As i am a welder i can tell you that is not the weld that is cracked. It's the parent metal ie the frame, as i do QC as well i was interested to see one day what our bike frames and parts are made of using a very expensive tool that i cannot remember the name of right now. Anyways what came up on the display was inconclusive, which basically means it's just shit metal. Where the cracks seem to be forming are around the heat effected zones which basically means two IMO....
1. What ever weld procedure was made for the factory welding is wrong, too much heat is being inputed into the frames hence the cracking.
2. The metals used for the constructions of our frames and parts are absolute gob shite.
Just remember bikes are pretty cheap to buy and when mass produced materials aren't going to be top quality..
Last note..if it was the actual weld that was cracking you would see a crack right down the middle of the weld.
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"Do not base your existence on this earth by how much REP you have!"
My Previous Rides
1988 Yamaha DT 50 - First street legal bike
1998 Kawi ZX6R - Track
2004 GSXR 750 - RIP she was not an ambi turner.
2005 Yamaha R6 - Sold
2006 GSXR 750 - Sold
2005 (current) Kawi ZX10R (Green) - Now turning into a street fighter
2005 (Current) Kawi ZX10R (Red)