A65rebuild

Started by MITCHELL, 24 Aug, 2019, 18:53

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MITCHELL

Hi all, just assembled and fitted front forks, there's a slight difference in length, about 10 mm, am I right in thinking this will be ok when the front wheel is fitted and is probably due to spring tension, the distance from bottom of fork leg to top of chrome bearing housing is the same on both legs, as always will be grateful for any advice. Thanks Dave.

berniej

If you're seeing that difference when both forks are fully extended then I think it's a bit odd as spring tension - or compression - shouldn't make any difference.

If you're sure that the sliders and stanchions are identical then the only thing I can think is that maybe one of the forks isn't fully pulled home into the top yoke - but a 10mm difference sounds quite a lot for that to be the explanation.

--Bernie

'49 M21/B31 hybrid
'56 M21 combination
B40 Super Star
A50CC project

MITCHELL

 Checked the forks at the top and there both about 5mil down, ill take them out today and check I haven't done something stupid.

Mike Farmer

 :) :)

I had this problem when I put the wheel in it was leaning over. I gave it a flat handed clout against the tyre there was a sharp click and it went were it should be. Only thing that I could figure was lack of lubrication and the end of travel. Its ok now.

Mike 8) 8) 8)

MITCHELL

Hi Mike, stripped them down yesterday,circlip had come out on one, the basket contained 3 sliding tubes one of which was quit rusty the other had no groove for the circlip
so I had one machined in,now I'm not quite sure the groove is deep enough, ill assemble again today and give it a good testing before fitting the oil seal holder.

MITCHELL

#5
Sorted  groove was deep enough but a tad to low, ground a slight chamfer to the edge of the top Bush and the circlip sits in nicely now, having gathered together a few bits this is the first bit of assembly on to the frame so have to say getting a bit excited. If I can work out how to do it ill post a photo.

MITCHELL

Ouch!!!!!,I've read on here a few times about the difficulties removing and fitting swinging arm bushes so patiently filed away for hours and removed the old ones then with the aid of a length of m10 a bunch of washers and a couple of nuts drew in the first,all going well, repeated procedure for the second bush, with about 5mm to go it just will not budge, an extra bit of oomph on the spanner an ping, m10 sheared and shot a cross the garage like a Bullitt, have a bash with some m12 tomorrow but I'm thinking......maybe cut off the last 5mm, any thoughts? Cheers.

Bess

Hi,
    Is it the outer sleeve or the inner sleeve that is protruding?

Regards..

Mike Farmer

 :) :)
Personnaly wouldn't cut it except as last resort. I would try taking it out again, ensuring that the tube is 100% clean, then try again. I'll bet there is someone with a press living close to you. then its a 5 minute job.

Mike 8) 8) 8)

Bess

#9
Hi,
     The bushes must protrude equally do not cut.

The outer sleeves must touch centrally in the swinging arm leaving the inner sleeves protruding equally each side a few mm. When the bike is complete sit on it and tighten the swinging arm spindle nut to securely trap the inner sleeve in a loaded position ensure some clearance to allow the arm to 'swing'.

Best wishes...
   

MITCHELL

Morning gentlemen, it's the outer Bush that is still 5mm short of being flush with the swinging arm tube, the other side, the first one I put in, the outer Bush is flush and the inner a mil or so protruding which I think is right, I'll have a bash with the m12 and see what happens, I don't really want to take it out again as I can't see a way to remove it without damaging it,thanks for the help again,Dave.

Mike Farmer

 :) :)

I trust that you don't have to re-do it, However if you do you might try this: - Very slightly chamfer the "leading edge" then put it in the freezer overnight. The cold will have a very marginal shrink effect--just enough to make the difference. Actually its a method that I use for any bits that are an interference fit.

Mike 8) 8) 8)

MITCHELL

Thanks Mike, I did warm the s/arm with a hair drier (so not to damage t h e finnish) before inserting the bush.

MITCHELL

Evening all, bushes in, 12 mm rod and gentle tap under pressure, but have to say wouldn't want to fit them for a living,anyway now have all the bits for the rear brake linkage cleaned up and wondering about some sort of plating, as there moving parts chrome wouldn't be suitable so maybe something like Zink, any advice/ ideas welcome as always, those that have working machines enjoy the weekend.Dave.

Bess

Hi,
    I use stainless, polish, fit and forget.

Best wishes...