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1972 Factory CZ250 Build

April 17, 2021 By ndrake55

1972 Factory CZ250

Greg Robertson’s CZ250 Build

This was the condition of the bike when I first saw it at Marty Tripes shop in 2011

Most of the original parts were in several boxes…it appeared to be complete with the “important” pieces
still intact. The Factory frame (which later became the production 1974 “Red” frame) was straight with
original paint.

1972 Factory CZ250 Build
“Factory” stamped numbers
1972 Factory CZ250 Build
Correct #12 frame number
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build

This is the bike condition when I acquired it.  It had been set up for Vintage Racing.  The original parts had been scattered around as the bike had gone thru many hands since 2011.  Fortunately, most of the original parts were located……  The Factory motor was rebuilt by Charlie Richardson from CR High Performance.  Charlie said that the motor had extensive machining done to the internal parts including the clutch basket and the transmission. The 4 speed gear box was approx. 4oz. lighter than a production 4 speed.

1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build

The strip down begins…as does the hunt for the original parts.  As missing “original” parts were located, they were added to the build.  Missing parts that could not be located were correctly reproduced.  The lower “duel bolt” triple clamps and 17″ brake stay arm were provided by Frank Schauer, Master Machinist and long time CZ rider in Canada….

1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build

The original Bing carburetor and manifold were located and installed along with the original seat and original Factory fork legs.  The hunt continued and the original pipe, fork leg protectors and other items were found and installed later in the build.

1972 Factory CZ250 Build
1972 Factory CZ250 Build
1972 Factory CZ250 Build

The original KONI shocks were rebuilt by Robert Haag who is a master at rebuilding Koni shocks.  Robert found that the shocks had machined parts in them….new O-Ring holders.  Though well done, it appeared as though the work had not been completed and the shocks could not be assembled correctly.  They were returned to original and the parts kept.

Machined O-Ring holder
1972 Factory CZ250 Build

The restoration/preservation of this bike took approximately 2 months.  Items that could be left untouched, were.  Other parts of the bike needed complete restoration as they were either damaged beyond repair or the “original patina” no longer presented well.  The completed bike looks clean and well prepped for the next race!

Greg’s bike is #39.  DeSoto, walking past his bike #26.  Below is the almost completed #39 bike!
The original factory fork legs are the same length as production fork legs but are machined very differently.  In 1974, the factory added 2″ to the overall length of the forks but the “machining” remained the same.
Factory Fork on the top
Factory Fork on the bottom
1972 Factory CZ250 Build
Falta’s 1974 bike.  Same machining but
notice the length!
1972 Factory CZ250 Build
1972 Factory CZ250 Build
The original factory fork leg protectors were located and later installed.
Miroslav Halm’s Factory 1972 bike.
The original pipe….with dents, was freshened up only.  The “Barum Tire” decals, as shown in the photo above (bike #39) was identified and reproduced by Clyde Williams of Old Dirtbike Warehouse. 

Factory CZ List

Factory Yamaha List

Factory Suzuki List

Factory Husqvarna List

Factory Honda List

Misc. Factory Bikes

Factory Kawasaki List

Filed Under: Bike Builds

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Vintage Motocross Works Bikes and Production Models
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