WHAT CARBURETOR IS
BEST FOR A LAMBRETTA
OK, you changed the exhaust on your stock
Lambretta, or maybe not, but in either case are
thinking of a better carb. What are your
options?
There are three basic types. From worst to best:
old-tech original style, roundsldes, and
flatslides/D-slides:
Old-school
Jetex or Spaco 22mm Indian copy of the original
design from 300 years ago. Variable quality on
some, so open and check before installation as
often the jets are falling out, or their bases
cracked. Fairly cheap, though not really
considering what it is, but if it works fine,
it'll be better than what you have. There is
also a 26mm.
But if you are buying a new carb, you might as
well update to a better design. As one person
wrote, “Do yourself a HUGE favor. Dump the Jetex
and get a Mikuni or Keihin. Those Jetex carbs
will give you nothing but trouble. I fought with
mine for close to a year before I got a Keihin
pattern from scootRS and the difference is
amazing. It's soooo much smoother, idles like a
dream, never a hiccup.”
Roundslides
Mikuni and Keihin (Japan), or Dell'Orto (Italy)
up to 28mm. Roundslides are a step up in
technology from the original-style carbs, giving
better throttle response and tuning capability
(i.e., more things to tinker with if you want it
just perfect). OK option. Japanese carbs have
the best reputation but, depending on your
location, people might have more experience with
Dell'Orto, especially in the UK, though dirtbike
shops anywhere are a good source for parts and
tuning of Japanese carbs. We have a pattern
Mikuni roundslide but nonetheless recommend...
Flatslides and D-slides
Again, all three companies offer carbs ranging
from 24 to 35mm and up. Flatslides give better
throttle response than roundslides because of
the design of the slide, as well as
incorporating other new design features.
D-slides improve upon flatslides, reducing air
turbulence in the carb, and are the best. Keihin
PWK D-slides are great carbs, better than
overpriced, inferior Dell'Orto VHSA/B, and, some
say easier to tune than Mikuni, though others
like the TMX system. (Read the Scootering
showdown for the lowdown on PWK vs. Dell'Orto.)
These carbs are quite expensive, or we at
scootRS have pattern PWK cheap. We'd recommend
the 24mm on 150/175, and the 28/30mm ovalbore
PWK-type flatslide on a 200cc and most setups
with a tuned exhaust. It's a very good setup.
Extras
You need a new manifold with all of the above
carbs, so factor each manifold's cost into the
price. (We sell the 22mm manifolds for Jetex/Spaco
types, and include manifolds in our carb kits;
not sure who sells Dell'Orto ones, or what all
mixes and matches.)
You also need to remove the baffle in the air
scoop under the seat to allow more airflow, and
should cut the internal baffle out of the airbox
entirely via the neck, and even drill 8 or large
holes in the side of the airbox. Or just use a
our foam filter on the end of a GP 22mm carb
rubber. For a TS1 with a panel hole cut, you can
attach the filter directly.
If you have any questions, our professional & friendly customer
service staff will stand by to assist you.
STAR VESPA
24 hours Order: +84 9081
28158
Email: sales@starvespa.com
& starvespa@gmail.com &
support@starvespa.com
+84 9081 28158
