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Does anyone know how to do measurements and what the values should be on a 1974 TX650A to determine if the cylinders or heads have had any milling done to them. I am thinking the cylinder sleeves would need to be measured but I don't know their stock length. Or what the distance between the...

I need a side stand for a 1974 TX650A or a 1975 XS650B. Must match diagram.

I need a side stand for a 1974 TX650A. It must be the same as the one in the diagram. One which accepts the rubber stopper. It seems to be the only one which works for my bike. I have one which is part No. 447-27311-06 but it's not sitting flat. I believe I need part No. 341-27311-01-00

I've installed a Boyer Bransden Micro Power Ignition on my 1974 TX650A. It was easy to follow the instructions and align the mark on the crank rotor to the unlabelled full advance mark on the stator and then align and set the white dots on the magnetic rotor to the holes on the stator plate...

I recently restored my 1974 TX650A and was riding it using the stock ignition system and was using a new AGM battery from Mike's XS and I had converted the charging system using an ElectroSport solid state voltage regulator and rectifier. The bike was running quite well with no problems keeping...

I need to know what the air line connections go to on a pair of Mikuni BS38 carburetors. I'm wondering if they bridge to each other or should they be capped? I've included an attached photo indicating which connectors I have in question.

I'm rebuilding two 1974 BS38 carburetors and would like an opinion about correct float level. I have adjusted the floats by setting their height to 24mm while the carburetor was inverted and the tab was in contact with the needle valve and the only pressure on the valve was by the weight of the...

I'm rebuilding a 1974 TX650A and I'm fairly certain I have a Mikuni BS38 Model 447A1 which uses the Z6 short needle jet (which is the same as the Z8 needle jet.) There is no up ramp in the carburetor throat. Uses a 4N8 jet needle and a standard 127.5 main jet and No. 45 pilot jet. I bought...

Does anyone know why these particular locations use cap nuts with sealing washers? The crankcase studs are all sealed with yamabond at the mating surfaces of the crankcase halves and shouldn't leak. I can understand using cap bolts to protect the threaded end of the studs on the bottom side of...

I'm reassembling a 1974 TX650A and have a part that I can't remember where it came from. Can anybody identify it and tell me where it goes?

I can't find the part number for the grommet that routes the alternator wiring through the engine case. Does anyone have it's number or know where to buy it?