Mikuni HSR 42mm Carburetor Kit for Harley Big Twin Evolution 1990-Later MSRP: $687.98 Sale price $429.99 When it comes to fuel induction systems Mikuni has taken the scientific approach towards making more power. Some aftermarket carburetors use butterfly throttle valves which obstruct the... Qty in Cart: 0 Quantity ( in cart): Decrease Quantity: Increase Quantity: Price: MSRP: $687.98 Sale price $429.99 Subtotal: Add to Cart