No Headwork Necessary!

9.5:1   883-1200 Big Bore Cylinder Kit - V-Twin Motor Shop

1200cc XL Sportster Conversion Cylinder and Piston Set includes 2 silver finished cylinders or black wrinkle with milled edge fin cylinders with fitted Wiseco or Sifton moly 9.5:1 reverse dome piston and ring set with base and head gasket included.  Order Rocker Box Gasket Set separately.

Each Kit includes:

• 2 Pre-Fit Cylinders with pistons and matching Hastings Piston Rings
• 2 Head Gaskets
• 2 Base Gaskets
• 9.5:1 Compression

These Big Bore Kits do not require any machining. Choose from chart below.  Prices include FREE SHIPPING*:

PISTON SETS available separately:

No Headwork Necessary!

10:1 883-1200 Big Bore Conversion Cylinder Kit - V-Twin Motor Shop

1200cc XL Sportster Conversion Cylinder and Piston Set includes 2 silver finished cylinders or black wrinkle with milled edge fin cylinders with fitted Wiseco 10:1 piston and ring set with base and head gasket included.

Each kit includes:

• 2 Pre-Fit Cylinders with pistons and matching Hastings Piston Rings
• 2 Head Gaskets
• 2 Base Gaskets
• 10:1 Compression

These Big Bore Kits do not require any machining. Choose from chart below.  Prices include FREE SHIPPING*:

ENGINE CYLINDER FOR EVO SPORTSTER - V-FACTOR

Cylinders can be used for front or rear applications.
Finish honed to standard size.
Includes cylinder stud inserts for head alignment.
Note: Not intended for high performance applications.
Natural finish.
Replaces HD# 16447-88

Part #: M60110 - Fits XL Evolution 1200cc 1988/2003,  Sold Each ... $165.79 including shipping*

PISTON KITS FOR SPORTSTER - Wisco

All Wiseco pistons are forged from hi-silicon aluminum alloy for superior strength and dependability. The unique piston shape allows tight piston to wall clearances for quieter operation. This shape combined with a top quality ring package and computerized machined anti-detonation grooves offers you the most technically advanced piston kits available. Wiseco pistons are available with either Hastings X Style or Wiseco XC Style piston rings.

All piston kits listed are designed to be used with stock stroke flywheels only. Most Wiseco pistons are machined with valve pockets that are deeper and larger than stock. These pockets provide adequate valve clearance for most high lift cams, but as with any high performance upgrade all clearances must be checked.

All 883cc to 1200cc overbore and 84ci Big Bore kits do not require cylinder head modification or flywheel rebalancing unless deemed necessary by the service technician. The 84ci Big Bore kits require Big Bore cylinders and crankcases must be bored to accept the larger cylinders.
Piston Kit, made in the U.S.A.  PRICES INCLUDE FREE SHIPPING*

(+ = how much over stock)

2004-up Dress Kit for Sportster

Customizing kit includes all die cast replacement parts as pictured (cam cover, primary cover, inner and outer rocker box covers and transmission side cover). #VT42-0940 - Fits XL 2004/L ... $1231.56 including free shipping.*

Gasket Kits

Rocker Cover Gasket Kits for Evo include upper and lower gaskets in Cork or Molded O-Ring type with bolt seals and washers for both heads.

PRICES INCLUDE FREE SHIPPING WHEN PURCHASED WITH PISTON KIT. NOT AVAILABLE ALONE ONLINE.  IF YOU WISH TO PURCHASE SEPARATELY, PLEASE CALL 1-866-889-7828;  SHIPPING WILL BE ADDED.

Reverse Pattern Drum Kits
Convert your existing 91-up 5-speed or BAKER XL6 to reverse pattern shifting. Our 1-up, 4-down or 1-up, 5-down shift drum kits give lightning fast upshifts, something racers have known for years. Kits include a drum, billet detent plate, and low effort spring.

P/N 291-6 is a no cost option with purchase of a 201, 202, or 203 XL6 kit; add and "R" to the P/N.
CALL TO ORDER TOLL FREE: 1-866-889-7828, 9-5 CST, M-F.

In addition to 4% more torque to the rear wheel, our pulleys are lighter and stronger than stock. Less weight translates to reduced "flywheel effect" and quicker revs. Weight comparison:

Stock 27 tooth cast iron pulley ... 2.875 lbs

Long life pulley, 26 tooth ... 2.375 lbs

#292-56F - Long Life Pulley, Steel, 26 Tooth ...$142.84 including shipping*

Billet 5-Speed Door
If you are doing any serious performance upgrades to your motor, don't forget about your transmission. Our 6061-T6 trap door is three times stronger than the stock die-cast door in the critical area in-between and around the mainshaft and countershaft door bearings. Our transmission design expertise makes our 5-speed door the best trap door available, period.
Application: 91-up Sportster®/Buell®, P/N 299-5 ...$260.99 including shipping*

CALL TO ORDER TOLL FREE: 1-866-889-7828, 9-5 CST, M-F.

BAKER™ Sportster® 5-Speed Builder's Kits

• BAKER 6061-T6 billet trap door.
• Andrews aircraft alloy gears. Dog teeth have lead-in ramps for smoother shifting.
• BAKER shift drums with conventional shift pattern (1-down, 4-up) or reverse pattern.
• BAKER billet detent plate and low effort spring.

P/N - Description
101 - Stock ratios; see XL6 section of this page
111 - 2.61 1st, stock 2nd-5th, 47 MPH in 1st
121 - 2.37 1st, 1.88 2nd, stock 3rd-5th; 52 MPH in 1st gear, 66 MPH in 2nd
131 - 2.03 1st, 1.67 2nd, 1.36 3rd, 1.16 4th, stock 5th, 61 MPH in 1st, 74 MPH in 2nd, 91 MPH in 3rd, 107 MPH in 4th

Price each: $1,540.50 including shipping*
Speed calculations based on a 3.61 primary/secondary reduction at 6000 RPM
*Add a "R" suffix for reverse pattern drum and detent plate; no cost option.

CALL TO ORDER TOLL FREE: 1-866-889-7828, 9-5 CST, M-F.

More Sporster Specific Items and Links in The Sportster Pages.