Vespa T5 exhaust - order the test winner bgm BigBox

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Vespa T5 big box review SLUK

bgm BigBox Vespa exhaust for T5 is test winner

Our Racing exhaust for Vespa has been tested again. And again it is the test winner with the greatest performance. In that case it became ours BigBox for the Vespa T5 from UK online scooter magazine SLUK tested. Here is a video of the test:

BGM BigBox Touring for Vespa T5

The bgm BigBox Vespa T5 is designed as a replacement for the original sensationally good exhaust system of the Vespa PX special model T5. The T5 engine designed by Morini has some peculiarities due to the adapted powerful 125cc motorcycle cylinder.

The T5 engine reacts very strongly to the exchange of the exhaust system. The BGM BigBox for the T5 is based on the standard exhaust in order to keep the torque in the lower and middle speed range at a similarly high level as the standard exhaust. Depending on the setup, it can turn out a little further.

Nice to see at our customer Nino in Portugal, Original T5 with the bgm BigBox. Seems to be fun:

BigBox T5 Touring performance diagrams

Vespa T5 Original with BigBox

dyno-diagram_bgm_bigbox-bgm1012tr

Vespa T5 152cc Polini with BigBox

dyno-diagram_bgm_bigbox-polini-bgm1012tr

Conclusion

Nice to see in the diagrams: ours bgm BigBox harmonizes with the original engine as well as with Polini 152 or Malossi 172 tuning cylinders. On revised engines, the larger volume of the BigBox Touring results in a significantly better torque and power curve than with the original exhaust.

Final Words

You can find the detailed test here: SLUK

The Silver Fern needs a new brake system.

We use a complete LML disc brake for this. A T5 fender is to be mounted on the new steering tube. Since the T5 mud flap is a bit smaller, it is necessary to move the side holder.

The existing holder is therefore removed and the point at which it is to be welded on is prepared.

We bring the holder with the fender into the correct position.

After the holder is firmly connected to the steering tube again, we prepare the hole for the steel braided brake line.

The bore is widened to 9mm so that the connections of the brake line fit through.

We are still dipping the steering tube in fashionable matt black, we hope the new color scheme does not unbalance the sophisticated color concept of the Silver Fern too much.

While the paint dries, let's turn to the steering head bearings.

Special tools are required to remove the old shells.

With the plate ...

you get into the gap between the lower bearing shell and the seat.

The tool for the upper bearing shell ensures that the shell does not tilt in the head tube and widen the sensitive seat when it is removed.

When the old shells are removed, the new ones can be fitted with an insertion tool.

The steering tube is still drying. Therefore we only now turn to the handlebars.

The handlebars must be prepared accordingly for the brake pump holder.

We are taking this step-by-step.

Cut in first ...

... and then mill out to match.

We will replace the supplied Nissin brake pump with one of the current Vespa S / LX models.

The reason for this is the smaller piston diameter, the Nissen pump comes in the classic
1/2 inch format therefore, with a piston diameter of 12,7mm, while the pump of the Vespa S is equipped with an 11mm piston.

The smaller piston diameter enables higher braking power with less manual force.

The greater lever path due to the smaller hydraulic reduction leads to better controllability.

The adapter and the pump need to be adjusted slightly.

Fully assembled, it gives a very pleasing picture.

After the finished processing, the handlebar is also adapted to the new color concept and soon "shines" in matt black.

The steering tube is now dry. After the fender is mounted, the lower one
Open bearing shell and dust cover.

The steering tube is then inserted with plenty of grease for the bearings.

This one…

we replace with a set of new trains in Piaggio quality.

For the throttle cable, we use a universal throttle cable, the original Piaggio cable is unfortunately too short for the 28 Keihin.

After all the cables have been threaded in and the switch cables have been laid, the handlebars take their place on the new steering tube. We still have to come up with something on the subject of gas pipes. In order to open the 28er completely, the original gas reel would even be sufficient, but you would have to grasp at least once with the “tap open” movement.

This results in 2 solutions.

On the one hand, quick throttle grips are preferred, they give a sporty touch.

However, if you prefer a restrained look, you might be better off with a very inexpensive solution.

For some it is old hat, the pulley with stop.
There is no need to mount a suitable gas tube for quick throttle and the handlebars remain symmetrical.

