850 Destruction

[alanfavell]

i just use a large syringe

+1

[bjorge]

My problem is, I always forget about this little problem...until bleeding time  orry: Then impatience takes charge......

[dablik]

Engine's in

[attachment=o12866]

 

With the rotor and clutch all torqued up

[attachment=o12867]

[attachment=o12868]

 

Boogering with the timing

[attachment=o12870]

[attachment=o12871]

 

Nicely lined up BUT after installing the CCT and turning twice the bugger is a tooth out on the Inlet side.

[attachment=o12874]

 

The camera angle is a bit off but it's defo a tooth out, seems to be skipping a tooth, reset the cams 3 times now with the same result so a bit stymied with it......packed it all away for today cos now it's starting to annoy..

 

I know she'll fire up a tooth out but would like it right really, oil tank also plumbed in so will oil her up soon and check for leaks, fingers crossed..

This post was last modified: 27-03-2020, 04:57 PM by dablik.

[dapleb]

Cool dabbers. Difficult to tell from camera angle. Not seen Juan that dont look a bit wonk...but not easy to see if it is too wonk in pic! I am sure I have put up pics before...if ya can find Juan to use for comparison.



Else....stick with her idea of inlet and outlet sprocks combined into one large external nylon cog. ;0)



Edit: is that a gnu chain dabbers?



What's all that black sheet on buckets? ;0)

This post was last modified: 27-03-2020, 05:06 PM by dapleb.

[alanfavell]

Oooohhh I could watch him all day without rest  :good:

You not working at work work then Cliff?

 

I'm in next wed = 1 April  for the day, but not in again until.................... wait for it..............Fri 15 May.

[dablik]

Cool dabbers. Difficult to tell from camera angle. Not seen Juan that dont look a bit wonk...but not easy to see if it is too wonk in pic! I am sure I have put up pics before...if ya can find Juan to use for comparison.



Else....stick with her idea of inlet and outlet sprocks combined into one large external nylon cog. ;0)



Edit: is that a gnu chain dabbers?



What's all that black sheet on buckets? ;0)

Defo off a tooth daps, not a slight wonk which would be fine, and the chain i'm told was new shortly before i acquired the bike, have a different cyl head on but cant see that being an issue, will redo it again and see what's wot, if i need to i'll pull the chain, and the black shoite is Graphogen..

[dablik]

Oooohhh I could watch him all day without rest  :good:

You not working at work work then Cliff?

 

I'm in next wed = 1 April  for the day, but not in again until.................... wait for it..............Fri 15 May.

Aye matey i'm in work, days off at the mo.......all leave for April cancelled and i suspect May will follow, wards been half empty this week, which is unheard off, discharges night and day in preparation, already been dealing with Covid patients and expect i'll be virused up at some point.... as the news enough supplies not reaching every ward in Hospital so i hope that improves.

28 beds declared "White" on my ward which means no Covid patients now as they have been segregated but the last 8 beds through 2 sets of double doors are "Green" beds which indicates tested neg-ve..........although it's been known to have some false neg results with the current swab test :unsure2:

In weeks to come i can see that status changing as the need for more beds arises.. it's going to be manic i reckon but while i'm able i'll be in work fighting the fight :good:

 

Be safe everyone...

[Studley Ramrod]

You too mucka. :good:

 

Bikes taking shape and lookng good, sure you'll get the timing sorted.  Another pair of hands might help you out there, or maybe try zip tieing the chain and cogs afore inserting the tensioner.

[dablik]

You too mucka. :good:

 

Bikes taking shape and lookng good, sure you'll get the timing sorted.  Another pair of hands might help you out there, or maybe try zip tieing the chain and cogs afore inserting the tensioner.

Yea i'm gonna zip em up from scratch, i zip tied the exhaust when moving the Inlet a tooth but i reckon double handcuffs might be called for..

This post was last modified: 27-03-2020, 07:24 PM by dablik.

[wicklamulla]

man the

 

Defo off a tooth daps, not a slight wonk which would be fine, and the chain i'm told was new shortly before i acquired the bike, have a different cyl head on but cant see that being an issue, will redo it again and see what's wot, if i need to i'll pull the chain, and the black shoite is Graphogen..

 

 

she's gonna be a looker.

[dablik]

Okay before i go and reset the timing again a question...

 

As a parallel twin both pistons are at TDC but they have a slight overlap and when measured the difference is minimal (3-4mm) intake/exhaust stroke and i have set cylinder one at TDC as the higher piston, so is it on the right stroke or should i turn the crankshaft 360 so cylinder 2's piston is higher and put the cam lobes facing outwards on cylinder 1 as normal....

[Studley Ramrod]

No1 at TDC, crank set to 'I' mark with cam lobes facing outwards.  Cam marks on end of cam should also line up.

[dablik]

No1 at TDC, crank set to 'I' mark with cam lobes facing outwards.  Cam marks on end of cam should also line up.

Yep i know the orientation mucka cheers, but as above re the pistons, one is elevated a tad higher than the other, a little overlap from inlet stroke to exhaust stroke i assume so what i'm asking is should number 1 cylinder be the higher or lower piston for the correct stroke, or does it not matter at all ?

[Snowbird]

Are you saying the pistons are not at the same level? I'm assuming this is on a 3VD before the 270 crank so they should be exactly the same surely, are the rods on the right way round? they may have a slight offset which could cause that if one is the wrong way round.

