Clutch DRT Sport 23 teeth

for Vespa 150 GS/
60 GS/
80 SS

115mm,
108 mm
23 teeth
helical cut teeth
3 plates
7 spring(s)
with clutch cover spacer 1,0mm

Grade A – perfect repair
Product description
SIP Scootershop
got together with
Denis Innocente
at
DRT
and took on solving a problem concerning Largeframe models produced between 1946 and 1957. The original
clutch

units
are no longer available for these models. The only chance, up till then, to obtain replacement was on the used market, at mostly astronomical prices. We have now developed and produced together a new version of this
clutch
type with many ‘state of the art’ updates which guarantee a comfortably ideal light clutch action, even with increased performance motor set ups.

The
precision CNC milled components
and the newly developed clutch base plate ensure an optimal transfer of power through the clutch cluster assembly. The version we produce especially for the VESPA GS models has an inner mounting cone profile perfectly dimensioned to fit the GS models crankshaft end profile. The amount of spring guides in the clutch basket has been raised to 12 in the 86mm outer diameter version, 24 in the 96mm outer diameter version and 28 in the 115mm outer diameter version. The
original clutch springs
, supplied originally with the third generation
PX EFL/Lusso
models and the
COSA,
are supplied for use with these clutch kits. A total of six springs are sufficient for standard motor set ups in the 86mm outer diameter version, twelve springs in the 96mm outer diameter version and fourteen clutch springs in the 115mm outer diameter version. For more performance orientated motor set ups we recommend the maximum number of springs be included in your basket as is possible! The relative cohesive pressure between the clutch plates will be increased and clutch lever operation is made easier. The slightly modified positioning of the clutch spring cups leads to a pre-load effect on the springs and helps effectively to eliminate spring rattle during operation. While assembling the clutch cluster a small screwdriver can prove helpful to position the clutch springs accurately. The smaller clutch back plate bush, including needle bearings is replaced with a larger, more modern version, without needle bearings. Overhauling your motor and clutch plate replacement is made much easier. The
thrust washer
from the later VESPA models is also included with this clutch kit. If you are ordering this clutch assembly for the V 98/V 1-33T or the VN/VL VESPA models, the relevant primary drive cog specific to you particular model is included in the delivery.

The original primary drive cogs can be used with the
VESPA GS 160 and PX models
. Some clutches also need to be equipped with both clutch friction and separation plates. Regular VESPA PX 200 plates are ideal, but need to be modified slightly to fit properly. Alternatively, the DRT clutch plates are also fit for the job, without any modification necessary. Some VESPA models may need slight modification in order to fit these clutch kits, with either a clutch cover gasket surface spacer being used between the clutch cover and the crankcase or through removal of metal from the inner side of the clutch cover itself.

Conclusion:
A timely update for all those VESPA models for which the original clutches are no longer produced or available. Clutch snatch has also become a thing of the past with the added bonus of the clutch basket no longer being able to fly open due to the increased centrifugal force created by a tuned motors higher rev. range. The freedom of choice offered by the possible variation and experimentation with differing strengths of spring enables an adjustment ideally suited to the set up of your particular motor and individual need.

Do not forget to order new clutch friction and plain separator plates! You can also order varying strengths of original clutch springs to find your ideal clutch assembly set up through experimentation. A strengthened clutch circlip is also recommended.

I have this clutch mounted to my VESPA GS 4. The DRT clutch seperates cleanly, is easier to dose and compared with the original PIAGGIO item is very easy to operate. Exactly that is a great advantage!

DRT clutches are the only ones we use on our Vespa acrobatic scooters. The demands of a show scooter would mean the end for any normal clutch.

SIP man Max, trip to Toskana 2011 on Art. No. 93250000
: I’m completely convinced by the abilities of this clutch and have included it with a Malossi 210cc cylinder, a big carb. and a ROAD exhaust in my VESPA Rallys motor set up. On the trip 2011 I ended up pushing our Toni mile after mile up the ‘Stiftersjoch’ mountain pass because of his burnt up original PX clutch-until my thigh muscle gave up, the DRT clutch didn’t though!

Attention:
the Vespa 160 GS clutch comes without primary gearwheel. You will either have to order the corresponding primary gearwheel
DRT # 13082500 with 22 cogs
or the
PX200 gearwheel 13082300 with 23 cogs
. If you go for the 23 cogs version, you will get a longer transmission which is useful when riding a tuned GS160.
OEM numbers (for comparisons):
new: 8000000024701 – a24701 (previous: Clutch Okel 188e.23 GS/SS(z23 su z67) – 24701) (DRT)