Back in February, we brought you news of a new twin-cylinder Lambretta engine that had cracked the 100bhp barrier. Now we have an update for you.
Since our story, Lutz at Lutz-Lambretta has continued to develop the project and has taken positive steps towards industrialising his evil Twin, with a view to selling it to the power-hungry public in two configurations.
You can see the production-ready version of Lutz’s one-part Fusion-Twin-crankshaft in Austria next week, along with a complete engine…
Bolt-on kit
The really clever part about this twin is that it’s designed as a ‘bolt-on’ top end for use on standard-layout Lambretta casings (Uni or GT casings are specified depending on power choice).
Visit the stand
If you’re heading to Austria for Euro Lambretta next week, you can see it up close on his trade stand and in action on the dyno and possibly on the road as well.
105mph on the road
In addition to lots of product development for the production units, Lutz has recently taken the record-breaking dyno engine out for a brief road test. He shot the short video above, but afterwards he realised the speedo reading was lagging, so the acceleration isn’t as accurate as it could have been.
You’re having a laugh!
How did it feel on the road? Lutz said, “The scooter was running a 23/46 primary to try and keep the front wheel on the tarmac” – it failed miserably! “I took the bike out in Germany without a valid MOT, still full of sensors and test equipment. At one point, I rolled on the throttle from about 50 km/h, and within seconds, I was close to 170 km/h… when I checked the mirror, there were blue lights behind me. Luckily, the two police officers stopped me, didn’t quite know what to make of the whole setup, and I got away with just a warning. It could have ended much worse, with the bike being confiscated”. Whoever said the Germans have no sense of humour?
True potential
Lutz went on to say, “That ride really showed me the potential of this engine – the acceleration from 50 (31mph) to 170 (105mph) in such a short time, and the ease with which it pulled is honestly on another level. It doesn’t feel like riding a scooter anymore.”
CNC parts ready for assembly, complete with German patent number
More than just a show pony?
We all know that the German and Austrian scooterists like to wave their dicks around and showboat on the dyno. We also know that Lutz’s impressive 105bhp dyno run was aided by nitrous. However, this isn’t just a dyno engine, Lutz plans to offer it as a complete engine for the speed hungry…
He’s already received the first CNC samples so he can assemble a complete engine and will have samples on show at Euro Lambretta. He should also have the first customer engines ready to go out.
Full fat or road tuned?
Lutz’s dyno engine has formed the basis for the two production versions, albeit in a more rideable state of tune. The twin configuration is exclusive to Lutz-Lambretta, and its design is protected as a registered utility vehicle by the German Patent and Trademark Office.
Wraith 421 Twin Street Performance
This version will make around 60bhp and 50 Nm of torque.
Technical features:
- Engine: Lambretta Twin 421 cc LC, built by Lambretta-Lutz
- Case: 125/150/175/200 (Uni Block recommended)
- Crankshaft: 58 x 125 mm (102 mm cylinder spread)
- Top End: Athena Big Bore Barrel
- Power: 60 HP
- Torque: ~50 Nm
- Clutch: Modified AF Python 8
- Carbs: 2 TMX 35 mm, RD reeds
- Exhaust: 2-into-1
When 60 bhp isn’t enough
The Wraith 421 boasts a modest 60 bhp and should be built using a set of Uni casings. It’s a ‘fast, aggressive street-ready twin.’ If you’re a raving mentalist, you can go for the Morrigan 421 – Twin Hyper Performance engine. This one uses the stronger GT casings and will make a modest 78 bhp using ordinary pump fuel, or over 100 with the addition of NOS.
Morrigan 421 – Twin Hyper Performance
An epic, high-performance street twin. Based on the 106 HP record engine, this ultimate street killer delivers 78 bhp and 65 Nm of torque. (with optional NOS: over 100 HP and 95 Nm – not street legal.)
Technical features
- Engine: Lambretta Twin 421cc LC, built by Lambretta-Lutz
- Case: GT-based only
- Crankshaft: 58 x 125mm (102mm cylinder spread)
- Top End: Assassin 2 cylinders
- Power: 78bhp (100+bhp with NOS, 95+Nm – not street legal)
- Torque: 65Nm
- Clutch: Modified AF Python 8
- Carbs/NOS Injection: 2 TMX 38mm PJ, VF4 reeds – NX wet NOS System
- Exhaust: 2-into-2
Video walkaround
Lutz shows us around the scooter. It looks fairly standardish, especially from the exhaust side, until you delve a little deeper. The huge side-mounted rad is the biggest giveaway, at least with the panel off.
Various gauges, including temp gauges for left and right cylinders and a continuity tester, are mounted to this test mule for on-the-road real-time checks. It all looks a bit haphazard, but it is necessary during the development phase.
Road test?
Lutz has promised to let me have a ride at Euro Lambretta, so if you see somebody fighting to control what looks like a fairly inconspicuous Lambretta at great speed, that will be me. Don’t expect me to wave back at you though!
Iggy
