Polished Chrome Crown Nuts (pk./10) - 8mm. x M1.25 thread.

Polished Chrome Crown Nuts (pk./10) Short type - 10mm. x M1.25 thread x 16mm. high (17mm. hex)

XS Performance 1st. Oversize (81mm) Forged Big Bore Piston Kit. Piston includes ring set for 1 piston, piston pin(1) and pin clips(2). Forged Piston features: 1. - Valve pockets cut for large valves. 2. - Mos2 treated piston skirts. 3. - Oil channel for enhanced wrist pin oiling. 4. - 20mm. piston pins that are internally tapered to ends for weight reduction. 5. - Lightweight 9:1 piston assembly weight of approx. 340 Grams. Fits to - 1974-84 - 447 type engines with Big Bore (750cc.) cylinders.

Replacement piston Ring Set to fit XS Performance 81mm. Pistons (XS#05-0753) Set = Rings for one 81mm. (1st. over) piston.

Replacement piston Ring Set to fit XS Performance 80mm. Pistons. Set = Rings for one 750cc. XS Performance 80mm. (Standard size) Piston.

Piston Pin for our XS Performance forged Big Bore 750cc Pistons. 20mm. piston pin is internally tapered to ends to reduce weight. Fits: 1974-84 447/533 XS Performance 80-81mm. Forged pistons.

Piston Pin Clips (Pr.) to fit our Big Bore (750cc) forged pistons and Big Bore Kits. 20mm. size for 447/533 (1974-84) type engines only.

Replacement Rubber Cap for Starter Motor Power Cable Terminal. Fits: All 650's 1972-84

Fork Tubes Set/2 - Replace those worn or damaged stock fork tubes with our new fork tubes and restore your front end to proper appearance and function. Replaces OEM #'s: 2F0-23110-00, 1T3-23124-50, 1G3-23124-50. Standard Length 35mm. Fork Tubes fit All 1977-84 650's.

Extended Fork Tube Set/2 (+ 2" over stock length). 35mm. OD Fork Tubes to fit All 1977-84 650's.

Extended Fork Tube Set/2 (+ 4" over stock length). 35mm. OD Fork Tubes to fit All 1977-84 650's .

ALL NEW PARTS! The ultimate complete bolt on Big Bore 750cc Cylinder and piston kit made for the XS650 Yamaha. Kit Fits: 1974-84 447 Type Engines NOT COMPATIBLE WITH EUROPEAN 533 OR EARLY MODEL 256 ENGINES Modified limited production European Race Engine Cylinder Block has enlarged fins for improved cooling. The New Cylinder Block has longer fins matching the Head Fin Length. Kit Includes: One of our XS Performance Big Bore Race Cylinder Block with sleeves installed and finished to fit our 80mm. Forged Big Bore (750cc.) Pistons. Cylinder casting has larger cooling fins that extend out the same distance as the cylinder head fins for enhanced cooling. No modifications to engine cases needed. Two 80mm, 750cc Big Bore Piston kits complete with Ring Sets, Piston Pins & Clips. Precision machined 447 type Pistons feature: Valve pockets cut for large valves. Oil channel for enhanced piston pin oiling. 20mm. piston pins that are internally tapered to ends for weight reduction. 9:1 compression pistons. Fitted with our XS Performance Camshaft, Carbs, a free flowing Exhaust and Iridium spark plugs will result in about 65 Rear wheel Horsepower or more and 50 foot pounds of Torque.

Dowel Pins for Cylinder Head or Base - 14mm. OD x 16mm. Long. Fits: All 650's 1970-84

Replica of original stock Seat. Steel seat pan, mounting hardware (hinges, hook for seat latch and seat prop assembly) included. Accepts passenger grab rail (Not included). Seat is OEM Ref. # 306-24730-01 type. Fits: XS1/XS1b/XS2/TX650 1970-73

Seat Hinge Set (2) with mounting Bolts (4pc.) Fits: XS1/XS1b/XS2/TX650 1970-73 stock seats.