Disclaimer
This
article concerns making modifications to a bike's braking system. Due
to the potential hazards, do not attempt this unless you are
mechanically competent in carrying out the work safely. I'm posting
this in an advisory rather than instructional capacity, so any work
you carry out is at your own risk.
********
Turning now to the
front caliper which I believe is similar or the same as that fitted
to some Hondas including versions of the CBR 600. This isn't very
powerful, the lighter CBR 600 used two of the calipers, but can be
upgraded. When I bought mine the front brake was a bit sticky, so I
stripped it down and replaced the seals and pistons with stainless
replacements.
Link to Ebay listing
It's also worthwhile
replacing the locating pin with a stainless one to prevent grief
later.
Link to supplier
For some weird reason,
although the front caliper banjo bolt has a metric thread it has an
inch head. I had to buy a 9/16” socket to remove it, stupid stuff
like this annoys me so I replaced it with a metric stainless Allen
headed bolt.
Once I'd stripped and
rebuilt my caliper the braking was better, but still pretty poor.
There are a couple of ways you can upgrade the brakes to improve
braking.
Firstly, the expensive
route. There are a number of replacement calipers that are a straight
bolt on.
Link
link
Link
Both of the above
suppliers also sell floating replacement discs. (more about that
later.)
Note: there may be other brake upgrades, if you discover any let me know and I'll add them.
A cheaper alternative
is using a different Nissin caliper, these are available used and can
be fitted with some modification.
Before going any
further, read the Disclaimer at the top of this page and these
following articles:
Link 1
Link 2
Link 3
Link 4
Firstly, find a
suitable 3 piston left hand side Nissin caliper as fitted to a number
of Honda models. List from one of the articles mentioned:
2009
NSA700A F-10-1 L FRONT BRAKE CALIPER
2008
NSA700A F-10-1 L. FRONT BRAKE CALIPER
2010
CBF600SA F-12-20 FRONT BRAKE CALIPER (L)
2010
CBF600NA F-12-20 FRONT BRAKE CALIPER (L.)
2009
CBF600SA F-10-1 FRONT BRAKE CALIPER (L)
2009
CBF1000T F-11-2 FRONT BRAKE CALIPER
2006
CBF1000A F-11-2 L.FRONT BRAKE CALIPER
2012
CBR600FA F-10-2 F. FRONT BRAKE CALIPER
2010
CBF1000TA F-11-2 LEFT FRONT BRAKE CALIPER
2009
CBF1000S F-12-2 L. FRONT BRAKE CALIPER
2011
CBR600FA F-10-2 LEFT FRONT BRAKE CALIPER
2010
CBF1000SA F-11-2 LEFT FRONT BRAKE CALIPER
2009
CBF600NA F-10-1 FRONT BRAKE CALIPER (L)
2009
CBF1000A F-11-2 L. FRONT BRAKE CALIPER
2008
CBF1000TA F-11-2 L. FRONT BRAKE CALIPER
2010
CBF1000FTA F-12-20 LEFT FRONT BRAKE CALIPER
2008
CBF1000SA F-11-2 L. FRONT BRAKE CALIPER
2012
CBF1000FT F-12-20 L. FRONT BRAKE CALIPER
2011
CBF1000FT F-12-20 L.FRONT BRAKE CALIPER
2010
CBF1000A F-11-2 L. FRONT BRAKE CALIPER
2008
CBF1000A F-11-2 L. FRONT BRAKE CALIPER
2011
CBF1000FS F-12-20 L. FRONT BRAKE CALIPER
2010
CBF1000FSA F-12-20 LEFT FRONT BRAKE CALIPER
2010
CBF1000FA F-12-20 L. FRONT BRAKE CALIPER
2012
CBF1000FS F-12-20 L.FRONT BRAKE CALIPER
2012
CBF1000FA F-12-20 L. FRONT BRAKE CALIPER
2011
CBF1000FA F-12-20 L. FRONT BRAKE CALIPER
2011
CB600FA F-10-2 L. FRONT BRAKE CALIPER
2009
CB600F3A F-10-2 L. FRONT BRAKE CALIPER
2010
CB600FA F-10-2 L. FRONT BRAKE CALIPER
2008
CB600FA F-10-2 L. FRONT BRAKE CALIPER
2007
CB600FA F-10-2 L. FRONT BRAKE CALIPER
2008
CBF600SA F-10-2 FRONT BRAKE CALIPER (L.)
