replacing fork seals - '79 YZ

[mainline]

I'm 99% sure, they certainly look like the ones in the parts diagrams and the brochure copy I've seen. Looking at the exploded view of the parts diagram there seems to be a component called a sub-spring which sits above the rod and below the main spring. The diagram is a bit blurry but I think that's what I see as I look down the fork tube. When I pull the upper and lower legs apart (excuse the pun) there does seem to be a spring type tension there.

If I could figure out how to post the pic I would. The Yamaha America parts website has the pic http://www.yamaha-motor.com/sport/parts/home.aspx


What do you think?
 

[DJRacing]

The small topping out spring should be under the top of the damper rod. once you have taken the long spring out of the forks all you should see down them is the top of the damper rod. ??

[mainline]

Stopped in at the Yamaha dealer on the way home yesterday, and asked the helpful guy at the parts counter what they used. Would you believe a freakin' broomstick!! He said just jam it in there and hold it  tight while you undo the bolt.

Got home last night, grabbed my handy broken broomstick (which now has 1001 uses) pushed the fork upside down onto it and leant on it a bit and the bolt came out with absolutely zero effort!!

So there you have it, a magic broomstick.

Thanks for your help though DJRacing, it's been much appreciated.

[Hoony]

modify your made up tool for reassembly, you dont want to get any timber contamination in the forks when you put it back together.

[YZ250H]

So has anyone worked out if this jigger fits the 43mm forks yet - or am I going to be the guinea pig
I know the length is way more for the 250H - like nearly 800 mm
24mm or not 24 mm that is the question 

[oldfart]

Try a Holden bottle jack handle ......nice and long and easily modified 

[mainline]

Had a quick squiz at the Yamaha parts catalog for your forks, and they do seem to have a spindle on top of the damper rod similar to mine. Have you given the Magic Broomhandle Fork Tool (tm) a go yet?

[YZ250H]

Yeah,

I had a look at those too.  Unfortunately Mr Yamaha keeps changing the part number.  I have a selection of nuts from work on had.  I will start with 24mm and see what happens.  Just a tack weld should do it initially until I'm sure of the size.  I will let you know how i get on.

Cheers

[YZ250H]

For those with 43mm forks YZ250H style the nut on the bottom is 30mm not 24mm.
Hope this helps someone else.  Made up the tool yesterday - worked like a charm.  Thanks DJ.  A great tip.

[DJRacing]

YZ250H, no problem, sorry I never got to try my one out on a set of 43mm forks, but I havnt had to rebuild any lately and I have been busy with other bikes but I'm glad you liked the tool. I should post up a clutch basket holder for you to copy. Have you got an old set of vice grips?? They make great adjustable clutch basket holders, a couple of bits of steel welded on in the right place and bobs your uncle, a tool for all clutches. 

[mboddy]

I have a few different size forks.
So I use a 3/8" T-Bar and a long extension.
The 19mm is a standard Dowidat socket.
The 24mm bolt was welded to a 15mm socket.
But now I have a press I prefer to force the bolt and socket together like with the
22mm bolt pressed into the 13mm socket and the
30mm bolt pressed into the 19mm socket.

[Hoony]

Very Clever idea.

we should start a seperate thread in Resto Tips with all the special tools (complete with tips) we have made to do things over the years.