Messages

2356

Bike Talk / Re: yamaha yz250h rear suspension....

« on: September 04, 2007, 08:19:46 PM »

The machinist should know what tolerances each bit needs.
You should supply him with a new genuine yamaha shock bush, so he can work out the right diameter of the pin first.
He will then work out the i.d. of the brass bushes for the swingarm based on the pin size, and will allow for a small amount of shrinkage in the i.d of the bushes when the are pressed into the swingarm. The o.d of the bushes are pretty irrelivant as the hole in the swingarm will probaly need to be redrilled as the alloy tends to elongate over time, if this is not done and the holes are elongated then it can distort the brass bush when it is pressed into place.
I even got mine to put a thread on the end of my pin so i could fit a lock nut instead of the split pin, that kept coming out.

2357

Bike Talk / Re: Stuck fork caps..now with stuck seals

« on: September 04, 2007, 06:45:51 PM »

maybe you shoul start eating dog food Doc

2358

Bike Talk / Re: yamaha yz250h rear suspension....

« on: September 04, 2007, 06:43:59 PM »

My 2 cents worth,

I got a new bush for the bottom of the shock, took it, the shock and the swingarm to my local machinist
They then pressed out the bush from the shock and the brass bush from the swing arm, turned down new brass inserts for the swingarm pressed them in, turned down a new pin to suit the new bottom shock bush, and pressed in the shock bush, all for about $50,
Snug as a bug in a rug.

2359

Bike Talk / Re: Stuck fork caps..now with stuck seals

« on: September 03, 2007, 07:34:39 PM »

Doc,
I'm a bit of a late comer to this problem of your's, but am I to assume you have removed the dampening rod bolt at the bottom of the fork leg before embarking on this exercise? And removed any clips holding the seal in place? And put the axle lug on the fork leg in a BIG vice?And you have pulled on that tube with all your 65kg might? It could feel solid for the first few pulls but it should loosen.
I have never had a fork seal stick before.
That was a little to freudian even for me.

2360

KTM / Re: kick starter 495

« on: August 30, 2007, 08:51:34 PM »

Tony,
I have tried to p.m. you re the officials, don't know if it worked or not, any probs 0401519655 works well.

2361

Yamaha / Re: Does YZ250J shock fit YZ125J ??

« on: August 30, 2007, 06:31:42 AM »

Hope this works

[attachment deleted by admin]

2362

General Discussion / Re: Noise Emissions

« on: August 29, 2007, 08:23:33 PM »

DJ,
This is how the test is to be done as per gcr's
Noise emmision must be measures with a microphone placed 500mm from the exhaust pipe at an angle of approx 45 degrees measured from the center line of the exhaust end, and at the height of the exhaust pipe, but at least 200mm from the ground.

The reading shall be taken with engine warmed up running steady at the specified revs and the bike in neutral.

The revs shall be measured using a calibrated tacho or a vibrating reed tacho held against any solid part of the machine.

Ambient sound within a 5 meter radius of machine should not be highter than 80 dba

other than the rider the sound testing operator and a person to hold the front of the machine there should be no person within 3 meters of the machine.

Sound test apparatus should be set on slow response.

Revs for test

85cc                        8000rpm
85 to 125                  7000rpm
126 to 250                5000rpm
251 to 500                4500rpm
over 500                   4000rpm

96 dba as of 1 jan next year.

2363

Tech Talk / Re: seat covers

« on: August 29, 2007, 08:00:51 PM »

I'm sure mxm would do one also, The bultaco guy in N.S.W. is their dealer I think.
Can anyone else elaborate?

2364

Yamaha / Re: Thoughts of a TT500 victim!

« on: August 29, 2007, 07:57:04 PM »

That log could replace the now infamous "Pine cone"

2365

Yamaha / Re: Does YZ250J shock fit YZ125J ??

« on: August 29, 2007, 07:53:54 PM »

Just be careful when retro fitting a J shock to a mono cross system, not only is the shock longer (higher rear end) but the compresion dampening knob sits above the top shock mount and can cause a problem when trying to refit the tank.
Been there, done that.

2366

KTM / Re: kick starter 495

« on: August 29, 2007, 07:42:32 PM »

Tony,
It's in paper form, pm me your address and I'll get it in the post.

Do you have enough officials for Coles creek?

Dennis,
Are you still selling the 504 or what??

2367

KTM / Re: kick starter 495

« on: August 28, 2007, 10:01:20 PM »

Tony,
Is it an '83, if so I have a test already scaned and waiting delivery.

2368

System problems? / Re: Where are the pictures?

« on: August 25, 2007, 10:47:09 PM »

What's really weird is I posted a pic and it worked fine and about two days later it had dissapeared?

2369

Husqvarna / fork leg size

« on: August 23, 2007, 07:03:00 PM »

Can anyone tell me the size of '85/'86 Husky fork leg Dia.

2370

Maico / Re: swaping cylinders

« on: August 18, 2007, 12:44:31 PM »

I realise it's not really an issue at club level, I guess what I am tyring to find out is if I was to venture to Tassie for the titles, would a reed valve "Pre 85 " barrell be allowed in the evo class?