2008
CBF600NA F-10-2 FRONT BRAKE CALIPER (L.)
2012
CB1000RA F-11-2 L. FRONT BRAKE CALIPER
2011
CB1000RA F-11-2 L. FRONT BRAKE CALIPER
2010
CB1300SA F-11 R. FRONT BRAKE CALIPER
2009
CB1000RA F-11-2 L. FRONT BRAKE CALIPER
2010
CB1000RA F-11-2 L.FRONT BRAKE CALIPER
2007
CBF1000T F-11-2 L. FRONT BRAKE CALIPER
2007
CBF1000S F-11-2 L. FRONT BRAKE CALIPER
2007
CBF1000A F-11-2 L. FRONT BRAKE CALIPER
2012
CB600FA F-10-2 L. FRONT BRAKE CALIPER
2009
CB600FA F-10-2 L. FRONT BRAKE CALIPER
There are a number of
similar calipers, the one you want looks like this.
There are two versions
of this, those used on models with linked brakes and those without.
Unlinked calipers are much rarer but are easier to fit. Linked
calipers have to be 'delinked' before fitting.
Delinking a caliper.
The 3 pistons in the
caliper are operated by 2 inputs: the outer two pistons by the upper
inlet (operated by the front brake lever on Hondas), and the centre
piston by the lower inlet (rear brake). The outer pistons are
connected by a passage behind the centre piston. To 'delink' you need
to remove the pistons and drill through the back of the centre
chamber to break into this passage. A good tip is to remove the end
bleed nipple and push the tube from a spray can of WD-40 or similar
in until it can be seen through the outer chambers. You want to drill
through the back of the centre chamber in line with this tube (I used
a long 3mm drill). When you see flakes of the plastic tube appearing
in the aluminium swarf then you know you're reached it.
When you've drilled a
neat hole give the caliper a thorough clean to remove any flakes and
chips of metal and plastic.
Rebuild the caliper
using new seals. A lot of pattern seals are poor quality (don't
ask!), so either use Genuine Honda seals or ones from a reputable
supplier. I got mine here: Link
You now have to block
the lower input as now all 3 pistons will be operated by the upper
input. Use a short screw with a finer than standard M10 x 1.25 thread
and seal with a copper banjo bolt washer.
You need a
mounting bracket to fit the caliper to the fork. Part to use is Honda
45190-MFA-D11. This is used on the following bikes:
Honda 2009 DN-01
Honda 2011-2015
CB1000RA
Honda 2013 CB1100AD
I searched for ages but
was unable to find a used one, so had to buy new. Cheapest place I
could find was Partzilla in the US who, even taking in postage and
import costs, was cheaper than suppliers in the UK. Link
Now it's just a case of
bolting the caliper and bracket on, connecting the brake hose, and
bleeding the caliper. You have to bleed it from both nipples, but the
lower nipple traps very little air.
I fitted a new brake
hose as mine was a bit untidy looking. I had ordered the one listed
by Venhill for the Bonneville, but although it would work, I didn't
like how tight it was. I ordered another one 30mm longer, this won't
be a problem if your bars aren't as high as mine.
If you have a spoked
wheel Bonneville you will now encounter another problem – the lower
mudguard stay fouls on the (longer) caliper. Rotate the stay down the
mudguard until it clears the caliper and drill 2 holes in the
mudguard and attach it with screws and nuts. Put some short screws
into the old mounting holes to tidy them up. Whilst doing this I also
fitted a rubber mudflap.
I also fitted a new,
floating disc as I was using my newly rebuilt wheels. This isn't
necessary as your old disc will work fine with the new caliper.
Check everything is
attached properly and no fluid is leaking and take the bike for a
ride to bed in the brake pads. Once pads are bedded in the brake
should be a lot more powerful but, more importantly, there will have
a lot more 'feel' so you will have more control over braking. There
will be a very small increase in lever travel, but it's
insignificant.
Only problem is that
the improved brake shows up how poor the springs in the front forks
are – next job, uprated fork springs!