Pre 81 MX class rules?

[NordieBoy]

Usually you can get away with "follow on" models.
This is where the bike hasn't changed between years.

http://100megsfree4.com/honda/h0500/xr.htm

The only difference between the '79 and '80 models was a smaller exhaust and a different tank sticker.

In '81 it went to mono-shock.

The 200 would be a bit too new.
You would have to race it in Evolution class (pre 85).

[Kwaka-Kid]

yeh dude - sorry i cant have explained myself properly, and yeah i already googled that site out :P

i mean still race the 500 - but can i put my 84 XR200 front wheel in? god its still crappy drum brake and id still use original forks. Secondly what can i do in terms of exhaust? as it came with a home made (back in mid eighteys) rolled can muffler, as the original rusted out - surely they cant expect it to be stock?... and if not hten how far can i go? buy a brand new system ? (not that i would) but get the old man to make a better system

[NordieBoy]

Exhaust shouldn't be any problem at all.
I'm sticking one of these on :cool2:


Most of the serious guys stick modified period type pipes on because they look the part. Imagine a 1979 XR500 with a T4 hanging off the side

Hmmm. Not MNZ affiliated, no noise restrictions?

This bike is straight headers and is the sweetest sounding thing you've ever heard.

The only problem with sticking the 200 wheel in (if it fits) is it's probably going to have bugger all (ok ok even buggerer all than normal) brakes as the 500 is quite a bit heavier than the 200.
But if it's just to have a play type of thing then go for it.

[Motu]

The next VMX is on dec 5th at Kiwitahi rd - that's on the right off SH16,just after the first Woodhill Forest entance sign,go to the top of the hill and turn right,it'll be a couple of km or so along there.

We had a Northern Trials Group trial up there today - Derick Hamm runs the NTG and also does VMX,so he has got this property for the VMX.One of the best things about trials and VMX is that you get to ride where others aren't allowd,on private property.Kiwitahi rd is fantastic...it sits at the top of the ridge,looks over to the forest,360deg views,stunning.

The NTG trials are hard for twin shocks,but they make an easy line for us - didn't help me today,I DNFd.On one section with a very steep climb I sat down and the bike started to loop - I stepped off the back and brought it around in a perfect 180...but it landed hard,my forks are tweaked and I think the front axle is bent.I have some shit in the carb and it kept stalling - I was absolutly knackered,so after the 2nd round put the bike on the trailer and rehersed my excuses.

Hope you can make it KK,I'll be there - as a spectator of course.

[Kwaka-Kid]

WICKED!
cheers dude!
i JUST GOT the XR500 going fully today.. all good cept when i take her off choke to ride up and down the road it wont idle? yet i have to blip throttle up a fair bit to keep her revving, and she does smoke a fair bit but not as serious as my 200. Hopefully will be there if i finish designing my own exhaust/muffler, my headers are SHOT and braised together rust is about all they are now.

[NordieBoy]

Carb clean?
Rings?
Traditional crack between plug and exhaust valve (or is that just the 250's)?


My 250 is a bit low on compression but I really really need to lose the counter balancers 'cause it just revs up and down so lazily it's not funny.
Perfect for trail riding as it'll go anywhere but I want a bit of snap to it.

[Kwaka-Kid]

is this your beast nordie?

was my old xr250, brother is on it, he woulda been 15.

[NordieBoy]

Looks somewhat like it.

Mine is the XR in front of my brothers gut...



The overbored Nifty with knobblies was fun as well

[Muzz67]

After riding B Daniels XR 250 with the Bshaft removed, my advice would be to LEAVE EM IN THERE!!!!! It was awfull and a 10 minute race gave me the worst arm pump I have ever had.
The tyre choice for a 23" rim is not good, and its probably best to relace a 21" rim onto the hub as suggested. No other front wheel slips into the forks without modifications, so stick with the original hub.
As for the 500 not running well, this is probably caused by the leaking exhaust, as I know when the header on my 500 crapped out it started backfiring on over-run and would not idle.And it was only a small hole near the head!