Due to the conversion to a fully hydraulic brake system, there is no longer a brake cable running through the gas pipe, so we can freely choose the stop of the roller by positioning the screw.
However, if a brake cable continues to run through the gas pipe, then you are usually forced to drill new holes for the split pin attached to the pulley.

Piaggio Vespa T5 125cc

Piaggio Vespa T5 125ccCongratulations Vespa T5 for the 25th birthday!

- the motor with five overcurrents (Traversi5) like from the two-stroke picture book,
- comfortable seating position for driver and front passenger,
- a small disc that cleverly bypasses wind turbulence past the helmet,
- a tachometer that scientifically substantiates the engine orgies,
- black spoiler under the leg shield
- and racing driver Nelson Piquet as pole position representative.

Nobody can say that in 1986 Piaggio did not go to great lengths to equip their newest racehorse in the stable.
Due to the unfortunate driving license requirements and the modern look, the reaction in Germany was rather restrained. The wild teenagers had their driving license limited to 80ccm and tormented their way through life with the brave but lame PX 80, and for the older guys the virile character and sporty look of the five were probably a bit too modern.
In Great Britain and Italy, due to other legal provisions, a real boom set in.
But the T5 has also made the leap to a classic here in Germany. Not least because of their great engine characteristics. 12HP from 125ccm made and let larger displacement Vesps quickly look old, and that with a unique driving experience, thanks to the turbine-like speed.
The T5 and its engine have become indispensable for trips out, club rallies, meetings, or hidden in strange clothes on the racetracks.

Due to many imports from Italy, Spain and Great Britain you can see more T5 scooters on our streets today than in the 80s. Should you stumble across a good specimen, don't hesitate and strike.

 

[youtube] uKp0FNMBwFQ [/ youtube]

 

We also say congratulations Vespa T5 and we have a lot of products in our program to preserve this classic. Be it the rare original exhaust systems, specific frames / add-on parts or tuning items such as the popular Malossi 172. Whether original or conversion, our heart beats for the T5.
A small selection from the one stop scooter shop for maintaining a great scooter.

Lettering side panel -VESPA- T5- Vespa T5
1050020
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621642270928&target=productdetail&category1=C&category2=CAT

Exhaust -PIAGGIO ORIGINAL- Vespa T5
9021000
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641324176&target=productdetail&category1=C&category2=CAT

Speedometer glass -PIAGGIO- Vespa T5
455001
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621642713888&target=productdetail&category1=C&category2=CAT

Rear light -VESPA- T5
4550017
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641440048&target=productdetail&category1=C&category2=CAT

Lettering luggage compartment shelf -VESPA- Pole Position - Vespa T5
4550015
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621642271424&target=productdetail&category1=C&category2=CAT

Storage on overhead bin -VESPA- T5
4550013
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641678320&target=productdetail&category1=C&category2=CAT

Cockpit window -VESPA- T5
4550001
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641674336&target=productdetail&category1=C&category2=CAT

Headlight -VESPA rectangle- T5
4550016
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641521376&target=productdetail&category1=C&category2=CAT

Speedometer border -VESPA- T5
4550002
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641651936&target=productdetail&category1=C&category2=CAT

Cascade set -VESPA- T5 - unpainted
1050006
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621641679872&target=productdetail&category1=C&category2=CAT

Center stand -VESPA- PX, T5 - black
4350054
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288666782429376&target=productdetail&category1=C&category2=CAT

Cylinder cover -VESPA- T5
4350040
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621642743792&target=productdetail&category1=C&category2=CAT

Cylinder -MALOSSI 172ccm- Vespa T5
1120020
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621643578384&target=productdetail&category1=C&category2=CAT

Lock cylinder set -VESPA- Vespa PX Lusso (from 1983), PK S-XL, T5
4350066
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=288621638385664&target=productdetail&category1=C&category2=CAT

Bench -VESPA- T5
7900116
http://www.scooter-center.com/scoweb/pages/productdetail.grid?product=289442597034624&target=productdetail&category1=C&category2=CAT

black Vespa T5 - seat in 1a - original optics.

Very neatly processed, that's it best alternative to the original T5 seat from Piaggio that we have ever seen.

The original bench has not been available for years. In parts markets, even the most finished bench seats with torn bench covers are sold at the highest prices.

So a part that you like to put on the shelf just in case. Order here now

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