High quality crankshaft for the Motovespa GT160 engines

Motovespa GT 160

The Spanish licensee Motovespa SA based in Madrid has developed the Motovespa 160 (09C).

Definitely an odd specimen - electronic ignition similar to the Serveta Lambrettas but still with piston connections. The body is basically a sprint/rally, but the engine is an odd mix of old and new technology.

The Motovespa 160 is often confused with the Super Sport 180, but at second glance you can see the many differences.

Finally, the Vespa 160 GT was a version with a series of side panels and accessories that made it even more attractive.

Exploded views here

BGM Pro crankshaft

The BGM Pro crankshaft for the GT160 is available in different versions.

In general, the original Femsatronic ignition of the GT160 fits all versions. On the drive side there are variants for the original GT160 clutch or the variant to use the PX clutch type.

All PX 6 and 7 spring clutches as well as all Cosa and bgm Superstrong clutches can be used here.

The thrust washer is also used on crankshafts with type PX coupling stub BGM6033 and the woodruff key 9999002 thats it!

We offer both variants with the standard stroke of 57mm and as a long-stroke version with a stroke of 60mm.

For the crankshafts with 60mm stroke, the engine case has to be modified to create space for the lower connecting rod eye.

Since only a small amount of material has to be removed here with a radius of 0.8 to 1mm, this task can easily be completed in a few minutes with a hand milling cutter.

With the 60mm stroke variant, the control angle of the cylinder changes.

Typical for the GT160 cylinder are the relatively large control angles for the transfer ports in connection with the very short control angle of the exhaust port.

With the original 57mm stroke, the cylinder has the following control angles:

Piston recess 0.5mm

Inlet angle: 131°

Outlet angle: 144 °

Transfer angle: 119°

Forward outlet: 12,5°

If the same cylinder with 60mm stroke is used, the following control angles result:

Piston protrusion: 1mm

Inlet angle: 132°

Outlet angle: 148 °

Transfer angle: 124°

Forward outlet: 12°

21/12/2022/by alex

BGM PRO Tuning crankshaft for Vespa Wideframe

Vespa, Wideframe

Vespa Wideframe Tuning crankshaft

The bgm PRO crankshaft is optically based on the purpose-built design of the 50s and offers all the advantages of modern materials and manufacturing methods. with 57 mm stroke and a 110 mm connecting rod it is perfect for converting all 2-channel motors from 54 to 57 mm and thus the To enable assembly of a tuning cylinder.

We have developed an extremely resilient tuning crankshaft for the highest demands!

The forged crank webs are adapted to the balancing factor for the cylinder and piston used for tuning by means of compensating bores and offer a particularly good running smoothness even at a higher speed level of the more powerful engines. The high surface quality not only offers an impressive look, the ground surfaces also ensure a long service life for the shaft sealing rings and a reliable fit of the crankshaft bearings.

High-alloy forging blanks had to serve this noble BGM PRO crankshaft for Vespa Wideframe Models could arise. This shaft is ideal in connection with the BGM PRO 150cc Vespa Wideframe Tuning cylinder.

You don't even want to tune your old Vespa? This wave is of course also called a quasi indestructible wave for original engines a clear recommendation.

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vespawideframe-crankshaft-bgm057110_5

vespawideframe-crankshaft-bgm057110_4

vespawideframe-crankshaft-bgm057110_3

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The bgm PRO crankshaft offers a stronger connecting rod with high quality bearings. The lower connecting rod bearing is flanked by robust thrust washers and is therefore sufficiently dimensioned for higher speeds and outputs. Generous lubrication slots and pockets ensure an optimal supply of the lower bearing with the important lubricant. With the use of a needle bearing instead of a traditional gunmetal bushing for the piston pin, the bgm PRO crankshaft offers another decisive advantage for creating a permanently powerful engine. For a better oil supply, there are also lubrication holes in the upper connecting rod eye, which absorb the centrifugal oil and pass it on to the piston pin bearing.

