| Yamaha R1 02-03. 5-8hp with modified air box.
Here's how it's done:
Remove the air box and you'll see a small plastic flap just behind the
bottom of the steering head see Pic 1 std intake. Using a razor blade cut
this flap off. This will leave you with an un-obstructed hole for clean
air to enter. See Pic 2
Take the stock air box see Pic 3 and remove the lid and air filter see
Pic 4, Remove the rubber snorkel. Between the 2 front bolt holes where
you have just removed the snorkel using a hacksaw, cut this section out
to roughly double it's original size see Pic 5
Once you have cleaned up all the rough edges assemble the air box with
a BMC or KN air filter and install it back on the bike.
Fit a Dobeck TFi part no FI - 1020 following the instructions supplied,
starting with the base setting, also supplied, go for a short ride and
keep increasing the fuel until you can no longer feel any improvement or,
alternately go done to you local dyno outlet and dial it in there, it shouldn't
take more than an hour or so.
PS tuning instructions are also included with the Dobeck and is simple
to understand and follow.
If you have already done a base run before on the dyno, after it's tuned
you should see anywhere from 5-8 hp improvement.
Please note that you MUST remap the fuel injection for this modification,
if you are in doubt do not attempt this job, take it to someone who is
qualified.
See graph below
If you want us to do it for you here's what it will cost
Airbox and intake modification $100.00
BMC air filter $145.00
Dobeck TFi FI-1020 $340.00
Install Dobeck, dyno and tune to suit $265.00
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