let's just experiment see what happens
that's not good at all i don't know hi i'm paul brodie in my shop again mitch me filming making
what's new well i got some packages from england this one has size stand spring in it it's nice and
brand new very nice and then i got another package from england and it's got some other stuff in it
these are fork nuts that go on the top of the forks and these are quite nice quite nicely made
so i was really hoping that with all the pots i got we can do some assembly soon and
they sent me oil seals for the forks and
this is the bag that came in i also ordered some 3 8 nuts these are our bsf i believe and these
nuts whoever packaged them had the nuts inside the oil rings and these have all sharp corners
on them so it's like that wasn't a good idea at all and then i'm looking at the fork seals and
i was taught always to save the old part so can you can you tell that it's not going to work is it
so anyway i sent an email off to england and uh ordered the right ones
these aren't a whole lot of money but it says right on the invoice
fork seals so i don't know what happened there anyway that's what's new and we are working on the
on the sander head fixture because we're going to fix the exhaust port so last time last episode we
made the fixture and we switched on the lathe and it's really out of balance so that's the
first step is to add a counterbalance here is the fixture we made last episode and we got
the head mounted it's not running true but you can see how how the boring bar is going to be
used in there so i'm just going to switch it on for a moment this is not high speed this is like
medium speed and i want you to watch well it's going to vibrate things are going to move
you can see i think you can see how the whole lathe is moving so what we're going to do
this is obviously the heavy spot because this is on the bottom it's off center so we're going to
do something like this i took a piece of half inch half inch flat bar you see i've marked three holes
they're not drilled yet that is going to get welded on there and then i got some metal here
and i can bolt it on and i can change position of the holes
we're just going to experiment see what happens okay
this is all offset from the center so i'm putting this over i'm going to weld that
on right right there so it's offset this way a bit because this offset will offset
the offset over here i'll tack it then i'm going to put my gloves on i promise
so
okay we have added on this piece here so this in itself is a counterweight
i'm going to switch on the lathe let's just see how the shake factor is again
okay so yeah it's still shaking so we're gonna add this guy this is the i'll just grab these out of
a box why don't we try this one in the farthest position
this is basically r d where you're figuring stuff out in the bicycle company that i used to work at
at broady research i get mail quite often and they'd say i'd like to apply to your r
d department i mean and i'd say oh you want my job do you so of course no one ever got hired for r d
because i have to keep something for myself all right so that goes around so here's another
here's another shot let's see
well that was one count of weight let's try the other one
no it's not good what i did when i was working on the excelsior heads and i
and i had to balance them i i have a long bar and i have a wheel balancing stand and i put it on
on the wheel balancing stand and and because the bearings are so
low friction it automatically goes and that's how i use the balance so maybe we have to do that here
this is what i use for excelsior flywheels when i'm i've got to balance them
so that's more or less the middle i know we're going to use the four jaw chuck and
move this over but this will get it this will show us basically how out of balance it is
see how these have almost no no friction in them whatsoever so silly me i was adding i'm
adding weight here and i should be adding weight here can you see that
let's just see something let's just see what happens if that went like that
okay so let's see what happens
that's not bad
so i think what i'm going to do is i'm going to weld i'm going to weld this piece on but first
of all i'm going to drill a hole through here so that i can add on a counterweight if i want
okay that's not gonna fall off now
okay this is this is test run number five i don't know okay here we go
so we'll take this out put on the four jaw chuck and we'll take it from there okay checking balance
so let's see what happens see how it cuts if there's vibration
what i wanted to show you here that on the exhaust port or intake port it's always about
the flow can you see all this see the whole way around in this there's a huge gap very bad
so when we make an insert we want the insert to go right up to that shoulder
so that there's just a nice smooth flow of the exhaust gas so let's see what we can do now
that's what's left of the tube that came out quite nicely that's what i was machining and i
knew that at some point it would break through so on our channel we have had a breakthrough
so what i need to do now i need to bore this out until it's nice new metal then we have to make the
thread see the old felt pen trick
this this tells you where it's cutting now
okay i think we're just gonna leave that like it is i'm gonna take this out of here i'm gonna
leave this in the four jaw so i'm gonna i'm gonna take this whole this whole assembly out
i'm going to put in the free drawer i'm going to board this out
to the same size as this and then i'm going to cut a thread in here
and then i'm going to cut the same thread in here because when i make the insert it's a lot easier
to see if this fits on like a nut as opposed to holding a cylinder head and trying to get it
at the right angle and everything so we're going to make a thread into this piece next
there we go look at that it's the whole assembly just come off
okay so one thou bigger that's okay usually the thread depth is uh
maybe twenty thou maybe a little bit more than twenty thousand so this is thirty six thousand
largest so that means that the thread depth would be 18 thou because it'd be half that so
this might work but might not okay we're going to cut some threads when you cut a thread you always
check so see what i'm doing here i'm putting felt pen inside there so first what i do is to
switch on the lathe and i i touch the tool because then i can i can zero it or i can put the dial to
whatever number i want so we're going to take a very small cut and then i'll get my thread gauge
and then we'll actually check it that's what the red felt pen is for so here we go
i'm checking my thread here
and 20 threads per inch matches my gauge okay let's make a thread
uh
we don't need this anymore doesn't come out of the three jaw
we'll take off the three job put the four jaw back in and we'll cut a thread in the exhaust port
what we're going to do is to is is to take this out and cut a thread
and see what what happens when i cut a thread there and then if that works
then i can i can machine this to something like that so
let's see what happens i don't know
this is why i wanted this can you imagine
i'd have to pull this all back and then try and fit the head on that's why i wanted this
so look at that it goes on
a bit
now we have to see if the head fits
this is the big test to see if the if the head fits so
oh look at that
see that see that little bit of slop that's fine okay
that's our episode for today i hope you enjoyed it watching it
mitt tells me he's got to go because he's out of film i don't know if i believe him or not but
thank you for watching we appreciate it very much mitch and i like coffee if you buy us
coffees that would be great fuels our channel see you next time bye