are all supplied with custom-made cables and jetting specifications
derived from our extensive racing program.
are suitable only for the extensively modified RD. WIth stock
reed cages, on fully modified engines only, dyno testing has
demonstrated increases in power above 9000 RPM, although full
throttle power below 5000 RPM was substantially reduced. Power
through the range of 6000 to 9000 RPM remained the same. WIth
the above information, and the fact that RD400 pistons tend
to come apart if RPM is sustained at 10,000, we do not recommend
34MM carburators, with the stock reeds, for low maintenance
WIth the TZ reed
conversion, 34MM carburators are the only way to go. With
conservative throttle application (i.e. - not fully open)
below 5000 RPM, this combination produced excellent low RPM
response with terrific power increases from 6500 RPM up.
Air filters are
supplied with carburators, along with throttle and oil injection
Please note also
that air filters that fit stock carburators will not fit the
larger, more efficient intake bells of the 34MM carburators.
(Back to Top.)
# 11351 - Fits RD350A,B '73-'75
# 11401 - Fits RD400 '76-'78, C,D,E
# 11411 - Fits RD400F '79 F (Daytona)
When these specially
jetted carburators are installed with Spec II chambers, the
combination results in a whopping 26% increase in peak power
Install these 30MM
carburators on an already Spec II modified and chamber-equipped
RD engine, and you will note power increases of 12% in the
peak (9000 RPM) and 16% in the midrange (5000-6000 RPM).
carburators, right and left idle screws;
2. Custom manufactured cables;
3. K&N high-volume filters;
4. Complete instructions.
whether your engine is stock or modified when ordering. Please
note also that air filters that fit stock carburators will
not fit the larger, more efficient intake bells of the 30MM
carburators. (Back to Top.)