How to Service Mongoose Fat Bike Headset


hey you guys welcome back to the
Mongoose miniseries this will be episode number two in this episode we’re going
to be discussing the head set on this Mongoose fat but now just like the
bottom bracket that we discussed in episode 1 the headset can suffers from
the exact same problems under lubrication and over tightening
especially when it’s new from the factory okay so if you just ordered the
bike and it came in a box you’re gonna be in great shape because the bars in
the front wheel are already going to be removed however if you bought it at the
store and it was already preassembled you’re gonna have to pull the wheel off
and the bars off before we can go through and do this projects well let’s
get those off right now now to get the wheel off you’re gonna be a 15
millimeter either socket wrench or regular wrench and for the bars you’re
gonna need a five millimeter allen key so let’s get the wheel off and you guys
will notice I’ve actually got the stabilized on this jack stand if you
don’t have one a block of wood or work just fine a cinder block whatever you
got that’ll hold the bike up and steady now let’s get the wheel off and past the
caliper it takes a little wiggle but once you get it off no problem and now
to pull the bars off you’re going to need your five millimeter allen I’ve
already loosened most of these bolts so they won’t be too hard to get out okay
so there you have it so the front of the stem comes off with those four bolts and
then the bars come off and these are just gonna hang loose now if you’re
going through and replacing the headset it may be worth your time to take the
caliper off I’m actually going to be painting the bike so the calipers got to
come off anyways so I’ll be taking that off and I’ll be taking the rest of the
stuff off particularly because I’m also replacing these bars alright next step
super easy we’re gonna pull the fork off and that’s probably the easiest thing
you can do to a bike as far as it goes all you’ve got to do is remove the stem
and all you’re going to need is a five millimeter allen what you’ll do is take
the two side bolts out of the stem and these clamp it on to the fork and you
don’t have to take them off just take them loose and once the stem is loose
like that you should be good to get the fork out take this top pull take it all
the way out it’s gonna have to come completely out
once that out hold on to your fork so it doesn’t drop take your stem ah take your
spacers and then drop the fork out super easy alright so at this point if you’re
looking to go back through we greased the original bearings and put the fork
back in without changing your headset I’d like to direct you over to my recent
video on headset repairs that’s going to give you a nice tutorial on how to do
everything go through and grease it and reassemble it I’ll put a link to that
right here now if you’re hanging out and you actually want to see how to remove
the headset so that you can go through an upgrade I’m gonna show you how so the
nice thing about this is I am not worried about these cups at all I’m
gonna be completely replacing everything so I’m just gonna use a hammer and a
long screwdriver to knock them out if for whatever reason you want to conserve
them or try to prevent from any sort of damage to the cups I strongly suggest
actually getting a cup removal tool and I’ll throw that down in the description
as far as taking them out it’s really easy you take your long flathead
screwdriver you stick it down until it hits the cup and then I hold pressure
against the front this got a good tap and you’re gonna have to work back and
forth eventually just like that to do the top all you’re gonna do is flip the
bike over and do the exact same thing all right so let’s talk a second for
upgraded headsets so you guys can get an understanding of what we’re looking at
so right here you’ve got the original headset and right here you’ve got my new
FSA Pig headset now what I want to show you particularly this is the lower Cup
from the original and this is the original bearing now look at the new Cup
by comparison that thing is a tank and when you look at the ball bearings
you’ll see these are massive by comparison and these things can take an
absolute pounding without giving up now the top cups are actually roughly the
same size this one’s actually a little bit taller but the bearings are also
roughly the same size and that’s because the lower bearing tends to take the
brunt of the damage whenever you have a hard hit or a really hard jolt to the
front as far as installing these we’re gonna need to either utilize a headset
cup press or you’re gonna need to make a special tool just like I have as far as
the tool that I’ve made I used an old 2 by 4 with a 3 I got this piece of metal
it’s actually a cap for a electrical junction box and I drilled a 3/8 hole in
that we got a 3/8 rod to 3/8 nuts and to 3/8 washers and I’ll show you how to
utilize this while it’s on the bike itself as far as installing the headset
cup it’s really easy so you take your rod with the piece of metal already
threaded onto it you put your cup up there just to let touches the metal and
you set it down through your head tube and I just kind of get it to where it’s
sort of aligned and you take your block of wood and your other nut and washer
and you put those on the other side you put the rod through hold it in place and just put on your
washer and your nut okay so once you’re at this point what you want to do is you
want to set it to where it’s going to be just about perfectly centered and going
straight down with the tube and just tighten it down a little bit that stays
in place you’re gonna take two wrenches and you’re just gonna tighten down the
nuts and they’re gonna pull the cup into the heads heads or head to here once
you’ve got these tightened all the way down and the cups all the way installed
you can flip it over and do the other side now I’m not going to go any further
because I’m actually gonna be painting the bike before I do this so I don’t
want to have to knock that headset out too many times it’s a super easy process
to install a new upgraded headset once you’ve got it installed the only things
you have left are to grease them and to reinstall your fork and stem and just
put everything back together if you don’t know how to do that please go
check out my video on headset repair it’ll show you everything you need to
know to go back together as far as the mini series goes this is our second
episode I’ll be coming to you with a third soon outlining the hubs on this
bike and showing you how to make that paint booth so make sure you hit that
subscribe button go ahead and give it a thumbs up and if you got any questions
or comments throw them down in that comment section thanks again

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