Pre 85 Legal Modifications

[Nathan S]

Can't see why it would be any more hazardous than it was in 1983 or 84.

The disc braked Yamahas grate on me a bit, to be honest - I've seen plenty with Z-spokes and 43mm forks running as pre-85, despite the fact that they're clearly 1985/86 model parts....

If someone wants to adapt disc parts from a 1984 XT (or a 1984 anything), then that's 100% within the rules and the spirit of the category.
Seeing as a pre-85 Honda front end goes into a pre-85 Yamaha so easily, you'd have to be exceptionally one-eyed to bother with the XT stuff.

[lms6201]

just useing the xt as an example , yep same issues as 1984 , and i bet all sorts of conversions were done then as well ?

[holeshot buddy]

that bike was prepped by owner geoff homes as johnny o said
for scott to ride if i remember well he didnt like it
and then wrote a report in a mag about riding old dinosaurs
and how bad it was

[JohnnyO]

Nathan the Z spokes and 43mm forks were on YZ's in '84 with a drum brake. Like you said it would be perfectly legal to fit a '84 CR or KX disc brake front to a YZ for pre '85.

[Nathan S]

Nathan the Z spokes and 43mm forks were on YZ's in '84 with a drum brake. Like you said it would be perfectly legal to fit a '84 CR or KX disc brake front to a YZ for pre '85.

Yes you're right. I was a bit vague.
If its got Z-spokes and a disc brake, then it isn't pre-85 legal.

[All Things 414]

my view comes from a safety point , running a bike with drum against disc bikes (esp. the faster classes)can be hazadous , unless u want to just follow them around

Pick a different line or get a good start. Cheaper than playing around with front ends.....

[Ji Gantor]

Hi Johnny O and Holeshot Buddy,
So Geoff strikes again.
Two Pre 85 bikes with USD and disc brakes.

The story on the day goes like this.
My brother was talking to Scott about the big YZ an told him that he had one back in the day, Di Gantor also told him that they handled like pus and that everybody back then knew that. Scott being a Yami men was unbelieving but after his ride he decided to call some Yami guys in the States. The next time Di rode on Scott's track (out the back of the petrol station) Scott told Di that he was right, the guys in the States confirmed what Di had said. So I guess Scott decided to write about his new found knowledge.

Ji

[Ji Gantor]

Okay, you guys are great.
So the Honda CR500 1984 front disc brake assembly fits the Yami.
This is good, I will start looking for the disc.

Ji

[Ji Gantor]

Here you go Paul,
My Maico's first outing was at the Conondale Classic last year.

Enjoy
Ji

[vandy010]

i had a brief conversation at a practice day at a local track where Scott Bishop was talking about the YZ490 that was being prepared for him to ride at coolum. he didn't seem as excited as i would of thought about it all but i do recall him saying his only request was that the bike have upside down forks and a disc brake or he wouldn't ride it.
i doubt it's pre~85 legal, as thats not what it was built for.

[Ji Gantor]

Hi Vandy,
With that line of thought Glenn's bike would not be legal then.

Ji

[caps 999]

yeh but glens forks are pre 85 and the brake kit is to

[vandy010]

i doubt it's pre~85 legal, as thats not what it was built for.

im of the impression that the bike wasn't built for pre~85 competition.
rather, the bike was built with a modern front end so the rider looked cool doing a few demo laps.
theres a difference.

[Ji Gantor]

I see.
Thanks Vandy.

Ji

[holeshot buddy]

i know the yamaha geoff built and it had period correct front end and brakes
same as glen bells bike  he did it up for himself
not for scott bishop
he just sponged a ride at legends day at nationals. most bikes were supplied to riders
i know i supplied four. darren smart,brian flemming, didnt complain
about the bikes they just enjoyed the moment and caught up
with everyone we all had a great day
there was more people around our display
than there was at the factory teams