I've never had one of these apart so guessing here.

Or am I piddling up the wrong tree altogether?

 

 

it's going to be manic i reckon but while i'm able i'll be in work fighting the fight

And for that bit I'm sure we all salute you! Good luck and good health!

This post was last modified: 28-03-2020, 07:24 PM by Snowbird.

[Studley Ramrod]

Yep i know the orientation mucka cheers, but as above re the pistons, one is elevated a tad higher than the other, a little overlap from inlet stroke to exhaust stroke i assume so what i'm asking is should number 1 cylinder be the higher or lower piston for the correct stroke, or does it not matter at all ?

I would go with your setting, No.1 piston at the highest point, as it would then be TDC. 

[dablik]

Are you saying the pistons are not at the same level? I'm assuming this is on a 3VD before the 270 crank so they should be exactly the same surely, are the rods on the right way round? they may have a slight offset which could cause that if one is the wrong way round.

I've never had one of these apart so guessing here.

Or am I piddling up the wrong tree altogether?

 

And for that bit I'm sure we all salute you! Good luck and good health!

No your bang on with your thinking.... i measured the height cos over winter was researching a little on this subject and i think a "Triumph" forum mentioned overlap which of course got the grey cells thinking, it is a 3vd and i think you are correct the pistons should be the same height, any overlap must be very minimal, initially i measured using a long pencil in the plug hole when the camshafts were out, today i re-measured before removing the valve cover with a much flatter surface to rest me marker pen on and the heights are identical, so cheers your comment got me checking them again and i have to admit to user error......again plus the rods were clearly marked when fitted so confident i got that right, salute appreciated sir, many thanks..

 

All reset again today and cable tied together while fitting the CCT, you cant see to clearly in the pic but it's correct

[attachment=o12883]

 

A full turn of the crankshaft now put's the exhaust cam out a tooth, i'm pretty sure in the past ive set it a tooth out so on a revolution of the crank it's all lined up....cant remember it was so long ago !! so will have at it again next i'm off.. no rush as wont be able to ride it anyhoo...

I would go with your setting, No.1 piston at the highest point, as it would then be TDC. 

Cheers done that but looks like me measurement was a doodoo   who'd a thunk it eh..

[Snowbird]

I thought it sounded strange to have different piston heights unless with a couple of thou.

The CCT is at the back so you need the chain run tight at the front when setting and any slack at the back where the CCT will take it up, I wonder if the chain is dropping off the crank to let it go out.

An old CCT with ratchet mech removed would make it easier to keep some tension on the chain while setting but still let you pull a bit of spare up.

[Studley Ramrod]

No your bang on with your thinking.... i measured the height cos over winter was researching a little on this subject and i think a "Triumph" forum mentioned overlap which of course got the grey cells thinking, it is a 3vd and i think you are correct the pistons should be the same height, any overlap must be very minimal, initially i measured using a long pencil in the plug hole when the camshafts were out, today i re-measured before removing the valve cover with a much flatter surface to rest me marker pen on and the heights are identical, so cheers your comment got me checking them again and i have to admit to user error......again plus the rods were clearly marked when fitted so confident i got that right, salute appreciated sir, many thanks..

 

All reset again today and cable tied together while fitting the CCT, you cant see to clearly in the pic but it's correct

20200329_123017.jpg

 

A full turn of the crankshaft now put's the exhaust cam out a tooth, i'm pretty sure in the past ive set it a tooth out so on a revolution of the crank it's all lined up....cant remember it was so long ago !! so will have at it again next i'm off.. no rush as wont be able to ride it anyhoo...



Cheers done that but looks like me measurement was a doodoo
  who'd a thunk it eh..

I was being very cautious not to mention it in my posts.



EDIT:  Have you tried turning the crank another 360 to see if the cam timing lines up ?  Just wondering if the chain might have some stretch ?

[dablik]

It's not my 1st time doing this job, although quite awhile ago now since i last did it but, got the exhaust cam on tight and tied with a cable tie before setting the Inlet cam which was then also secured with a cable tie before torquing the cam caps and fitting the CCT, it's also not unusual for all TDM's to be off slightly on the timing ie a bit wonky but i'm not happy with a whole tooth out, the CCT appears to be working fine without a problem but i might see if i cant make up a manual to try..

 

Not actually having a problem to get tension on the chain and set the timing marks, looks like i'm getting a slip on rotation maybe...so wot i'll do next is set up the timing a tooth out and see where that takes me on rotation of the crankshaft...

I was being very cautious not to mention it in my posts.



EDIT:  Have you tried turning the crank another 360 to see if the cam timing lines up ?  Just wondering if the chain mght have some stretch ?

Yea i've given it another 360 for that reason then another 2 rotations and the ex cam is still a tooth out so it looks like the cam is slipping a tooth but then staying static at the mark, so as above i'll set it a tooth out and check on rotation if it lines up and stays, sure i've done it that way in the past....

 

Edit... well if i cant fix as above then i'll pull the chain for a measure, but it's said to of been replaced shortly before i got the bike and to be honest i'm pretty sure on the original cylinder head it was okay, even with a slight wonk..

 

This post was last modified: 29-03-2020, 03:54 PM by dablik.

[Studley Ramrod]

It's a fookin' pain eh.  Been there myself a few times.