1986-2003 SPORTSTER Engine Kits


AN INDUSTRY STANDARD: THE NRHS BOLT-ON 1250 KIT FOR EVOLUTION SPORTSTERS

 

 

We’ve sold literally thousands of these kits since their introduction in 2001. Why do they sell so well? BECAUSE THEY WORK! Customers report huge increases in torque and horsepower, as well as longevity and reliability and without the expense and down-time of other big bore kits because no case boring is required for installation! And now we're proud to offer this kit with premium quality NRHS iron lined aluminum cylinders. Our testing has shown superb ring seal, power, and longevity with each of these kits. Each of these kits also includes top quality NRHS Hurricane forged pistons and tool steel wrist pins, Total Seal rings, and Cometic EST gaskets. Give your Sportster the BEST parts money can buy: the bolt-on big bore kit from the inventor of the 1250 kit, NRHS! Kits are available for XL1200, XL1200S, Thunderstorm, and XB/'04 XL1200R heads.

 

Ordering Information

 

 

 

1250 Kits With NRHS Iron Lined Aluminum Cylinders (shown above)

Iron Lined Aluminum construction offers greater structural integrity with good heat dissipation and excellent ring seal.

 

Description

Black w/ Highlighted Fins

Black

Silver

1250cc Bolt-on kit for XLH1200 Heads

3.563" bore iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

head and base gaskets

also for 1995-1996 Buell S2/S2T models

004-NAIL3563XLK-BH

$599.95

004-NAIL3563XLK-B

$599.95

004-NAIL3563XLK-S

$599.95

1250cc Bolt-on kit for XL1200S Heads

3.563" bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563XLSK-BH

$599.95

004-NAIL3563XLSK-B

$599.95

004-NAIL3563XLSK-S

$599.95

1250cc Bolt-on Kit for Thunderstorm Heads

3.563" bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563TSK-BH

$599.95

004-NAIL3563TSK-B

$599.95

004-NAIL3563TSK-S

$599.95

1250cc Bolt-on kit for XB/2004 XL1200 Heads

3.563" bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563XB12SK-BH

$599.95

004-NAIL3563XB12SK-B

$599.95

004-NAIL3563XB12SK-S

$599.95

 

Options to Make These Kits Even Better!

 

If your bike is over 2 years old or has more than 4,000 miles, you should consider upgrading to a full Cometic top end gasket kit. These kits include all rocker box, head, base, pushrod, intake and exhaust gaskets.

 

If you would like NRHS to gap your rings and pre-install your assembled pistons into pre-lubed cylinders you can also order that below. ***See special price***

 

Ordering Information

 

NOTE: GASKET KIT UPGRADE IS ONLY AVAILABLE WITH 1250 CONVERSION KIT PURCHASE!

 

 

Description Part Number Price  

Top End Gasket Kit Upgrade

 

1986-1990 XL's

88-C9907-U

$50.00

Top End Gasket Kit Upgrade

 

1991-2003 XL's

88-C9854F-U

$50.00

Ring gap and pre-install pistons

***Regular price $50, Special price $1.00***

116-007

$1.00

 

 

 

 

NRHS 1250 PACKAGE WITH MATCHING CAMSHAFTS

 

Want even more power? NRHS has packages that include both the NRHS 1250 kit, gasket kit and matching camshafts that are proven on the dyno and on the street to work exceptionally well together. Buying a matched package takes the guesswork and error out of your project!

