Chrome Cylinder Guide Bar Nut (Pk/2) Fits: into Front/center of cylinder casting on All 650's 1970-84.

Chrome Cylinder Guide Bar Bolt (Pk/2). Bolt Passes thru cylinder guide bar nuts located at Front/center of cylinder casting and secures cam chain guide bar to cylinder casting (inside cam chain tunnel). Fits: All 650's 1970-84

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.

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

Stock 650cc Cylinder Sleeve. Replaces damaged or worn out original sleeve so engine can go back to stock piston size (approx. 74.94MM. or 2.95" ) or any of it's oversizes. ID, OD, length and thickness dimensions are the same as original. Fits: All 1970-84 stock cylinder blocks. Note: After installation of sleeve into your cylinder, sleeve must be sized (bored/honed) to accept the pistons you are using. This operation should be performed by a competent professional machine shop.

Piston Ring Set - Stock/Standard Size (for 1 piston) Fits: TX/XS650's 74-84 (447 & 533 type engines - 1974-84). OEM Ref.# 447-11610-00-00 Quality Made in Japan on all new tooling. Note: 447 type Rings interchange with European 533 Rings but pistons do not. 447 rings do not interchange with original 256 rings used on 1970-73 models. If you want to go back to a stock 650cc piston, this is the ring set you will need. If you want to replace rings on an original stock size piston this is what you need.

Big Bore (80mm) Piston Kit - for 750 Big Bore Engine Kit for Yamaha XS650's

Big Fin Cylinder Block Fitted to Standard Size 650cc. Original type pistons. Includes Cylinder Block, fitted Stock type cast pistons, piston pins, clips, Head and base gasket and matching piston ring sets. Kit Fits: 1974-84 447 XS/TX 650 Engines. Start over at the original stock 650cc. bore size with the improved cooling and good looks of our Big Fin cylinder.

Piston Ring Set (3) First Oversize 0.25 OEM Ref # 1J7-11610-11

TC Bros. Yamaha XS650 Engine Rebuild Stand. Make your engine rebuild a lot easier with this engine stand. Very rigid and easily secured to your work bench using 1/4in holes found in base of stand. Powder coated gloss black for a durable finish. Fits all years of XS650 motors. Made in USA. Assembled dimensions are 10.25in W x 13.5in L x 11in H.