This bloody bike. 1976 3CE

agreeing entirely with the last, very recent posts.
DO NOT DO ANOTHER THING UNTIL YOU CAN TELL US WHAT THE VALVE CLEARANCES ARE. All six of them.
If that checks out (8 thou inlet 10 thou exhaust + or - 1 or 2 thou) then the cam timing needs to be first checked using the marks on the sprockets and crank, if that checks out, then use DTI to check again.
CLEM
 
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CLEMTOG said:
agreeing entirely with the last, very recent posts.
DO NOT DO ANOTHER THING UNTIL YOU CAN TELL US WHAT THE VALVE CLEARANCES ARE. All six of them.
If that checks out (8 thou inlet 10 though exhaust + or - 1 or 2 thou) then the cam timing needs to be first checked using the marks on the sprockets and crank, if that checks out, then use DTI to check again.
CLEM
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What's a thou..mm please? 😉😁
 
pf1 said:
If it was working when bought and after some tinkering, doesn't work any more then that tinkering may well be the source of the problem. Or maybe I should just shut up.
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I think you'll find reading through, it was never working "properly". it ticked over and reved up a bit under no load on sellers drive but first ride it wouldn't rev over 5000, and has intermittent failing of one cylinder or more to fire reliably since. or at least that's how I read it.
 
a thou is for those that can read a manual micrometer and dont wish to mess with decimal points
eg 12 thou is 2 thou too wide, so fit a shim that is whatevere is fitted (say 60thou) plus 2 thou, fit a 62 thou shim, easy innit? and dont forget to put the chain on before you remeasure.
CLEM
 
CLEMTOG said:
a thou is for those that can read a manual micrometer and dont wish to mess with decimal points
eg 12 thou is 2 thou too wide, so fit a shim that is whatevere is fitted (say 60thou) plus 2 thou, fit a 62 thou shim, easy innit? and dont forget to put the chain on before you remeasure.
CLEM
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Now you're joking, Clem.

There certainly is a decimal point in a thousandth of an inch... somewhere, if you look closely. ;)

Why you guys still wish to measure stuff in cricket pitch lengths is beyond me. I grew up with the imperial systems of measurements, even pounds-shillings-pence up to '66, the switch to decimals all over was so easy and logical.

piet
 
sfcpiet said:
Now you're joking, Clem.

There certainly is a decimal point in a thousandth of an inch... somewhere, if you look closely. ;)

Why you guys still wish to measure stuff in cricket pitch lengths is beyond me. I grew up with the imperial systems of measurements, even pounds-shillings-pence up to '66, the switch to decimals all over was so easy and logical.

piet
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Do you realise, there were 240 pennies in a pound, pre decimal. Crazy.Anyway, however you do it, get those clearances done?
 
I know the discouragement first hand when seemingly impossible to solve. Would be funny (not to most) if the issue was just a plug wire. I see everything else has been swapped. Or did I miss something? Probably million to one . I happened to me..
Got to say, the satisfaction once licked, negates almost all the angst and head scratching. Got a feeling the mechanic here is missing something basic.
Red uses Ignitec, then you ought to have faith in the product.
 
welll...................thousandths of an inch is sort of metric, if you ignore the inch bit, (12 to a foot, 3 feet to a yard) I mean there is a thousand of little tiddly bits, hundreds of medium bits, and tens of quite big bits, a tenth of an inch, thats metric innit?
CLEM
and no I am not re-sorting my box of shims to that foreign funny sizing chart or buying a new micrometer and feeler gauges.
 
CLEMTOG said:
welll...................thousandths of an inch is sort of metric, if you ignore the inch bit, (12 to a foot, 3 feet to a yard) I mean there is a thousand of little tiddly bits, hundreds of medium bits, and tens of quite big bits, a tenth of an inch, thats metric innit?
CLEM
and no I am not re-sorting my box of shims to that foreign funny sizing chart or buying a new micrometer and feeler gauges.
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No need to re-sort, Clem.

Ditch those old hard-to-read analog instruments and replace with digitals. Many these days have huge digits in their displays, saves you searching for your specs as well! They also have a button that allows you to switch from football fields to millimetres for a quick conversion. Maybe you'll eventually even get the hang of metrics! ;)

piet
 
sfcpiet said:
No need to re-sort, Clem.

