Skip to main content

LOT 149

c.1966 Motobi Zanzani 250GP Road Racer Engine no. 17G.O.BEN.SS.250

Estimate: US$18,000 - US$24,000
Lot 149

c.1966 Motobi Zanzani 250GP Road Racer
Engine no. 17G.O.BEN.SS.250

c.1966 Motobi Zanzani 250GP Road Racer
Engine no. 17G.O.BEN.SS.250

· Exquisite, rare Italian 'tuner built' 1960s road racer
· Tiny, hand built 250 still capable of vintage road racing success
· Ready to run with many spare parts

A simple family squabble led to one of Italian motorcycling's most interesting sidelights. In 1949 when eldest sibling Giuseppe Benelli disagreed with his five brothers about the running of Benelli Motorcycles, he took his engineering prowess across town and started his own company, Motobi. In 1953 came the 'power egg' style of engine with its forward-facing laydown (horizontal) cylinder that the brand would become known for. Giuseppe passed away in 1957, leaving the company to his two sons, Luigi and Marco. Both were enamored with racing and hatched a plan to get Motobi into the headlines. They hired Primo Zanzani, a former racer and brilliant, self-taught tuner, to turn their 125 and 175cc models into production roadracers for Italy's Formula 3 class, an important steppingstone to national and international competition. The results were impressive: In 1965 alone, with a 250cc model joining the mix, Motobi riders took a total of 16 Italian Junior championships! Many Americans first learned of Motobi in 1962 when rider Jess Thomas used a Zanzani-tuned 207cc version of a 175 to good effect on the twisty Daytona Speedway infield course, hounding two factory Honda 4-cylinders into submission on his way to a dominating win at the US GP. Thomas, impressed by his bike's sandcast engine cases, roller-bearing bottom end and needle-bearing gearbox, campaigned it to 26 wins during the season. By now, family bridges were mended and Motobi had been reabsorbed into the Benelli empire, but financial times turned tough and in 1970 the race shop was closed. Zanzani, an early adopter of disc brakes, opened his own machine shop in Pesaro and developed a plasma iron spray that could be applied to aluminum brake rotors, giving good performance and light weight. Machines with Zanzani rotors took 24 GP world championships between 1978-92. By popular demand, he also continued assembling limited-production Motobi-based racers.

This particular bike was raced up until about 10 years ago. It features in a genuine Zanzani frame many Zanzani upgraded components including a high compression o-ring head, special piston and rings, peened and polished race rockers, competition pushrods, balanced and lightened crank and connecting rod, and flywheel plus straight-cut

35mm pumper carb with a custom intake. See also the optical ignition, modern Scitsu racing tachometer, Ceriani 35mm GP race front end with Grimeca front brakes with replica Amadorro 4-leading shoe brakes, Works Performance shocks, very rare shoulder-less sand-cast Akront rims, original Tomaselli quick turn GP throttle and Condor gold series clip-on handlebars. Finally, there's the beautiful Zanzani bodywork.

This lovely example – originally built by a meticulous tuner/racer from whom money was no object - comes with almost 100 pounds of spare motor parts.

Footnotes

Offered on Bill of Sale. As with all Lots in the Sale, this Lot is sold 'as is/where is' and Bidders must satisfy themselves as to the provenance, condition, age, completeness and originality prior to bidding.

Saleroom notices

Please note, this is a privateer road racer with factory components. Additionally, there is a partial frame number due to holes of *4170*. The engine number is *1744*G.O.B.SS250.

Additional information

Own a similar item?

Submit your item online for a free auction estimate.

How to sell

Looking for a similar item?

Our Motorcycles specialists can help you find a similar item at an auction or via a private sale.

Find your local specialist

Specialist section

Auction Viewings

  • 22 January 2020, 09:00 - 18:00 PST
  • 23 January 2020, 09:00 - 12:00 PST

Bid now on these items

1933 Velocette 349cc KTT MkIV
United Kingdom
Coming soon

1933 Velocette 349cc KTT MkIV

£14,000 - £18,000
1949 Vincent 998cc Series-C Rapide
United Kingdom
Coming soon

1949 Vincent 998cc Series-C Rapide

£16,000 - £20,000
2011 Bugatti Type 52 by Authentic Models
Denmark

2011 Bugatti Type 52 by Authentic Models

DKK100,000 - DKK150,000
1989 Peugeot 205 GTI 1.9
Denmark

1989 Peugeot 205 GTI 1.9

DKK120,000 - DKK180,000
Offered from the 'Somerset Hoard', barn stored since circa 1939 1913 Belsize 10/12hp Open Tourer
United Kingdom

Offered from the 'Somerset Hoard', barn stored since circa 1939
1913 Belsize 10/12hp Open Tourer

£10,000 - £15,000