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Modifications
Wone K. Yip, Canada
My base mods are a Dynojet kit, K&N filter, Kerker Slip-ons. 143 rw
hp 84 ft lb torque The Ram air quest begins with obtaining the left
&right ram air snorkels, 2 stubby air box snorkels from your local
Honda dealer. Various hosery, and 2 Honda inline filters for the carb
pressurization hoses. (options: 99 oil cooler, shorter 99 oil lines, inner
body work)
- Remove the oil cooler, and oil cooler air duct.
- Relocate oil cooler directly below triple clamp (either shorten
lines or get 99 XX lines.
- Re-position the horn by mounting it 180 degrees from it's original
position.
- You must pressurize the float bowls and vacuum chambers! Using the
overflow pipes, route new hoses into one hose and route it to one of
the small snorkels. Then route a hose from the vacuum chamber
vent hose into the other snorkel. I disconnected the pulsed air
injection system , make sure if you do, that you run a little hose
between the brass fitting and the little black one way valve on the
side of # 4 carb, 98 models don't have it apparently. Install the
little inline air filters in each line.
- Install the ram ducts and position the fairing in place.
Things slip in place fairly easily but keep an eye on how things go
back in place.
- The inner cowl panels must be trimmed a few inches to clear the
underside of the ram ducts as you will discover. (If you want to do it
really neat, buy the 99 inner cowl pieces, 99 oil cooler and lines and
other associated bits. All it takes is more money! NOW... the big
issue..... Since you are pressurizing the air box and the
carbs above atmospheric pressure, it became apparent over 200 kph that
it starved dramatically for gas. Logically, since the fuel is gravity
fed at normal atmospheric pressure, higher than normal pressure in the
bowls will overcome the flow of fuel to the point of preventing it
from entering the bowls. SO.... a 2 psi electric fuel (supply)
pump added to the system , has totally cured any starvation problems!
I did end up dropping the needles one clip to compensate for a bit of
richness/hard starting, on hot days. You must add a fuel pump...
unless you like putting around mostly around under 120 mph!!!
- Button up and recheck all re-connections..... Have fun! I can say
that even the fresh air access to the air box in itself helps overall
performance. 160 kph and above however, there is a very noticeable
improvement in the roll-ons. I am consistently 2 tenths and 1-2 mph
quicker in the 1/4 mile than before. Unfortunately, the ram air mods
can't be demonstrated on the dyno but but it has been on the drag
strip and the seat of the pants dyno! A stainless steel 4 into 1
exhaust is on order.. will keep ya'all posted I guess the quest for
150 hp at the rear wheel without internal motor work is on !!
You can send your questions about these modifications to Wone
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