CYLINDER SLEEVE FOR SKI DOO SNOWMOBILE ENGINE ALPINE 640 (635cc) TWIN 1972-78. THIS SLEEVE FEATURES 3.235" OUTSIDE DIAMETER. CHECK YOURS BEFORE PURCHASE.

This Replacement Cylinder Sleeve is manufactured by L.A Sleeve. This is a replacement sleeve with the ports CNC machined to exacting tolerances to match the original sleeve. IMPORTANT: The Inside Diameter of the sleeve is Semi- Finished and must me bored and honed after installation.

A qualified machine shop is required to remove the old sleeve from the cylinder, Measure the O.D., re-install the new sleeve, match and chamfer the ports, then bore and hone the new sleeve to fit the piston.

Reference Help: Sleeve Outside Diameter 3.235",  Top Flange Outside Diameter: 3.535", Overall Sleeve length: 5.340"

Fits Models: SKI DOO ROTAX Engine Alpine 640 Twin 1972-78

IMPORTANT: Before Ordering - Check your models and years.   Have a qualified machine shop or cylinder tech inspect your cylinders, crankshaft, rods, etc.

Picture is for reference and is  the actual sleeve. You will receive this sleeve when purchasing.  Order quantity required. Combined shipping will be applied for quantity orders.   Re-stock fee applies.