+4mm) Stroker crankshaft assembly. Big Bore cylinder, 13-1 compression 95.5mm JE Forged Stroker piston kit and cometic gasket set. Click here for picture and info Buy now in our online store	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
RMZ450 Bike	474cc 12-1 or 13-1 compression 98mm Wiseco Forged piston $500 exchange		Athena 490cc Big bore kit: Brand new cylinder casting (Nikasil plated cylinder, piston kit and gaskets.) 100mm bore Forged piston kit. $630.00 ($50.00 off if you send your old cylinder.) Click here for picture and more info	RMZ 450 490cc Big Bore kit 12.8:1 100mm $500 exchange $300 core charge Click here for picture and more info	$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
LT-R450 06-07 Quad			LT-R 450 06-07 490cc 100mm Athena big bore cylinder kit $635 ($50.00 off if you send your old cylinder.) Click here for picture and more info		$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
Yamaha 4 stroke big bore kits
YZ250F 2001-2004	263cc 79mm $415.00 exchange Click here for picture and more info	270cc 80mm JE $450.00 Click here for picture and more info	YZ250f 290cc big bore Kit. Brand New Big Bore Cylinder assembly, $450.00 and up click for more info or Buy now in our online store	Athena 290cc 83.mm This is a brand new aftermarket cylinder. $600.00 or $550.00 if you send us your old cylinder	YZ250f big bore / stroker 310cc. Fits 2001 through 2002. Total for the kit: $980.00 click for more info Buy now in our online store
YZ250F 2005-2009	263cc 79mm $415.00 exchange Click here for picture and more info	270cc 80mm JE $450.00 Click here for picture and more info	YZ250f 290cc big bore Kit. Brand New Big Bore Cylinder assembly, $450.00 and up click for more info or Buy now in our online store	YZ250f big bore / stroker 310cc. Fits 2003 through 2009. Total for the kit: $880.00 click for more info	$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
YZ400F	420cc $500 exchange	Click here for picture and more info yz420			$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
YZ426F	444cc 12.5:1 $500 13.5:1 $525 exchange	Click here for picture and more info yz444			$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
YZ450F Bike		480cc 98mm Big bore $450.00 exchange Click here for picture and more info yz470	Athena 480cc 98.mm This is a brand new aftermarket cylinder. $630.00 or $580.00 if you send us your old cylinder		$50 off when you order any two 4 stroke big bore kits- when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
YFZ450 Quad 2004-2005		470cc Big bore $450.00 exchange	Athena 470cc 98.mm This is a brand new aftermarket cylinder. $670.00 or $620.00 if you send us your old cylinder	NMotion 490cc 100mm bore. Case mod is required. This is a brand new aftermarket cylinder. $950.00 or $900.00 if you send us your old cylinder	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing
YFZ450 Quad 2006		480cc Big bore $450.00 exchange	Athena 480cc 98.mm This is a brand new aftermarket cylinder. $670.00 or $620.00 if you send us your old cylinder	NMotion 500cc 100mm bore. Case mod is required. This is a brand new aftermarket cylinder. $950.00 or $900.00 if you send us your old cylinder	$50 off when you order any two 4 stroke big bore kits - when ordering online their is no option for the discount, but we will deduct the $50 from your order before processing

134cc Big Bore kits for most 125's $600.00 on your cylinder. The kit includes: Boring and replating your cylinder. Cylinder head modified for the big bore piston. Wiseco Pro-lite piston, rings, pin and clips, top-end bearing and a top-end gasket set. The ports get the rough casting flaws removed and finished with a glass beaded finish. Removing casting flaws will gain significant power in midrange and top-end without loosing any low end power. The bigger bore adds power all through the powerband. The glass beaded finish helps prevent fuel/air separation but also allows good air flow.

265cc Big Bore kits for most 250's $600.00 on your cylinder. The kit includes: Boring and replating your cylinder. Cylinder head modified for the big bore piston. Wiseco Pro-lite piston, rings, pin and clips, top-end bearing and a top-end gasket set. The ports get the rough casting flaws removed and finished with a glass beaded finish. Removing casting flaws will gain significant power in midrange and top-end without loosing any low end power. The bigger bore adds power all through the powerband. The glass beaded finish helps prevent fuel/air separation but also allows good air flow.

All 2 stroke fully ported kits big bore kits include: Cylinder bored oversize, ports modified back to stock port timing (port location moves slightly due to boring cylinder oversize)bead blasted and Nikasil plated. Cylinder head modified for the big bore piston. Wiseco Pro-lite piston kit (piston, rings, pin and clips), top-end bearing and a top-end gasket set. The Intake ports and transfer ports get reshaped after the rough casting flaws removed and then finished with a glass beaded finish. Removing casting flaws will gain significant power in midrange and top-end without loosing any low end power. The glass beaded finish helps prevent fuel/air separation in the intakes, but also allows good air flow. Cylinder head chamber gets polished, exhaust ports are enlarged and polished, The Nikasil plating on our re-plated cylinders is a minimum of .004" thick as compared to the stock thickness of .0015"-.002"