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British Bikes / Re: T120 top end rattle
« on: February 19, 2011, 12:05:37 AM »
any chance it might be preignition
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British Bikes / Re: T100r crankshaft endfloat
« on: February 15, 2011, 07:24:49 PM »
hi guys sorry no input for a while what with cold weather and such not much been done recently bottom half built bar tightnin up a clutch center nut and main shaft one, cant do that till its back in the frame to use the back brake to lock it to tighten them. Will be puttin the pistons, cylinder and head on tomorrow I hope only worry I have there so far is the piston rings no top stamped on the compression rings.
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British Bikes / Re: T100R
« on: November 15, 2010, 11:19:12 PM »
Rex I think we would just get the same firm to do it for us with a heilicoil one cant keep retaping casings
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British Bikes / Re: T100R
« on: November 14, 2010, 11:28:52 PM »
Ok assuming all bearings and such has have been replaced and the rebuild is starting anything in particular to watch as reguards oil leaks just the bottom end at the moment, new oil seals will be put in all round. The drain plug on the chain case has about 2 good threads left so that needs to be sorted, so tap it out or is there a heli coil or modern equivelent.
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British Bikes / Re: T100R
« on: November 13, 2010, 12:36:54 AM »
No planns to rebore at the minute the bore looks fine its already bored out to +30. The whole bottom end is new bar the big ends but that may change depending on what things look like when the con rods are taken off to grind the crank, Question if things look fine is it a good idea to replace the big end shells anyway or leave well alone?
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British Bikes / Re: T100R
« on: November 12, 2010, 10:52:34 AM »Duppy
It's a strange fact of life but when a hard and a softer metal are rubbing together it is always the hard metal which wears.
A good example is the Gudgeon pin or wrist pin as our American friends call them, the pin always wears before the little end.
True Rex we have were going to replace the small ends but the same guy in the machine shop told us the wear was on the gudgeon pin so we are waiting for them now.
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British Bikes / Re: T100R
« on: November 12, 2010, 12:14:24 AM »
Ok when I said "force" I meant the old bush can be taken in and out quite easily at room temp. Under the same conditions the new but the new bus wont, so the case needs to be heated to get it in so that looks like a good fit to me. I may have been a bit alarmist over how bad things are and probably tried to paint the worst scenario. Like wnen I posted about endfloat it started out a mile but was only 25 thou. and for some reason I can't understand why the wear on the bush, as a whole seams to be more than the aluminium the shoulder on the old bush is worn eonugh to give 25 thou. endfloat but the new one brings it down to 17 thou. on measuring the two shoulders with a mic. same for the od of the bush 4 thou. more than the old one.
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British Bikes / Re: T100R
« on: November 11, 2010, 05:35:54 PM »
A sleeve hasnt been made just talked about as a possibility, when we got the new one it wouldn't go in without heating the case up I assumed it would be lose like the old one.
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British Bikes / Re: T100R
« on: November 11, 2010, 01:16:31 PM »
The bush hasn't been fitted yet. It is still out off the case till the crankshaft has been reground but the diameter of the new bush is 4 thou up on the old one and wasn't going to go into the case without some force, the machine shop that is doing the other work is going to fit it and make a slieive to fit if they think that the new bush is not a tight enough fit. I full confidence in them they jave been working on bikes since I was in my teens and the guy's eyes lit up when we brought are box of bits up so I dont think they will do a botched job, should know with in a week.
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British Bikes / Re: T100R
« on: November 10, 2010, 11:24:16 PM »
ok this post was originaly about end float it it is 25 thou the new bush is goin to make it 17 coz the shoulder on the the bush is 8 thou thicker than the old one.
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British Bikes / Re: T100r crankshaft endfloat
« on: November 06, 2010, 11:36:58 AM »Good point, I forgot the US got the R model before the UK.four
So Duppy, is the petrol tank a three or four bolt mounting?
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British Bikes / Re: T100r crankshaft endfloat
« on: November 05, 2010, 11:44:19 PM »
it is starting to look to me that a 5ta has been sold as a t100r.
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British Bikes / Re: T100r crankshaft endfloat
« on: November 05, 2010, 01:35:40 PM »
This bike is supposed to be 66 model by which time I think the right hand bush was replaced with a needle or roller bearing and could the right hand case been replaced with an older one. The diagram in the hanyes manual only shows the newer type and shows a spacer on the right hand side
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British Bikes / Re: T100r crankshaft endfloat
« on: November 04, 2010, 07:12:29 PM »
Sorry for any confusion. We have only as yet replaced the bearing on the left hand side and wanted info on how much endfloat is allowed so for the final build we could have any shims needed already here.
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