OzVMX Forum
Marque Remarks => Suzuki => Topic started by: oldfart on February 19, 2008, 06:47:26 pm
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Is this the correct swing arm for a TM 250 . If I was to change the arm to a 74 model would the bike then be eligible to be ridden in pre 1974 class ???
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No you can't ::) Well yes you can :-X OK so it looks like I was wrong ::) :-[ :-*
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The only difference that I can pick up is the swing arm
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OK "suck it and see " ;) I am sure they do not fit up easily.
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suck what ???
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Wont fit. if you can make it i have 3 75 frame here you can convert for me. cheers.
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The '75 swingarm appears similar to the '74 except for the shock mounts being further forward. Fairly certain though that the '75 has a larger diameter pivot bolt (& different bushes etc) & that the pivot bolt holes in the frame obviously are larger too. Not sure of any other differences though - I would have thought that by replacing the swingarm it pretty much 'converts' the bike to '74 specs? Maybe Tim can share some light on other differences?
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pretty sure the pivot width is different too. The frame I have for my project 'I assumed' to be a '75 but in fact is a '74 with modified top mounts so she'll be modified back to stock and remain pre'75. This means all I thought was isn't so I've given you a bum steer or two along the way sorry Stew. Why don't you just put it together and ride it in till another frame happens along or you find/fabricate a swingarm to suit. I can't see any other differences between the '74 and '75 either, in effect side by side you won't pick the difference unless you know the manufacture date/chassis numbers off the top of your head. Not that many '75 TM250's around and it would save a lot of stress ;)
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I've got the good oil on what to do :) Yep I will be keeping it as a 75 model until a 74 frame surfaces with a swingarm .
Hey Freaky you greedy sod , 3 -75 and still can't jag a 74 ;D
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I thought that the top mounts on a '75 TM were about an inch or so further forward than the '74 model.
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I was under the impression that you can race the 75 TM250 in the pre 75 class
Can anyone confirm that you can't or is it different for certain events
I have both 74 and 75 and I can check any measurements you want to compare on the two
will have to wait for the weekend to have them side by side
Regards
Halo1963
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I was told in n uncertain terms any frame over 4900 ( for example) 1975 was not eligible, having said that the motor was allowed in a 74 frame as it was identical. I have a complete 74 TM i raced Dt on last year and a 74 with a 75 motor i did the MX rounds on.
IF MA changes the rules so you can ride 75 model TM frames in Pre 75 i have 3 bikes ready for sale and also the 74 frame i got Quicky painting. Being able to use a 75 frame would have saved me a lot of pain hanging onto these 75' model bikes as i have been rooting out 74 frames to make em legal for a long time.
I Would say for local club rounds of DT you should get away with a 75 on 12-13" shocks as most wouldnt pick it and you have no real advantage, but im not so sure on MX if you brought a 75, rules are rules and the travel would make an unfair advantage, they ride like differant bikes on an MX track. they are not identical. well at least they dont feel it, maybe short shock would change it some but still they are 75, if you let that in see what else then make it in MXB thats 75. Chance it and see but if its allowed then it should be changed in the rule book so every one is clear, not just a few i the no
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1975 TM Suzukis have always been allowed to race in pre 75 as long as the 4" and 7" suspension limits are adhered to. That's usually done by fitting a '74 swingarm or relocating the lower shock mounts. The M model generally accepted as flow on models.
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Firko - Just to clear the air, if I was to change the swingarm to a 74 model and leave the top mounts alone , and adhere to the suspension travel limits ........this makes it legal to race ???? not that I'm going to be at the front of the pack ;D
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sounds that way to me oldfart..just don't go west young man :D
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or south. or if they have always been allowed then someone should get it changed in the rule book or whats the point in having a rule book. It says k, L. Just an observation
Old fart IF you get a 74 swing arm to fit give me an address and ill send you up a couple of 75's for the "mod".
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Freakshow, I was the eligibility advisor at both the Tanunda and Port Pirie Nats and last time I looked at a map they are both in SA. I can vouch for certain that at least two, possibly more '75 TMs raced at those Nats.
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Im just syaing, maybe some one needs to advise MA as the MOMS still says J, K, L only. Rules are rules why would a scutineer let it through at any round if he is doing his job and reading the book ? I'd love to ride at least one i have as its a real goer, but then again we had issues with the MXB down here. So i think its a bit hipacritical if your using the book on one hand then excluding yourself from it on the other hand.
Regarless of who lets it through on the day, you need to sort the MOMS out to reflect that change if its been Approved. I'LL go with the concensus if its been OK, but get it in the book otherwise that manual is an even bigger usless pile of shite.
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Freaky
Keep your hat on mate :) I'm in the process of asking MA for a ruling .
Have just sent them an email with regards to what has been discussed on line ( with no names or race events mentioned ) :)
I have asked for it in writing on an official letter head so it can be produced at scrutineering if questioned ;D
Will keep you posted on the outcome
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Thats what you want. IF you can get it in writing, then everyone knows the rules. Rather than line bals depending on who your scrutineer happens to be on the day. THe whole Specials and like machines is a very grey area. CAn you keep me in the loop Oldy as if its a goer id like to freshen up a few old girls i have store for a rainy day and let em hit the track again in 08.
Love ya Work :O)
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Oldfart did you get a ruling ?
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no ruling yet .
I had a good chat with D.T about a month or so ago and informs me that a TM 1975 bike will not pass full stop . After it was explained why it made sense :)
By the time you move the shock mounts - change the swing arm - and so on I came to the conclusion stick with what I've got ride and enjoy it :) :) :)
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yes the runling was 1974 is still 1974 and 1975 in this case is still 1975 :O)