We do not offer our 2-stroke kits as shopping cart items because of their custom nature. Please contact us directly by clicking here or calling 608-224-2524.
Mon -Thrusday 8am - 5pm CST.

Max Power Inc. offers the largest selection of big bore kits for motorcycles and ATV's anywhere. Max Power is the home of the Ice Cube cylinder.
Max Power has big bore and stroker kits available for both 2 stroke and 4 stroke engines. We are also your one stop engine performance shop selling stock displacement performance modifications, high compression pistons, Hot Cams, Web Cams, big bore kits, Hot Rods stroker crankshafts, Rossier exhaust systems, Jardine exhaust systems, Leo Vince exhaust systems, Wiseco pistons, CP Pistons and Cometic gaskets.
Max Power Inc. also offers full service cylinder head work including porting and oversize valves from Xceledyne and Kibblewhite. Max Power is one of only 4 companys in the US that has a true in-house cylinder plating facility. Max Power can plate your cylinder with nickel silicon carbide called Apticote 2000, Max Power offers cylinder porting, head modifications, 2 stroke big bore kits, Stroker engines, supermini mods and is the only company that makes the YZ167. 2 Stroke and 4 stroke stroker crankshafts and crankshaft balancing are available too.

CR 105 Big Bore/Stroker

Fits 1998-2007 CR80 and CR85

$1899

Send us your engine and get a 105cc stroker kit installed.

Notes:  This kit requires you to send us your entire engine for modification, with kickstarter and shifter.
Notes:  This is a national level engine package.  The power delivery is designed to build confidence for young riders.  It delivers torque and hook up that are un-paralleled in the industry that carrys to a screaming top end pull.  This kit just makes all riders faster because it is smooth, easy to ride, and does not fall off the pipe like other engines out there. 
Notes:  Prices listed are to install stroker kit parts in good condition engine.  Should your engine need rebuild parts there will be additional charges.  We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)

CR 90 (National Engine) Stroker

Fits 1986-2007 CR80 and CR85

$1570	Send us your engine and get a 90cc stroker kit installed. (CR80 cylinder in good condition)
$1795	Send us your engine and get a 90cc stroker kit installed. (CR85 cylinder-no major damage)
$1275	Spare CR105 top end for later use in supermini classes. (prices vary by year)
$100	Optional Xtreme coated head and piston

Notes:  This kit requires you to send us your entire engine for modification, with kickstarter and shifter.
Notes:  This is a national level engine package.  The power delivery is designed to build confidence for young riders.  It delivers torque and hook up that are un-paralleled in the industry that carrys to a screaming top end pull.  This kit just makes all riders faster because it is smooth, easy to ride, and does not fall off the pipe like other engines out there. 

Notes:  This is the same bottom end as our CR105.  We can also build you a CR105 top end for later use in the supermini classes.
Notes:  Prices listed are to install stroker kit parts in good condition engine.  Should your engine need rebuild parts there will be additional charges.  We will call for approval before we install any parts that will have additional charges. (example: rod kit, mains, main seals, trans parts)

CR 90 Big Bore

Fits 1986-2007 CR80 and CR85

$750	We Modify your top end.
$825	Exchange top end - Call for availability - Additional Charge
$1225	"Bolt On" - Includes Cylinder, head, and power valves  (prices vary by year)
$100	Optional Xtreme coated head and piston

Notes:  This kit requires you to send us your cylinder, head, and powervalves for modification.
Notes:  Core parts subject to inspection before credits will be issued.
Notes:  This is an entry level engine package that has excellent power delivery for CR90 ATV's.  It runs with the best of them no problem and is a good option for racers on a tight budget.

 

CR 98 Big Bore

 Fits 1986-2007 CR80 and CR85

$800	We Modify your top end.
$875	Exchange top end - Call for availability
$1275	"Bolt On" - Includes Cylinder, head, and power valves  (prices vary by year)
$100	Optional Xtreme coated head and piston

Notes:  This kit requires you to send us your cylinder, head, and powervalves for modification.
Notes:  Core parts subject to inspection before credits will be issued.
Notes:  It can be later stroked to 105cc with head mods. 
Notes:  This is an entry level engine package that has excellent power delivery for the supermini classes.  It holds it's own against CR105's and CR112's.