Why the change - a way for Yam to save a few pennies on parts perhaps?
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B model rear wheel removal
- Thread starter AlanW
- Start date
More than likely Raymond. Not sure what came first, but the new style shortened mufflers allow the axle removal without being removed... so the block on the swingarm became redundant.
Same year? Or did they figure out they could save money on the swingarm after the new muffies?
My 80SG has the solid swingarm. Another one I had also had the solid swingarm.
So either they were emptying out last years parts bins on mine or a PO swapped it I guess. 
Nothing is set in stone. Did Yamaha put some on the SG's, possibly. Just like the production dates in relation to models.
So I’m re-installing the rear wheel on the ‘75 and the chain adjusters are different for left and right. One (left?) has a smaller diameter hole on the outside plate and won’t fit over the rear axle past the thread. The other one (right?) slides all the way on. So I can be sure I have the correct adjusters, can someone please confirm that this Is how they are supposed to be? I appreciate that they are different part numbers for left and right so assume this is by design? Thanks.
That’s great - thanks again!!
All back together, new chain and sprockets on. Wheel ran free. Set the chain tension and tightened up rear axle nut, wheel “stiffened up”. I have new brake shoes fitted but wouldn’t expect any friction until brake applied. So what is going on?. Everything that came off is back on so it will all come apart tomorrow morning to recheck all components. Pain in the ass!!
I would guess, one peice mold to weld on instead of 3 parts. less time for assembly as well. Europe and japan had Standard models till 80/81 and some sold in 82. I assume they still used the standard style swing-arms with removable blocks. The US got the bulk of Specials, savings add up or keep the price down.
One possibility; The washer on the brake shoe pivot shaft will only fit one way. backwards it takes up "too much" room and will bind.
Did you change wheel bearings? Part #20 often forgotten in the old bearing.
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No haven’t changed the bearings. Only delta is the new brake shoes. I took it all apart and reinstalled this morning still binding when I tighten things up. I’ll do it all again and recheck brakes etc.. . Thanks for the feedback.
that's right.
Just a maybe;
I've run into poorly machined shoes.
Made a cutter.
Just for reference
I’ve become an expert, thanks to all the help on here
on removing and installing the back wheel!! So, new day tomorrow. Remove, re-examine everything. The only things changed are the new shoes and correct adjusters. Gonna put the old shoes back on and see what happens. The fact that the wheel spins freely without tightening the nut to the correct torque is obviously a worry. Watch this space. Might get new bearings put in just to rule everything out?? 
on removing and installing the back wheel!! So, new day tomorrow. Remove, re-examine everything. The only things changed are the new shoes and correct adjusters. Gonna put the old shoes back on and see what happens. The fact that the wheel spins freely without tightening the nut to the correct torque is obviously a worry. Watch this space. Might get new bearings put in just to rule everything out?? 
Try to resolve the first problem before adding another variable.
Good advice! Once again this group comes to my aid! First thing I’ll try tomorrow.
So after following advice I removed brake shoes and reassembled. Free as a bird. Took a look at the shoes - they are brand new from Yambits UK and the friction material was slightly proud of the metal along the sides. Took a Dremel to them and removed excess. put it all back together this morning for the umpteenth time and it’s all good. You’ve probably realised I’m not that mechanically minded but I got there in the end. Will be test riding with new chain, sprockets and tyres asap. Thank you to everyone for their help - much appreciated.Good advice! Once again this group comes to my aid! First thing I’ll try tomorrow.
Happy endings are the best!
