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Messages - andut
136
« on: April 20, 2015, 09:15:45 AM »
Thinking about re-assembly of the engine whilst waiting for the case to be blasted and re-boring work - assume oil seals should be dry fit to the crank cases i.e. no sealant on outer face ?
Any tips, or potential 'gotchas' when re-assembling the 400 unit ?
Thanks !
Andy
137
« on: April 08, 2015, 09:32:41 PM »
Engine striped now and I was hoping I'd get away with a light deglaze of the bores that I measured at 51.0 (but only have vernier callipers available) Ring gaps were on the max tolerance so I have ordered a set of std rings, but subsequently left the barrels with a machine shop to hone but they have mic'd bores at 51.1 - does that sound like a rebore to next size is required ? Will hang on until the new rings arrive and will check gaps, but should I be prepared for a rebore ?
If so, any recommendations for oversize pistons ?
Thanks
Andy
138
« on: April 03, 2015, 05:21:16 PM »
I try not to think to often Drew, it usually costs me time & money !
I'll reuse the steel washers with a smear of Hylomar as per Ken's guidance and renew the two Dowty seals and keep an eye out for leaks when I get it back together !
139
« on: March 31, 2015, 10:05:51 AM »
Well done Drew !
The bike looks and sounds great definitely a source of inspiration for me !
Andy
140
« on: March 31, 2015, 10:03:04 AM »
Thanks Ken ! I'll definitely replace the 2 oddball washers - just need to find some !
141
« on: March 29, 2015, 08:10:49 PM »
The old washers look like copper coated steel washers - does that sound right ? Should they be copper and therefore replaced ?
142
« on: March 29, 2015, 06:23:09 PM »
Just started to strip the engine.
Do I need to renew the copper / steel washers that go under the cylinder head nuts ? I will definitely need a couple of the rubberised washers under the pillar nuts, so does anyone know a good source ? Just checked cmsl and fell over when I noticed the cost !
Andy
143
« on: March 05, 2015, 08:38:36 AM »
Thanks Drew ! I sent Steve an email last night about a fork leg he has for sale - I'll try to rescue mine first and will no doubt end up buying another one !
Andy
144
« on: March 04, 2015, 08:36:14 PM »
I'll try clean it up and see what happens !
Any advice for fitting new seals ? Use the old seals and a large 'fine adjustment tool' ?
145
« on: March 04, 2015, 07:26:34 PM »
Sorry - thought I'd attached an image - should be below - fingers crossed !  Andy
146
« on: March 04, 2015, 06:55:30 PM »
More advice please !
I'm renewing fork seals as part of my rebuild and having struggled to remove the RHS fork seal, I can now see why from the attached photo. Seal appears to have been glued in , and covered up some prior abuse !
There are a few deep gouges into the machined seal facing sufaces of the ally casting. I can dress the edges of the damage to remove sharp edges, but am I wasting my time ? Looks serious to me, but this is all new to me ! Can this be reworked, or am I looking at replacing teh case ? - any advice greatly received !
Thanks in advance !
Andy
147
« on: March 03, 2015, 09:46:37 AM »
Ok, I'm convinced it's not right and it has to be !! Managed to use the bottom edge of the thick washer to gently tap the new brg most of the way off of the steering column without damage, but then the drift slipped a bit under the rag I was using and I now have a slignlty damaged brg cage - bugger !
New brg now ordered together with a thinner lower washer, so hopefully I should be able to get a closer match between the old ballrace and new (again!) tapered brg stack heights.
Andy
148
« on: March 02, 2015, 08:49:11 AM »
Thanks Roy !
I did read your thread earlier and ordered the same dust seal with steel inner, so it sounds as if I have the same set up of steel washer on the steering column, then the dust seal with steel inner and then the lower brg.
Do you recall if you had many threads showing above the top brg when you fitted the top adjusting nut ? That's the worry I have - I can only get a few turns on the adjuster nut without over-tightening the steering. Both outer races are seated in the frame, so I'm debating if a few turns of the top nut is OK, or if I need to start again and remove the lower brg from the steering column and refit without the steel washer at the base of the assembly - could be fun !
Andy
149
« on: March 01, 2015, 01:00:31 PM »
Thanks Martin,
I did use the old brg as a benchmark, and it was taller than the new tapered brg on it's own, and then shorter than the tapered brg with washer, but only by about 1mm, so I went with the washer !
Strg lock stops do engage as it is and the steering lock also works, so I can't be far out, but I'd rather have a few more threads engaged on the steering nut above the top brg ! I'm assuming it will bed in and give me a bit more once it's been in use - fingers crossed !
Andy
150
« on: March 01, 2015, 09:46:49 AM »
... resurecting an old thread as I've hit a similar problem !
I'm fitting a DSS taper brg kit to my 400F2 steering column. The thickness of the new tapered lower brg was a little thinner than the original ballrace, so I used the washer (about 2mm) that came with the kit and a dust shield which made the new lower brg about 1mm thicker than the original.
Top brg appears to be seated, but sticks out of the top of the headstock by a few mm as per Spitfire's photos above and I can now only get a couple of turns on the top nut after pulling the brgs home as much as possible (had to use the top yoke nut and spacers to pull the column up into the headstock before I coud get the steering nut on) & backing the nut off to allow the steering to turn. I've only got the yokes fitted without forks or wheel, so I'm sure with the added weight of the front end, I'll be able to get another half turn or so on the nut and still have free movement.
Has anyone else had similar experience ?
I'm hoping a few miles will further bed things in and allow me another thread or so no the steering nut - does that sound likely ?
The thought of pulling the new tapered brg & washer off of the steering column does not fill me with joy !
Thanks again for any help or advice ! Andy
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