Mikuni Bsr42 Manual

For TC88 engines, HSR42/45/48 carbs and Mikuni filter. Includes improved chrome banjos, vent bolts and brackets. Jet Kit for HSR42: KHS-025: Contains 44 pieces in a special jet box. Included are 2 each 150 thru 170 main jets, 2 each 20 thru 32.5 pilot jets, 1 each -96, -97 and -98 needles, 2 each #60 a/p nozzles, needle clips,washers and O-rings.

The Mikuni BS32SS carburetor had a 1.3-inch bore size, with a standard idle rpm of 1,150, plus or minus 100 rpm. The fuel level measured at 0.2 inch, plus or minus 0.02 inch, and the float height measured 0.88 inch, plus or minus 0.04 inches.

The main air jet measured 1.7 millimeters. The by-pass measured 0.8 millimeter and the pilot outlet measured 0.7 millimeter. The valve seat measured 2 millimeters. Free midi reggae drum patterns.

The recommended cable play for both the throttle cable and choke cable measured 0.5 to 1 millimeter, or 0.02 to 0.04 inches. The Mikuni carburetor was designed to meet the 1980 United States Federal Emission Regulations. Any motorcycle having over 50 cubic centimeters of engine displacement was required to adhere to this emissions level.

This called for a hydrocarbon level no greater than 8 grams per mile and a carbon monoxide level no greater than 19.3 grams per mile. The main jet, needle jet and pilot jet were all components specifically calibrated to allow the Mikuni BS32SS to meet the required emission level requirements. According to Suzuki, if the air cleaner fails in the Mikuni BS32SS carburetor, it could be due to the presence of dirt or excess oil lubrication. A faulty fuel level in the carburetor could be caused by a sticking float, a leaking needle or an incorrect carburetor setting. A leaking or sticking linkage could cause the choke to malfunction. Clogged or restricted carburetor jets, a too lean or too rich float level, leaking choke plunger or sticking linkage, or air leaks in the intake manifolds or engine gaskets could all cause mixture malfunctions in the carburetion system.