 

Description

Black w/Highlighted Fins

          Black

Silver

NRHS 1250cc package: XLH1200 Heads

3.563" bore iron lined aluminum cylinders

CP 10.5:1 pistons, pins, clips, rings

Andrews N4 Camshafts

Cometic Top end gasket kit

Ring gapping

also for 1995-1996 Buell S2/S2T models

004-NAIL3563XLPKG-BH

$950.00

004-NAIL3563XLPKG-B

$950.00

004-NAIL3563XLPKG-S

$950.00

NRHS 1250cc package: XL 1200S Heads

3.563" bore iron lined aluminum cylinders

CP 10.5:1 pistons, pins, clips, rings

Andrews N4 Camshafts

Cometic Top end gasket kit

Ring gapping

004-NAIL3563XLSPKG-BH

$950.00

004-NAIL3563XLSPKG-B

$950.00

004-NAIL3563XLSPKG-S

$950.00

NRHS 1250cc package: Thunderstorm Heads

3.563" bore iron lined aluminum cylinders

CP 10.5:1 pistons, pins, clips, rings

Andrews N4 Camshafts

Cometic Top end gasket kit

Ring gapping

004-NAIL3563TSPKG-BH

$950.00

004-NAIL3563TSPKG-B

$950.00

004-NAIL3563TSPKG-S

$950.00

NRHS 1250cc package: XB/2004 XL 1200 Heads

3.563" bore iron lined aluminum cylinders

CP 10.5:1 pistons, pins, clips, rings

NRHS Cat 3 Camshafts

Cometic Top end gasket kit

Ring gapping

004-NAIL3563XBPKG-BH

$950.00

004-NAIL3563XBPKG-B

$950.00

004-NAIL3563XBPKG-S

$950.00

 

 

Not seeing what you want? Give us a call at 573-759-2834! We have tremendous experience at hot-rodding and racing XL's and we'll be happy to put together a package that works for you.

 

 


FOR THE ULTIMATE POWER FROM YOUR SPORTSTER: THE NRHS 88" and 90" KITS FOR EVOLUTION SPORTSTERS!

 

This kit is not for the faint of heart! Your Sportster will surprise and amaze you with the torque and horsepower these kits produce. Power is right there for the taking, it comes on early and often. Tuned properly, the engine’s reliability and longevity is actually enhanced in the process due to the premium quality  Axtell aluminum cylinders with cast iron sleeves or all cast iron,  NRHS Hurricane forged pistons and tool steel wrist pins, Total Seal rings, and Cometic EST gaskets found in this kit. You can’t buy a better kit for your Sportster, anywhere at any price! Note: This kit requires the engine to be disassembled and the cases to be bored

 

88ci Kits With Axtell Iron Lined Aluminum Cylinders

For those who want light weight, good heat dissipation, and and more structural integrity we now offer 88" Axtell cylinders in iron lined aluminum construction  These cylinders are built to last with heavy duty ribs in the cooling fin areas. Other powder coat colors available, please call for details.

 

 

 

 

 

Description

 

88ci Big Bore Kit for Thunderstorm Heads

Silver

3.813" bore Axtell iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

head and base gaskets

(case boring required)

004-NR3813CITSK-SH

$1220.00

88ci Big Bore Kit for Thunderstorm Heads

Black Highlighted

3.813" bore Axtell iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

head and base gaskets

(case boring required)

004-NR3813CITSK-BH

$1220.00

88ci Big Bore Kit for XB/2004 XL1200 Heads

Silver

3.813" bore Axtell iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

head and base gaskets

(case boring required)

004-NR3813CIXB12S-SH

$1220.00

88ci Big Bore Kit for XB/2004 XL1200 Heads

Black Highlighted

3.813" bore Axtell iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

head and base gaskets

(case boring required)

004-NR3813CIXB12S-BH

$1220.00

 

 

 

90" Kits With Axtell Cast Iron Cylinders (shown above)

Cast iron construction offers the ultimate in structural integrity and ring seal. Cylinders come only in black baked finish. Fin highlighting is not available. Powder coating is available for an additional $100.00. Note: This kit requires the engine to be disassembled and the cases to be bored

 

Description

Black

90"Kit for Thunderstorm Heads

3.875" bore Axtell cast iron cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NACI3875TSK-B

$940.00

90" Kit for XB/2004 XL1200 Heads

3.875" bore Axtell cast iron cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NACI3875XB12SK-B

$940.00