hi i'm paul brodie we're back in the shop i'm the fabricating guy on this side of
the camera there's a guy on the other side of the camera and his name is mitch
so we just finished up a three-part series where we made the ignition mount on the cub and that was
a lot of work so i need an easy afternoon so we got a easy project actually we've got a few things
we can do and i'm going to make a velocity stack for this anal carburetor it's sort of like if a
woman goes on a date she wants to choose the dress she wears or whatever when i go riding on the cub
i'd like to be able to choose an air filter or a velocity stack so we're going to do that
a couple days ago i made a new intake system a new a new manifold we're going to call it a
manifold even though manifold is more than one i know we we've had comments about that this is the
first one this was the second one now we're on the third one because this is a different head
the spacing is different so this is the final one i i feel and we're also gonna once once we've got
a velocity stack made how long can that take right we got a a crank we're gonna take apart it's a a
tiger cub crank that's been really thrashed and some of the viewers wanted to look inside so
let's get started we're going to go to the lathe and we're going to make a big hole to start with
i'm going to see if i can make a velocity stack in 45 minutes we don't know if that's possible yet
i know i can buy a velocity stack but what fun is that
anyone can do that as long as they're in stock i want something a little bit
custom here so okay we're going to make the velocity stack about that long okay so
red felt pen mocks the drill
we have to set up the threading now and
that's my threading tool internal internal carbide threading tool so
i need to steal a holder from somewhere what am i going to use i'm only short two holders
that's all so if you're working on a lathe you look for the 24 so here we are we're on
c6 see that there's the 24 c6 so this is a b c d e so we want the c we put it on sometimes
you have to move the chuck to get this to there we go c and then here we're on we've got eight
we need it on the six so there we go we got c6 we switch this over for threading this is
for turning that's the feed this is threading we don't have to change any gears we change the feed
and we'll we'll use a felt pen red felt pen and we'll take a very small cut
and then we'll use the thread gauge on the marks made into the felt pin surface because you always
want to check to make sure you didn't screw up okay so i set that to zero so when this comes in
that's where i stop right there so i'll set this at zero i want to go in 350. so each one is
100 and eighth of an inch 125.125 so that's an eighth
and that's a quarter and then we go 100 thou more so that's basically so when i go to the zero
in there i've gone in 350 thou that's the thread that i want
can you see here what we're doing is we're checking
you have to get the light right and that looks okay to me so we're gonna go with that
okay see the end of the the cross feed i'm making a mark there with a felt pin
so that i know i know where my dial is and so if i'm out of turn i can see it
because that red felt pin has to line up with the end of that
it's just a little trick okay we're gonna take uh one more cut and then we're gonna check it
okay so it's starting to engage but
it's tight
now i know i'm at about about the right spot
oh that's a big cut
the threading is the trick
okay we have it we have a thread look at that almost no well no there's no slop
okay
um
i'm going to use a tool that i just made where did that tool go there it is see it's got a
rounded corner but see this one here it's going to hit on the inside see how shallow this is so
it's kind of the same shape more or less but this one gets in more so that's what we're going to use
i got a scraper a triangular scraper so i'm going to use i'm going to use an edge to round this
um
okay
it only took 55 minutes so say an hour from start to finish
anyway let's go do something else we're going to take a pot of flywheel now so let's go
back to the bench and i'll show you what's going on i think that turned out okay
so just on a on a side note i have a folder and inside here i've got all my invoices
for what i've spent on the cub and i got pages listing everything so my survey of the year is
when you work on a motorcycle do you keep a track of the cost i asked a few of my friends and as
soon as i asked the question a few of them said no i never look at my invoices i never add it up so
let me know if you add it up or you don't add it up let's do some kind of an informal survey here
so we're going to work on this now remember this from
a week ago or something like that someone wanted me to take it apart so i think that's a good idea
what we have to do is to make up a press plate can you see this here
this is what has to go on through there around the around the connecting rod
so that we can hold it in the press so we've got a hole saw we're going to go to the mill
you can use a band saw just to cut this out a little bit and then we'll we're going to use the
arbor press i think because this is cracked so it's not going to be holding super super firmly
can you see the crack there that's how much abuse this little tiger cup went through so
yep
okay we got this set up here we're going to press on the pin
so we'll see how much pressure it takes see if my little arbor press there we go
look at that because it's cracked otherwise this would take a lot more force
all right
let's do an autopsy and see what's going on here so it looks to me like
like the rod has sort of survived but all the bearings they're supposed to be
roller bearings in here and there is there's part of a bearing race here
anyway there's basically
there's some kind of a bearing in there and the bearing is gone
so that's that's what we're left with anyway for those of you that
wanted to see this there it is there's the inside of a tiger cub flywheel assembly
i have a tiger cub frame here obviously because of the weird shape here this is the one that i had
a problem with there was my fault and i i kind of have destroyed the frame a bit this casting
here is split and that's a very hard thing to fix because it's because on the tube here i'll
call this the seat tube it's brazed in between this log and this lug so how you take that out
i don't know why i'm telling you this is because i got contacted by someone a couple days ago and
he's in england and he has an extra frame and he told me that he would cut out this piece here
and he would give it to me for free if i want to pay the postage well that's very nice but if i'm
going to fix this frame what i'm going to do is i'm going to hack sort right here and right
here and then on the other frame i would get that piece and i would put a sleeve an internal sleeve
and i would do it that way and the reason that i want to save this frame is because it's got
a serial number and i have the registration for this otherwise it's just a piece of steel so what
we're going to do is to hack saw this and this and then i'll know how much that weighs and the
size of the box and then we can get an estimate for shipping so let's do a little hacksaw here
every time i pick up a hacksaw now or think about a hacksaw i think of this guy called alan milliard
i know you've heard of him and so alan this first cuts it's to you okay got a brand new blade
so we'll see what we can do here see if i can make a straight cut
there you go so it's sprung a little bit there we go
good catch paul did you i know you got that mitch look at him
he's got a huge grin on his face so anyway that's what we need i'm gonna
figure out the weight and all that and maybe one will come from england
wow well that was a fun afternoon i hope you enjoyed being in the shop here with us
it's good having you along mitch and i like coffee if you buy us some
coffees i'll be most appreciated we'll see you next week take care