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Q. I HAVE A PAIR OF 1979 SUZUKI SPORT TOURING BIKES. I WOULD LIKE TO CHANGE MY FRAME GEOMETRY ON ONE OF THEM. WHAT IS THE FRAME MADE OF AND WHAT WOULD BE THE THINGS I WOULD NEED TO KNOW ABOUT DOING A CUT AND WELD ON THE UPPER FRAME CONNECTION BETWEEN THE REAR SECTION AND THE FRONT SECTION WHERE IT FORMS A Y? I HAVE A MILLERMATIC 120 MIG WELDER. WILL THIS DO THE JOB? WHAT ARE YOUR WIRE AND SHIELD GAS RECOMMENDATIONS? DO I NEED AN INTERNAL FERRULE TO JOIN THE TUBE SECTIONS OR CAN I BUTT JOINT THEM? (Submitted by: RIC KINTZINGER from KAMLOOPS B.C.)
A. Not exactly sure what material the frame is made of. If it's steel, knock yourself out. If it's aluminum or Chrome-moly, your MM-120 isn't going to cut it. Tube splicing should be done where you can slide a small tube inside the two tubes you are splicing together. I also drill a couple of holes in both tubes beyond the seam and plug weld them to the inside splice tube also. Use the 75/25 Argon/Co2 gas and the voltage settings will be dependent on the thickness of the tube. I'm guessing tap 3 and about 55% wire.
A. Not exactly sure what material the frame is made of. If it's steel, knock yourself out. If it's aluminum or Chrome-moly, your MM-120 isn't going to cut it. Tube splicing should be done where you can slide a small tube inside the two tubes you are splicing together. I also drill a couple of holes in both tubes beyond the seam and plug weld them to the inside splice tube also. Use the 75/25 Argon/Co2 gas and the voltage settings will be dependent on the thickness of the tube. I'm guessing tap 3 and about 55% wire.