Projects At Home During Lockdown

[Kickaha]

I've been waiting for a fuel pump for a 851 from the US for a month now.
That valve didn't like unleaded. It's been spot welding itself to the seat & pulling a chunk out next time it opens.

Seats don't look too bad though although I did clean up the right side a bit, there's no pitting like on the valves, what's your advice,lapping the new valves in by hand or better off getting the seats recut by an engineering shop

[sidecar bob]

If it was for a FZR they would have sent it straight away. But for the Dookaatie they age them for a bit on the dispatch shelf to give the customers the exotic bike 'experience '.

I've actually ordered a BMW K100 one for it. Same thing & your theory still works.

[sidecar bob]

Seats don't look too bad though although I did clean up the right side a bit, there's no pitting like on the valves, what's your advice,lapping the new valves in by hand or better off getting the seats recut by an engineering shop

Best to get the seats cut & check the seal with bearing blue or assemble them in & check with petrol down the ports.
Lapping with grinding paste may make you feel better, but if it's not making a good mechanical seal, lapping won't fix it & destroys the machined sealing surface.
That left hand exhaust seat really won't take to lapping at all.
Probably nothing you do will prevent it from being a pile of Pommy shit at the end though.

[JimO]

painted the front of the hovel today..i could do with a couple more weeks lockdown, get the old dump finished.........

[sidecar bob]

painted the front of the hovel today..i could do with a couple more weeks lockdown, get the old dump finished.........

You have paint?

[Kickaha]

Best to get the seats cut & check the seal with bearing blue or assemble them in & check with petrol down the ports.
Lapping with grinding paste may make you feel better, but if it's not making a good mechanical seal, lapping won't fix it & destroys the machined sealing surface.
That left hand exhaust seat really won't take to lapping at all.
Probably nothing you do will prevent it from being a pile of Pommy shit at the end though.

I thought that might be the case, ah well another few weeks then

[F5 Dave]

Well the continuous lapping may make you less frustrated by lack of tinder dates currently.

[JimO]

You have paint?

we were about to start a big reno so had paint, underfloor insulation, oak flooring, 6 windows and a big door, tiles all ready to go, had scaffold organised but the bustards never turned up prior to lockdown and the joiners hadnt finished the new kitchen units.........so we have worked full time on the house, it helps that im a tiler and my son who is currently living here is a builder

[jellywrestler]

Well the continuous lapping may make you less frustrated by lack of tinder dates currently.

your autocorrect changed grinder to tinder, sort it out

[jellywrestler]

had scaffold organised but the bustards never turned up prior to lockdown

wonder how many building sites are held up with expired scaffolding certificates?

[Grumph]

Seats don't look too bad though although I did clean up the right side a bit, there's no pitting like on the valves, what's your advice,lapping the new valves in by hand or better off getting the seats recut by an engineering shop

Ok, I already know no-one's going to pay attention to this - but...

That head came to me assembled by the reconditioners. It's apparent to me that at least one exhaust valve has been refaced too far - and got into the soft material of the valve head.
Not an uncommon scenario with these old shitters.
The seats may well be OK. They were probably recut at the time. They're much harder than the valves. I'd clean up the dirty one with a wire brush in the drill to at least get a better look at it.
Easy enough to put a bit of blue - or permanent marker - on the valve and ruib it on the seat to see what the trace looks like.

I have two questions.

In the time you've had it running post engine build, did you check the valve clearances at all ?

And how did a fork strip lead to pulling the head off ?

[F5 Dave]

we were about to start a big reno so had paint, underfloor insulation, oak flooring, 6 windows and a big door, tiles all ready to go, had scaffold organised but the bustards never turned up prior to lockdown and the joiners hadnt finished the new kitchen units.........so we have worked full time on the house, it helps that im a tiler and my son who is currently living here is a builder

Appreciation of how long tiling takes. This has been quite a few weekends.

Pretty happy but need a router block of timber to make clearance for sliding door to swing shower door sitting in entrance way.

Ahh fuck. Which way was I holding the tablet. Give me a minute

Ok try this.

Cubbyhole niche needs tiling with some pattern when shop in Alicetown opens up again.

[sidecar bob]

Ok, I already know no-one's going to pay attention to this - but...

That head came to me assembled by the reconditioners. It's apparent to me that at least one exhaust valve has been refaced too far - and got into the soft material of the valve head.
Not an uncommon scenario with these old shitters.
The seats may well be OK. They were probably recut at the time. They're much harder than the valves. I'd clean up the dirty one with a wire brush in the drill to at least get a better look at it.
Easy enough to put a bit of blue - or permanent marker - on the valve and ruib it on the seat to see what the trace looks like.

I have two questions.

In the time you've had it running post engine build, did you check the valve clearances at all ?

And how did a fork strip lead to pulling the head off ?

The left exhaust valve has been too tight hasn't it?

[Kickaha]

I have two questions.

In the time you've had it running post engine build, did you check the valve clearances at all ?

And how did a fork strip lead to pulling the head off ?

Yes I did, I checked them as it became harder to start, they were about 4 thou to tight, it would have done maybe 3k since the rebuild at that stage

The head come off first after I did a compression check and the left cylinder had about 1/2 the compression of the right hand side, this was probably about 1k later

I then took the front wheel out to sort how I would fit the TLS, because the forks are so shit I thought I'd check fork oil and then I wanted to try my fork seal holder tool as well and see how primitive the forks are, the answer being really fucking primitive to the point of not even having damper rods in them

So now I have to decide whether to do the Dow two way damper conversion, something like emulators or a cartridge conversion all with increasing amounts of cost, either way they wont be going back together as is

[husaberg]

The left exhaust valve has been too tight hasn't it?

I thought he meant it might have eaten through the hard and had opened up the clearances......
but looked dirty rather than hot