Triumphrat

faffi

I can get some 1993 Daytona 900 parts in order to upgrade the 'Bird's chassis and wondered if anybody else has done the same and if they ran into any challenges. The questions I specifically have are:

- can I bolt on the shock and linkages from the Daytona onto the Bird's swingarm without mods?
- will the Daytona rear wheel fit in the Bird's swing arm?
- can I fit the complete front end, including the triple clamp, wheel and brakes from the Daytona without mods to the Bird? I'm aware that I will have to use clip-ons or modify the top triple clamp when I fit a Daytona front end.
- will the front fender from the Bird fit the Daytona forks?
- anything else I need to be aware of?

denny

I don't know
Yes, It's been done several times
Yes, for simplicity, I'd probably keep the TBird Triple Clamps.
Not a bolt on
Read through Pictures of heavily modified Classic Triples thread

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Cheers,Denny

faffi

Thank you, will do

faffi

Been there, done that, as they say

Couldn't find anybody who had changed to a linkage type rear suspension, though. Considering all the other modifications people have done, one would imagine at least somebody wanted the benefits that comes with the progressive action offered by the linkage style.

Anybody?

MickMaguire

No the linkage etc are different - of course you could probably engineer a solution but its not worth it - go for an aftermarket such as a penske or Ohlins, or for a more budget job go for a TBS or Kawasaki ZX unit
As said - yes - but you can't use the Tbird brakes you would need to replace with brakes from a Trophy or go for a custom rear rotor
not without modification as the mount points are different

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Mick...

Just remember; an awful lot of the free advice you will get on forums is worth exactly what you paid for it. There will always be somebody trying to convince you to do something really stupid, just because they did it or want to do it.

denny

I've heard of one guy who used a Sprint Swingarm on his TBird.
I assume he had to use the Sprint suspension components also.

So if you are getting a complete salvage bike to start with that's a possibility to consider.

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Cheers,Denny

faffi

Great info from you both - thank you

By the sound of things, I would be best off fitting the whole rear end from the Daytona; swingarm, linkage, shock, wheel and brake. Since I have access to that, it seems like the logical solution. Unless it means fabbing a completely new upper mount for the shock?

MickMaguire

Denny has a good point so long as you get all the linkage etc you could swap to the Daytona shock - it may even work with the Tbird swing arm but it also may not - not tried it myself

Unfortunately the daytona rear brake will not work with the Tbird main frame - you dont have the forward mounts for the underslung torque arm - you'd still have to go the Trophy route.

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Mick...

Just remember; an awful lot of the free advice you will get on forums is worth exactly what you paid for it. There will always be somebody trying to convince you to do something really stupid, just because they did it or want to do it.

faffi

Thanks again! Without having a closer look - the bikes are sitting in a barn waiting for work to commence - I can see two options without going the Trophy route; fabbing a mounting bracket on the frame or making a clamp around the swingarm shorten the brake stay arm and then bolt the abbreviated end to the clamp somewhere along the length of the swingarm. That would mean that the brake forces are supported by the swingarm instead of the frame, but a lot of bikes to that.

Is there something speaking against either solution? I wouldn't want to weld on the frame, rather make a bracket that could be bolted in place, if I went to uphold the frame support for the stay arm.

MickMaguire

Both are really bad ideas - your life could depend on how well or badly you do this - if it breaks in use you could die... Spend a few tens of bucks for the Trophy parts and peace of mind

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Addendum - sorry after re-reading the above I realize I came across a little abrasive. I dont mean to but this is serious stuff - unless you have the engineering ability to accurately calculate what your mods to a swing arm might do, or exactly how the torque reaction bracket that you proposed will behave in use / stand up to the considerable stresses then using such routes would be high risk. Lower risk is to use parts from similar bikes that will just bolt up without modification. This way you know that even though you are not quite using as intended you will be in the same ball-park engineering-wise. i.e. the part is being used pretty much in the way it was intended in the configuration that it was intended and the mounting locations it is bolting to were designed to take similar forces etc. this way you keep the safety margins up without tricky calculations or expensive cad simulation. My point is / was you can get used Trophy brake parts for little money on ebay - maybe as low as $100 or less if you shop around. The Trophy brake will bolt up to the Tbird swing arm and is designed to use the same rotor as the daytona - so for $100 you will have a no fabbing, bolt-up solution with good peace of mind that it should not fail when you are piling on the brakes to avoid an accident.

[/soap-box off]

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Mick...

Just remember; an awful lot of the free advice you will get on forums is worth exactly what you paid for it. There will always be somebody trying to convince you to do something really stupid, just because they did it or want to do it.