Ditch those old hard-to-read analog instruments and replace with digitals. Many these days have huge digits in their displays, saves you searching for your specs as well! They also have a button that allows you to switch from football fields to millimetres for a quick conversion. Maybe you'll eventually even get the hang of metrics! ;)

piet
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I just love imperial units. Acceleration in furlongs per fortnight squared ..🤣🤣🤣
 
CLEMTOG said:
welll...................thousandths of an inch is sort of metric, if you ignore the inch bit, (12 to a foot, 3 feet to a yard) I mean there is a thousand of little tiddly bits, hundreds of medium bits, and tens of quite big bits, a tenth of an inch, thats metric innit?
CLEM
and no I am not re-sorting my box of shims to that foreign funny sizing chart or buying a new micrometer and feeler gauges.
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It interesting how when the Imperial measurement world wanted higher accuracy they moved from fractions of the unit to decimals. From carpentry to the machine shop. But stopped short of converting the whole system.
 
When I was an Apprentice the surveyors used 10ths of Feet instead of inches so they could use Trigonometry, bit hard to do trig on base 12.
 
Vince said:
When I was an Apprentice the surveyors used 10ths of Feet instead of inches so they could use Trigonometry, bit hard to do trig on base 12.
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My good friend from school is a surveyor and I remember him telling me this too. I thought it was odd at the time, but you have explained why.
 
sfcpiet said:
No need to re-sort, Clem.

Ditch those old hard-to-read analog instruments and replace with digitals. Many these days have huge digits in their displays, saves you searching for your specs as well! They also have a button that allows you to switch from football fields to millimetres for a quick conversion. Maybe you'll eventually even get the hang of metrics! ;)

piet
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I for one find reading vernier calibration difficult even with glasses, digital is far superior ( swap between metric / imperial at the press of a button) - digital calipers are a game changer. Don’t know about elsewhere but in UK all engineers use thou- if I give metric measurements first thing they do is convert it back to thou.
 
I was taught to read a Mic in 1st Form High School Metalwork class and forgot 5 minutes later. Digital is so easy.
 
I think I remember this bike being advertised on Ebay ........... If it is the one I`m thinking of , then I remember staring at it for about ten minutes , and then deciding the colour wasn`t that important anyway ...............

What follows is going to be of no help whatsoever ..... but I`ll say it all the same .........

If it was me , the last thing I would do is give it to someone else to " fix" ........

If you want something doing properly , then do it yourself .......
If you`re not sure of what to do , then find out and have a go .......
Carb slides all over the place ? ...... If that`s the case then get them sorted ............
Things need checking ? .... Then measure and adjust them yourself ......

I know you have already renewed or replaced various items ...... but it doesn`t seemed to have helped much ..... and I wouldn`t really have much faith in anyone else doing any better ........ I may be completely wrong regarding this , but that would just be the way I would feel ..........

The only person with a vested interest in getting the bike running properly is you ......... anyone else will just want payment in exchange for delays ...... and a complete lack of interest in spending more time on it when they find they are unable to cure the problems ........

I see that you have had to unbend and adjust various things contained in the carbs ..... but then ran out of adjustment ........ which doesn`t bode very well for the carbs correct operation to me .......... Likewise the ignition .... try something else ...... fit the Witt DMC , if you can still get them ..... and make sure the pickup plate wiring is sound .

And do all this yourself ....... don`t trust anyone else to do it ........It`s the only way to be sure it has been done properly ..........

Also dump the K & N`s ....... better off without them .............. Or run the proper airbox ............ with or without it`s filter installed , it doesn`t make much difference ............ ( the only thing the filter really does is give it greater structural integrity ) .........

Horrors you have come across , like split grub screw , should , as you have done , be thrown away as far as possible , and be replaced with something which works ....... It sounds like the sort of bike that needs a thorough and methodical examination of every one of it`s component parts ........

Obviously if it`s something like valve guide replacement , or main bearings rumbling , then that`s a different thing altogether , and you will need outside help ...... but otherwise ....................

As I said ..... not much help really ........ but if it were me , as long as the bottom end was ok , then it` sounds like just the sort of thing I would enjoy trying to sort out ......... I realise it`s been an uphill slog , but nothing`s impossible , and if you are prepared to get stuck in and do as much of the work you can yourself , then that will help minimise any likely costs which may be involved .

The way I would approach this would be to gain as much knowledge about every aspect of the triple as you can ........ carbs : possible ignition solutions : the operation and correct timing of all the moving parts ........... and then apply that knowledge in a systematic manner in the hope it will resolve all the problems you have ............

........ Knowledge is power .............. :) .................

If all this sounds a bit pompous , I apologise , it wasn`t meant to be .......... I guess I just miss the Mirage ........... :cry: ....................


( Sorry BlackJota , edited a bit since you liked )
 
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