OzVMX Forum
Clubroom => Tech Talk => Topic started by: cambo on July 21, 2015, 09:19:03 pm
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Does anyone know if 81 Yamaha yz465h forks are used on any other bikes of that era maybe yz250 or it enduro models, they are the larger 42 mm tubes .Iam trying to source the lower legs or complete forks as my bike has 490 j forks or lower legs fitted and could stir up a hornets nest in evo class.Any help would be appreciated.cheers.
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Yamaha zedder disc will tell , you type in the part numbers and it will bring up the models with the same part if any.
I will have a look on mine give me 5mins
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I looked on my zedder disc , no matches
yz 465 have 43mm forks , I think the 250 had 38mm
They are hard to find even on eBay usa 465 forks
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250H is the same.
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My understanding is that the lowers are 81 250/465 only but the uppers are the same for H & J 250/465 models
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No hornets nest, under the current Evolution rues, your J forks are legal. There is however a submission with M.A at the moment to have the rules changed which will see them become illegal for Evo. The cut off deadline for feedback to M.A is 31st July 2015, so if you as an Evo rider or your club want to have a say, for or against the submission, get your emails into M.A pronto.
K
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No hornets nest at all!! Under the current rules start looking for a mid 90s front end make a bracket off the caliper mount as a brake stop. Fit a mid 90s WR500 engine. Then you will have a great EVO bike under the current rules. Naturally this post is just like Big Ks unbiased ::). Has Viper made any submissions? Heaven VMX and QVMX have made submissions absolutely as the MA guidelines require. We have been vilified with untruths, half truths and often out right lies by a few with vested interests. Read the Heaven and QVMX submission and explain why it is bad other than require that bikes are built as the vast majority have always understood the EVO class. The fact MA can not copy and paste a submission into their own minutes has been used to rubbish us by people that should or did know the truth.
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The submissions to MA and I sent one in too, very similar to the Heaven and QVMX ones has provision for slightly different components to be approved. As the J model forks have only changed slightly they probably would be approved.
Also please note if the current rules were enforced (as written) current bikes would comply. No bikes are OEM.
All any thinking person wants is rules that can be understood and interpreted by anyone, not rules interpretations that are in one person's head.
Let the hysteria begin.
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Why so defensive? You've lodged your submission by the correct channels & only time will tell of the outcome, so why make it personal? All I have said is that currently YZJ forks are legal & that time is running out for anyone wanting to have an input to said submission. For the record, VIPER have sent in their thoughts & comments on your submission, in response to the invitation to do so by M.A.
K
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We at HEAVEN are dirty because certain lines were omitted from our submission at MA and the doctored submission used to rubbish our proposal at a VMX meeting in another state.
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Does anyone know if 81 Yamaha yz465h forks are used on any other bikes of that era maybe yz250 or it enduro models, they are the larger 42 mm tubes .Iam trying to source the lower legs or complete forks as my bike has 490 j forks or lower legs fitted and could stir up a hornets nest in evo class.Any help would be appreciated.cheers.
I believe the 250/465G are the same at 38mm. The 250/465H the same at 43mm. I think the latter YZ490 models all run 43mm. The later IT490 models also run 43mm but the mounting part on the leg to support the brake backing plate is different between the IT and YZ.
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How can certain lines be omitted from your submission? I assume you mean by persons other than those who made the submission? How can this be so?
K
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this is rapidly running off track?????????
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How can certain lines be omitted from your submission? I assume you mean by persons other than those who made the submission? How can this be so?
K
1 : we don't know
2 : Yes
3 : we haven't been told
This whole process is a farce. Certain individuals getting people to sign blank pieces of paper and calling it a petition. Certain individuals using altered submissions to badger people to sign these blank pages. Certain individuals telling people that an upcoming event in Qld is not under the FiM banner. It is a fu..cking joke.
Michael, there is a link here. I am surprised you cannot see it
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Well thanks for the helpful info on the forks issue guys, I think I will just leave them on there ,as I believe sourcing the originals will be difficult and if they are currently legal ,they will do.
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Back to your original question, "J" model lower legs where different to the "H" model, not only with the obvious brake lug location, but the "J" also ran compression damping adjustment (the little knob underneath the fork leg) which would require you to also run "J" damping rod.....a lot of fcuking around so you can still run the "H" upper leg. Might as well change the front end all together....Bugger.
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YZ250/465G upper tubes are longer than the later Yamaha 43mm forks.
I believe the LHS (brake side) lower leg is the same/very similar to YZ125L, but the RHS one is clearly different (clamp on axle retainer plate, vs pinch bolts).
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"Certain individuals getting people to sign blank pieces of paper and calling it a petition."
Are you referring to the petition at the Qld Champs Ted?
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Well thanks for the helpful info on the forks issue guys, I think I will just leave them on there ,as I believe sourcing the originals will be difficult and if they are currently legal ,they will do.
Yes don't go changing them. This is just my opinion.
As for the submissions being changed in the minutes yes that did occur. It would appear that that is why MA extended the deadline for responses. Again this is just a guess.
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"Certain individuals getting people to sign blank pieces of paper and calling it a petition."
Are you referring to the petition at the Qld Champs Ted?
Strange how someone would think that 120 riders would sign a blank bit of paper, must think they are all dim witts, including the 40 members from his own QVMX club,
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Any page of signatures has to include the full wording of the petition on them to be valid.
Failing to do this, demonstrates a "shoot from the hip" mentality, at best.
More importantly, when people are told a partisan and arguably inaccurate version of the story, so they'll sign the petition, it poses questions about fairness and partiality of the process and the people involved in the process.
What offends me most is that it appears the main motivation was to avoid any solution to the on-going rule ambiguity. I have no problem the people disagreeing with the proposal, but a simple, blanket rejection to the proposal, rather than working with it, is not helping the sport.
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Really Nathan 120 riders understand that the evo rules as they stand are fine, if it looks like a evo, rides like a evo, its an EVO. All this crap about WR 500 engines and bigger forks, does not make any difference to the out come of a race.Its the pilot of the machine, as was proved at the QLD Titles the biggest event in QLD ;D
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Then what's the point in having eligibility rules at all?
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Then what's the point in having eligibility rules at all?
Maybe the question should be why change something thats NOT broken. There are rules already in place and they work
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Not many people think the rules cannot be improved.
The fact that the person who formulated this petition apparently felt the need to misrepresent the QVMX and Heaven submissions, shows that they have an agenda beyond trying to make the sport run as smoothly as possible.
If the petition was formulated by someone competent, they'd have followed the basic rules of petitions. If they had any interest in fairness, they'd have also included a FULL copy of the proposals for punters to view before signing.
But neither of these things happened.
Nobody wants wholesale change to the rules. We want to see rules that people understand and can be enforced.
Why is that a problem?