TBH I think you're worried about the wrong bit, the seat mount is nothing, just somewhere to attach the seat pad. The real issue is those little bits of metal between the tubes - they will limit/prevent the upper and lower tubes from flexing independently somewhat - which will lead to stress fractures further back. Besides, this little subframe takes all the force of your body when you're doing a Marquez. Take it to an adult with a welding machine and grovel a lot.
To me, that bit looks like what will take most of the weight. It sits in the middle of the seat either side. If I removed both sides nothing would hold the tank up. Possibly.
Ah is your subframe steel then? Honestly mate those poxy little screws just locate the seat base. it's the subframe that takes the weight and stress, plus the silencer (hanging right out the back) weighs a ton and stresses the subframe massively, that's before you put yourself on it and jump around like Marc 93.
Right. Yes you definitely need the bit you've just hacked off. If you've made a nice neat cut through the seat mounting plate with a thin cutting disc. You could recover it. But if you've made a couple of ham fisted crossed cuts the finished repair could look pretty ropey. Your first move should be to stop. And take a few moments to assess how bad it is and make a reasonable decision what to do next. Without the emotion of what a dick you've been! Which is bolt, your seat to the remains of the subframe. Then bolt the detached bracket to the seat to use it as a jig to position the seat mount. Have a look how big the gap between the two parts is. If it's a canyon the weld will pull and distort the bracket. Then find a welder with a sense of humour and tell him what you've done, It'll help.
Right, ever the fecking optimist, might get away with this , just need a welder with GSoH! Obviously, out of all the welds I could of cleaned up, the only one I have is one of the 2 I need.
heh! ooops! take beer. Most welders like beer. (but don't let them have until they have fixed it). Look on the bright side, last time I went to a welder, I met a professional tuba player and learned something interesting about Dvorjak
Now with welder. "no worries, you have no idea how often people do this." Tip top! Lesson learned AND i've found a local welder!
Gotta give it to ya CR you're certainly brave enough to give it all a go with your bike and smart enough to consult with a bunch of internet strangers, who also have no idea, on what to do next when you've got doubts. Good on you CR. Bloody entertaining, please keep breaking shit
the tube is thin wall hi-tensile, (maybe like renolds) or cold worked seamed tube, if you have ground a flat and reduced the wall section, you cant weld anything on to the thinner wall and expect, the frame to still work mechanically, always leave the tube sections alone but try to engage at least two sides of the tube for welding brackets on? your repair/mod looks good, try to use the least heat, consistent with a good weld not to ruin the properties of the tube. looks like you did a good job to me?