Modern technology for the old engine

A big advantage of the BGM PRO crankshaft compared to an original one is the use of a high-quality connecting rod with needle bearing (instead of a plain bearing bush) and a slotted lower connecting rod eye. This significantly reduces the oil requirement so that the engines can use today's high-quality oils without any problems 1:50 mixture can be driven.

The balancing factor was improved, among other things, by a hollow crank pin.

Hub: 57mm
Connecting rod length: 110mm
Piston pin: Ø15mm
Connecting rod bearings: needle bearings (top and bottom)

Suitable for 125 and 150 Wideframe Vespa engines

The crankshaft is suitable for all 125ccm and 150ccm engines. The 125ccm engines only have a stroke of 54mm ex works, so a cylinder is required here that is designed for 57mm stroke (BGM1550, Pinasco North Cape).

The BGM PRO Vespa Wideframe crankshaft fits in the following vehicles:

Vespa: VM, VN
ACMA: 125 (70191-295883), GL150
Motovespa 125N, 125S, V56, V58, V72
Douglas GL2, 42L2, 92L2

Tip:

You can find more interesting products for your Vespa oldtimer in our Vespa Wideframe Catalog DOWNLOAD

Now here is your new one Wideframe Buy crankshaft

25/10/2019/by Heiko Lepke

Vespa crankshafts bgm PRO available again

Largeframe, Smallframe, Vespa

Crankshaft bgm PRO Vespa

The coveted bgm PRO crankshafts Vespa for Vespa PX, Vespa PK and Vespa V50 are now available again.

bgm PRO crankshaft Vespa at Scooter Center available!

Buy Vespa crankshaft here

Practical revision kits for Vespa engines

We offer you in our Scootershop on cheap revision kits. The practical sets contain all the parts you need to overhaul your Vespa engine:
Vesps revision kits

Our tip: bgm PRO Protection gloves

We recommend ours to protect against injuries and dirty fingers Work gloves by bgm PRO

Buy Vespa crankshaft here

13/10/2017/0 Comments/by Heiko Lepke

Crankshaft -BGM- (rotary valve) 48mm stroke and 51mm stroke, 105mm connecting rod- Vespa P80X, PX80

Largeframe, News, Vespa

Crankshaft Vespa PX80

Many of you still know and may have discovered your love for the Vespa on this scooter:

The Vespa PX80, which was built by Piaggio only for the German market.

80cc - the German way

With the fall of the old regulation valid in Germany until 14.02.1996/80/80, 80ccm up to a maximum of 80km / h, the sale of the PXXNUMX in Germany was also discontinued. Unfortunately, the spare parts supply from Piaggio became very scarce. For a long time there was no alternative to the expensive, original and difficult to find Piaggio PXXNUMX crankshaft.

In the meantime, however, the PX80 has also stood out from the shadows behind the PX200, which is favored in Germany, and there is a loyal fan base for the smallest motor from the PX family.

Vespa PX80 tuning

With the appropriate components, however, the PX80 can again experience an enchanting second or third spring and catch up with the performance of its big sister.

Well-known friends are here “The 139er” from Malossi and “The 135” by Diffusione Ricambi, DR for short.

While Pinasco tried to add a shovel with the 149 aluminum cylinder, Polini never tried the PX80.

Vespa PX80 crankshaft - the weak point

No matter which cylinder drove the unit of the PX80, the original crankshaft went the usual way: it quit service due to the loss of the thrust washers and the resulting death of the lower connecting rod bearing - good advice was expensive.

The solution: our Vespa PX80 crankshaft from bgm PRO

You will learn from experience, which is why we have the easy-to-turn PX80 with our bgm PRO Crankshaft for Vespa PX80 donated a set of sturdy thrust washers.

With the bgm crankshaft there is finally a suitable replacement for the PX miniature motor.
With the bgm standard crankshaft with 48mm stroke, there is only a very slightly longer intake time.

Other crankshaft manufacturers design a much too large opening angle for the PX80, the result is that the cylinders with the small control angles in connection with the small inlet provided by the "anti-tuning bores" no longer run usefully in the lower speed range. The tunability of such motors also suffers due to the large opening angle.

