REDLINE V-TWIN PRIMARY CASE OIL RED LINE OIL1-QUARTP/N#42904 For 1984-to-present V-Twin American motorcycle engines, including Evolution, Twin Cam, and aftermarket engines of similar designSame fluid as our famous MTL gear oilImproves clutch operation while reducing wear and temperatureWhere most synthetics are too slippery for clutch operation, this friction-balanced product is balanced to provide less slip, smoother operation, and helps to apply more power in modified enginesThis product is for use in the primary chaincase with wet-diaphragm spring clutches. ABOUT RED LINE MOTORCYCLES, ATVS, AND POWERSPORTSMotor oils and gear oils are specifically engineered for the latest high-revving four-stroke motocross bikes and ATVs, Sportbikes, and V-TwinsEach gear oil product reduces the thinning effect from high temperaturesMotor oils are packed with higher levels of anti-wear chemistry like zinc and phosphorus Special friction modifiers in our motor oils better wet-clutch operation A variety of Two-Stroke oils to meet the NMMA TC-W3 regulations where required Actual shipping charges and combined shipping. Canada & International shipping Extra.And additional time maybe needed to ship. Accepting Paypal. All sales final, as is race item.