Welding a hoop onto an rd
- Thread starter ty.man
- Start date
AlphaDogChoppers
Science is true whether you believe in it or not.
teazer said:
The rear frame loop adds a lot of torsional rigidity to the back of the frame, IMO. I don't think it's non-functional. I see it as the same sort of thing as a fork brace.
Stock Yamaha frames come with all the metal they need was my point. The other reference to non-functional loops is because so many are in the wrong place and are not suitable for mounting seat or fender or lights or plate from.
The loop on this one is shaped much like a TD3 or TZ seat loop and is much better than the average loop, from what we can see of it. It is angled upwards under the seat where it is out of the way of the tire. I could have done a better job of differentiating between teh issues.
The loop on this one is shaped much like a TD3 or TZ seat loop and is much better than the average loop, from what we can see of it. It is angled upwards under the seat where it is out of the way of the tire. I could have done a better job of differentiating between teh issues.
Ty.man,
Check out teh rear end of a Yamaha TD3 frame. It may surprise you how similar yours will be to that. Don't add any more sheet steel that you absolutely must to complete a structure. I keep seeing people use 1/4 steel plate to reinforce frame. I typically use sheet less than 1/2 of that thickness and it's still too thick.
That's a TD3 or early twin shock TZ250
Later monoshocks have even less frame at the rear end, but that's a whole other story.
On this Dutch TD replica, the builder fitted a vertical loop between two short frame tube extensions
On this pair of twin shock TZs that we had in the shop for ground up resto a few years ago, you can see the way that the loops disappear up inside the seats.
Check out teh rear end of a Yamaha TD3 frame. It may surprise you how similar yours will be to that. Don't add any more sheet steel that you absolutely must to complete a structure. I keep seeing people use 1/4 steel plate to reinforce frame. I typically use sheet less than 1/2 of that thickness and it's still too thick.
That's a TD3 or early twin shock TZ250
Later monoshocks have even less frame at the rear end, but that's a whole other story.
On this Dutch TD replica, the builder fitted a vertical loop between two short frame tube extensions
On this pair of twin shock TZs that we had in the shop for ground up resto a few years ago, you can see the way that the loops disappear up inside the seats.
Aw schucks. Both bikes long gone. One was a client's and the other I built from a pile of bits. The wheels are gorgeous on those bikes but so heavy and the fronts are 1.60" wide WM1 for heavens sake. What were they thinking.
Probably the longest job on that black one was rebuilding the whole rear end of the exhaust system and fabricating those anti vibration brackets and springs and stingers etc. Looked nice when it was done though.
Probably the longest job on that black one was rebuilding the whole rear end of the exhaust system and fabricating those anti vibration brackets and springs and stingers etc. Looked nice when it was done though.
piranhasattack
New Member
Great looking work teazer! (from what I saw) 
