![]() The screws are JIS Cross Recessed they are NOT phillips screws. There are no phillips screws on a Japanese motorcycle, none! If you use a phillips screwdriver it will cam out and damage the screw. Trying to force it out can damage the butterfly and the carburettor throat. Once the screws are removed the butterfly can be very carefully removed. If the butterfly screws are tight, usually because they have been staked, then first, seal the carburettor to ensure that no grit can fall into the throat, and use a Dremel or similar tool to grind away the staked section of the screw. Do not use the butterfly as a stop when loosening the nuts on the end of the shaft. Because they have a long slot to hold the butterfly, they can be easily twisted or bent. Removal of the throttle shafts needs to be done with great care. Most of them will show all of the internal jets and parts, but very little of the external fittings that are between the carbs, such as springs and throttle shafts. Note that most parts books and manuals do not show the details of the parts and assembly of the carburettors when they are separated. When disassembling your carbs, take as many photos as necessary. ![]() However, it could be useful for other models that use these carburettors. ![]() This guide is for a set of Mikuni BDST carburettors from a Yamaha FZR400RR 3TJ1.
0 Comments
Leave a Reply. |