Also available as a long stroke shaft Vespa PX80

So that screwing on the PX80 is fun again, we also have a "Long stroke version”Placed on the bgm crankshaft.

With 51mm stroke On the small engine, other performance values can be achieved and the existing cylinders benefit from the increased control angles.

Order crankshaft for Vespa PX80 here

Comparison of long-stroke and standard shaft

Here is a quick comparison when using the different cylinders on 48mm and 51mm stroke.

Series stroke 48mm	Outlet angle °	Overcurrent angle °	Advance °
DR135	155	115	20
Malossi 139	182	120	31
SC conversion cylinder 125ccm	155	110	22,5


Long stroke 51mm	Outlet angle °	Overcurrent angle °	Advance °
DR135 + head gasket 1,5mm	158	121	18,5
DR135 head gasket 1,5mm (+ 2mm outlet height)	168	121	23,5
Malossi 139 head gasket 1,5mm	184	126	29
Malossi 139 head gasket 2,0mm (foot -0,5mm)	182	124	29
SC conversion cylinder 125ccm head gasket 1,5mm	158	117	20,5
SC conversion cylinder 125ccm head gasket 1,5mm (+ 2mm outlet height)	168	117	25,5

Tip: Pay attention to the correct translation

If the PX80 is equipped with a larger cylinder, the Primary reduction be changed.

The PX80 has the shortest version with 20/68 teeth. For the original clutch with 6 springs and a diameter of 108mm Clutch pinion available with 21, 22 and 23 teeth.

A clutch for life:

Alternatively, the entire clutch can be exchanged. Also the BGM Superstrong Fits into the PX80 after a few small changes and can be operated with the primary wheel of the 80s. Here, too, there are variants with 20, 21, 22 and 23 Teeth.

Vespa clutch bgm PRO Superstrong MADE IN GERMANY Cosa clutch Vespa PX

01/08/2017/0 Comments/by alex

Crankshaft bgm PRO for Vespa PX125 and PX200

News, SC workshop, Vespa

New crankshaft bgm PRO for Vespa PX 125 and Vespa PX 200

We are working on a new version of the bgm PRO crankshafts for the PX engines. We have already installed the first samples in our engines for testing.

With the new version of our coveted bgm PRO crankshafts for Vespa, we have Maintain the tried and tested and few but distinct improvements performed.

Connection between crank pins optimized

Vespa crankshafts - bgm PRO im Scooter Center Blog.PURE SCOOTERINGblog.scooter-center.comWe paid special attention to the connection between the crank pin and the crank web. The quality of this connection determines how durable and reliable a crankshaft runs.

By redesigning both partners in the press fit, the crank pin and the crank webs, we have provided significantly more press surface and thus a secure connection.

We have only changed the design of the crank web in the inlet area slightly.

On the Vespa PX200 engines the tried and tested fitting angle remains until the inlet closes approx. 65 ° after TDC.

The connecting rod has also been changed. New material and changed dimensions make the highly stressed component of the Vespa engine reliable and stable.

We have retained the previous features of the bgm PRO crankshafts.

With the wider rotary valve surface, a larger inlet area in the motor housing or, alternatively, a wider coverage of the rotary valve sealing surface can be implemented.

The shaft seal seats are designed to be easy to assemble; folding over or damaging the sensitive sealing lips is almost impossible. In addition, the shaft sealing ring seat on the generator side is manufactured in such a way that shaft sealing rings made of FPM with an upstream dust lip can be used sensibly.

We are still testing the crankshafts

Unfortunately, we cannot tell you when exactly the new version of the bgm Pro crankshaft will go on sale. We still have a few test kilometers to do and are still looking into a few changes.

But we are sure that we will be able to offer THE rotary valve crankshaft for your Vespa again very soon.

