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Well, I looked inside the airbox, and figured that while I was putting on the
TBR exhaust and Factory jet kit (a nightmare - I ended up getting a local cycle
shop to sort the jetting, as I don't have an exhaust gas analyser), I'd replace
the original Honda
air filter.
Now, in the UK,
K&N
make a filter specifically for the Hawk, (the part number is HA-0005). I'd used
one of these to good effect on my Hawk in the UK... K&N filter, DynoJet kit and
a Spec II pipe gave 51hp, not bad for a low revving twin. This isn't available
in the US, so I had a friend in the UK order me one, and another friend carry it
over for me in his luggage... cool.
The Honda filter fits fairly flush, and filters over the top, whereas the
K&N
item filters around the edge... an easy performance mod (or noise mod, depending
on how you looked at it) was to cut holes in the top of the airbox (this was done
on my UK Hawk when I got it, and I ended up taping up the holes as the carb roar
was getting me down - call me old), but the K&N's top will block these holes
up. It might make sense to run the airbox with the top off, but it cuts down on
the noise with it on, so I do that.
I figure the air filter is about $100, give or take, depending on the exchange
rate.
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