1986-2003 SPORTSTER Engine Kits


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

 

 

Weíve 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

Silver

1250cc Bolt-on kit for XLH1200 Heads

3-9/16 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

$699.95

004-NAIL3563XLK-S

$699.95

1250cc Bolt-on kit for XL1200S Heads

3-9/16 bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563XLSK-BH

$699.95

004-NAIL3563XLSK-S

$699.95

1250cc Bolt-on Kit for Thunderstorm Heads

3-9/16 bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563TSK-BH

$699.95

004-NAIL3563TSK-S

$699.95

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

3-9/16 bore iron lined aluminum cylinders

10.5:1 dome pistons, pins, clips, rings

head & base gaskets

004-NAIL3563XB12SK-BH

$699.95

004-NAIL3563XB12SK-S

$699.95

 

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 $75.00, Special price $1.00***

116-007

$1.00

***Regular price $75.00, Special price $1.00***

 

 

Performance tip: Although the XB/'04 XL1200 head is a better piece, Thunderstorm type pistons use a superior 15 degree angled squish band arrangement. For the optimum in performance, let NRHS cut a 15 degree squish band into your XB/'04 XL1200 heads and use a Thunderstorm engine kit.

 

An NRHS/Axtell 1250 kit and Stage 2 XL1200R heads shown installed

on a Buell S2 owned by Sam Matteo

 

Right side


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 engineís 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 canít 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

3-13/16 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

3-13/16 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

3-13/16 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

3-13/16 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

$890.00

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

$890.00

 

Performance tip: Although the XB/'04 XL1200 head is a better piece, Thunderstorm type pistons use an angled squish band that improves chamber efficiency over the flat bathtub style used in the XB heads. For the optimum in performance, let NRHS cut a 15 degree squish band into your XB/'04 XL1200 heads and match this up to a Thunderstorm engine kit.

 

GET A COMPLETE MATCHED PACKAGE WITH AN NRHS STAGE 1/2/3 POWER KIT!

From $1100.00!

Donít mess around with poorly matched components, get a matched combination from NRHS! Listed below are some of our most popular packages, proven on the dyno and on the street. Or give NRHS a call and let us put together something made just for you that we know works.

 

Description

All Black or Black w/  Highlighted Fins

Silver

Stage 1 engine kit, 1250cc

3.563 bore NRHS iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

Stage 1 head prep (send us your stock heads)

Complete Top End Gasket Set

005-NR3515TSS1EKH

$1250.00

Stage 2 light engine kit, 1250cc

3-9/16 bore NRHS iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

Stage 2 light head prep (send us your stock heads)

Complete Top End Gasket Set

Matching Street Performance Camshafts

005-NA3563TSS2EKH-H

$1815.00

005-NA3563TSS2EKH

$1815.00

Stage 2 std engine kit, 1250cc

3-9/16 bore NRHS iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

Stage 2 std head prep (send us your stock heads)

Complete Top End Gasket Set

Matching Street Performance Camshafts

005-NA3563TSS3EKH-H

$1865.00

005-NA3563TSS3EKH

$1865.00

Stage 3 engine kit, 1250cc

3-9/16 bore NRHS iron lined aluminum cylinders

10.5:1 pistons, pins, clips, rings

Stage 3 head prep (send us your stock heads)

Complete Top End Gasket Set

Matching Street Performance Camshafts

005-NA3563TSS3EKH-SH

$2015.00

005-NA3563TSS3EKH-S

$2015.00