New and good at a glance

wide rotary valve surface
optimal inlet angle for rotary vane motors
Flow-optimized inlet area of the crank web
improved interference fit
optimized oil seal seats
stable connecting rod with lubrication slots
lower connecting rod bearing with silver cage
forged crank webs

New crankshafts for Vespa PX 125 and Vespa PX 200

The new version of the bgm PRO crankshafts will be available in 57mm and 60mm stroke for the PX125 and PX200 engines.

Current crankshafts bgm PRO Vespa

31/07/2014/0 Comments/by alex

All Lambretta crankshafts bgm PRO available

Lambretta, News

All bgm Lambretta crankshafts are available!

Lambretta crankshafts

Crankshaft -BGM Pro HPC 58 mm Stroke, 110 mm Connecting rod Lambretta

Kurbelwelle+BGM+Pro+HPC+58mm+Hub+110mm+Pleuel+Lambretta+DLGP+125cc+175cc+200cc+225cc+250cc

Crankshaft -BGM Pro HPC 58mm stroke, 110mm connecting rod- Lambretta DL / GP 125cc, 175cc, 200cc, 225cc, 250cc

Article no. BGM11063G

Forged full circle shaft with Yamaha connecting rods.
Great emphasis was placed on balancing during development. Thanks to tungsten weights (100 g per crank web), copper weights and hidden pockets, the shaft has an exceptionally high balance factor. This ensures particularly low-vibration engine operation.
The longer connecting rod offers a better deflection angle and thus relief for the lower connecting rod bearing. The longer connecting rod is balanced with a 3 mm foot spacer. The lower connecting rod bearing is lubricated via two large lubrication slots. The open silver cage bearing can cope with the highest demands.
The diameter of the crank pin is 22 mm. In connection with the correct undersize to the crank web and a special adhesive as a lubricant, the shaft is perfectly protected against twisting.
CONCLUSION: The bottom line is that the bgm crankshaft offers the highest quality in all respects. From every component to the manufacturing accuracy to the materials used.

Included in the delivery are:
Crankshaft 58 mm stroke / 110 mm Yamaha connecting rods
Spacer cylinder base small motor housing - 3 mm
Spacer cylinder base large engine housing - 3 mm
Upper connecting rod bearing - 20 mm wide
Upper connecting rod bearing - 22 mm wide
Spacer washer for bearing 6305 - 0,5 mm
Spacer washer for bearing 6305 - 1,0 mm
Maghousing seals come in three strengths
Comprehensive installation instructions

Crankshaft -BGM Pro HPC 60 mm Stroke, 115 mm Connecting rod Lambretta

Kurbelwelle+BGM+Pro+HPC+60mm+Hub+115mm+Pleuel+Lambretta+DLGP+125cc+175cc+200cc+225cc+250cc

Crankshaft -BGM Pro HPC 60mm stroke, 115mm connecting rod- Lambretta DL / GP 125cc, 175cc, 200cc, 225cc, 250cc

Article no. BGM11067

Crankshaft -BGM Pro HPC 58 mm Stroke, 115 mm Connecting rod Lambretta

Kurbelwelle+BGM+Pro+HPC+58mm+Hub+115mm+Pleuel+Lambretta+DLGP+125cc+175cc+200cc+225cc+250cc

Crankshaft -BGM Pro HPC 58mm stroke, 115mm connecting rod- Lambretta DL / GP 125cc, 175cc, 200cc, 225cc, 250cc

Article no. BGM11066

Crankshaft -BGM Pro HPC 60 mm Stroke, 110 mm Connecting rod Lambretta

Kurbelwelle+BGM+Pro+HPC+60mm+Hub+110mm+Pleuel+Lambretta+DLGP+125cc+175cc+200cc+225cc+250cc

Crankshaft -BGM Pro HPC 60mm stroke, 110mm connecting rod- Lambretta DL / GP 125cc, 175cc, 200cc, 225cc, 250cc

Article no. BGM11065G

Forged full circle shaft with Yamaha connecting rods.
Great emphasis was placed on balancing during development. Thanks to tungsten weights (100 g per crank web), copper weights and hidden pockets, the shaft has an exceptionally high balance factor. This ensures particularly low-vibration engine operation.
The longer connecting rod offers a better deflection angle and thus relief for the lower connecting rod bearing. The longer connecting rod is balanced with a 3 mm foot spacer. The lower connecting rod bearing is lubricated via two large lubrication slots. The open silver cage bearing can cope with the highest demands.
The diameter of the crank pin is 22 mm. In connection with the correct undersize to the crank web and a special adhesive as a lubricant, the shaft is perfectly protected against twisting.
CONCLUSION: The bottom line is that the bgm crankshaft offers the highest quality in all respects. From every component to the manufacturing accuracy to the materials used.

Included in the delivery are:
Crankshaft 60 mm stroke / 110 mm Yamaha connecting rods
Spacer cylinder base small motor housing - 3 mm
Spacer cylinder base large engine housing - 3 mm
Upper connecting rod bearing - 20 mm wide
Upper connecting rod bearing - 22 mm wide
Spacer washer for bearing 6305 - 0,5 mm
Spacer washer for bearing 6305 - 1,0 mm
Maghousing seals come in three strengths
Comprehensive installation instructions

16/07/2014/0 Comments/by Heiko Lepke

Scooter Center Xmas P4 duel

test, Vespa

On Friday the 14.12th of December was the first day of our X-Mas duel.

Despite sub-zero temperatures, some performance seekers came to our test bench.

For refreshment, hot coffee with a shot and warm pretzels were available in our workshop

To begin with, we would like to briefly introduce you to the engine that needs to be beaten - the duel class, Vespa Smallframe, max.140ccm, one-piece outlet and sucked in via the motor housing.

The current state of affairs is 28,4HP at 9800U / min, from December 16.12.2010, XNUMX with a 133 gray cast iron Polini, bgm crankshaft, Magic fire exhaust and 35 Keihin PWK Carburetor with Strohspeed intake manifold and Polini membrane.

Among other things, the Strohspeed intake manifold was developed and tested on this engine, from the first prototype made of steel, through the cast samples made of aluminum to the finished intake manifold.

Today's fire magic exhaust also brought its first horsepower to the role on this Polini engine - the first Proto was still a straight pipe and was called Astro1.

We would like to show you some meaningful runs in the duel class:

Mathias Scherer from Ludwig & Scherer, currently with 28,2 HP, also with a Polini gray cast iron cylinder. The rotary valve (!) Is operated by a 38 Keihin PWK fed and currently provided with enough horses by a fire magic.

Jonas from Nettetal should of course not be absent from this campaign. In the Germanscooterforum you can be constantly advancing "Summer-Winter Project" admire.

It also fires a Polini 133 made of gray cast iron. The motor is also equipped with a Polini membrane and is ventilated via a 35 Keihin PWK. With the last changes to the control angles, now 128/196, a lot has happened here too!

In the first attempt with the air filter, the limit of 28,4 HP could not be cracked….

Without the fan ring of the Vespatronic, the output rose to over 30 HP….

... mmhh, then after almost exactly 2 years I have to get the Polini motor out of the corner and put it back on again - or maybe just unscrew the fan ring ;-)

There is still some time until the second day of the duel - but for December 2st. also announced numerous comrades-in-arms whose engines should also be able to exceed the 21.12HP limit ...

It will definitely be exciting.

16/12/2012/0 Comments/by alex

Scooter Center Xmas P4 duel

test, Vespa

At the end of the year we let it rip again. On the last two Fridays before Christmas, December 14th and 21st, 2012, we invite you all to join us again in Glessen from 10 a.m. to 17 p.m. Waiting for you:

· Test bench competition in different classes

· Steaming coffee with a shot

· Warm pretzels

· Solid engines

20% in store sales (code word: Xmas)

· WHO IS BEATING THE ALEX on our P4? *

* With Smallframe up to 140ccm, one-piece exhaust & housing suction!

Waiting for the winner Scooter Center Voucher worth 100 € !!!

11/12/2012/0 Comments/by marketing

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