1975 “CUSTOM” CZ 250
The bike featured here is a special construction CZ250 centerport. This bike was built by Eric Johnson, owner of OLD S’Cool MX Restorations in California. If you are looking to have a quality built motorcycle done either to your specifications or showroom stock, OLD S’CooL can deliver either choice. Click here for their website: Old S’Cool MX Restorations
Eric shared the following about this bike and it’s construction. “I was approached by a gentleman who originally wanted a run of the mill, standard type CZ race bike. We talked about the initial details of the build until I realized, I would just be building another standard CZ. It was then I realized I didn’t want to do a stock type bike and had the thought of building him a special OLD S’CooL bike with some unique and rare features. I wanted the bike to look and be set up differently than any other CZ out there. Brainstorm…How about a Centerport Falta replica? I was already doing one of these unique CZ’s for my personal collection and thought he would be interested.
He was and thought it was a great idea to have a special bike as a racer and a collectible piece in a single unit. Centerport CZ’s are ultra-rare and highly desired among those that just have to have something akin to a factory works bike. So, here it is after 7 months of planning and building. The bike is basically a 250cc reed motor with a handmade center exhaust port exiting the authentic Falta cylinder like the works bikes. The frame is a NOS 513 series frame with a 1975 era rear sub frame assembly grafted onto it. Has 8″ of travel up front, 5″ in back through premium Ohlins shocks and a whole lot of neat parts in between. Billet triple clamps are Czech made from the motherland as well as the 8 oz all aluminum rear brake plate. Reed valve is a tried and true DH 4-pedal reed unit coupled with a 34mm Mikuni and boost porting. Electronic flywheel ignition by B.U.S. fires the plug magnificently. Engine starts on first kick every time! Excel rims, Buc’s spokes, Pro-Form Racing pipe and a premium CZ chain. Nice slim alloy fuel tank and a new Bertus period correct seat assembly top off the old school look of the bike.
Everything is brand new except the fork sliders, hubs and engine cases. The bike runs better than stock with a little extra pep. Five speed 250 Falta gear ratio transmission that shifts like butter with a dry clutch. All in all a great little CZ in which I thoroughly enjoyed taking on. You don’t see very many of these around”.
Van Maanen Motortechniek
Featured here is a special Construction CZ that is currently being built by my good friend Heddy Van Maanen in Holland. Heddy has been racing vintage motocross for several years in Holland and is building the ultimate CZ400
to race next season. Heddy is the owner of Van Maanen Motortechniek and is a master mechanic. His shop is
equipped to handle all your motorcycle needs. If you are ever in Holland, stop by and see his exceptional collection
of vintage motocross bikes.
We will be updating this page at each stage of this bikes construction…
The cases had to be machined to accommodate the increase in stroke. He is also using a 513 clutch with more fins.
Heddy is starting this project with new CZ cases and a longer stroke balanced crank which will decrease vibration.
on the plates. The cylinder head is being made by Jiri Starec in the Czech Republic. The cylinder will be
extensively ported Heddy in house. He will be using a 3mm aluminum base gasket and a 28mm copper head
Swingarm is special construction chromoly. The frame, also chromoly, is currently being constructed by Jiri Starec and should be ready by Feb. The frames geometry has been modified and we will include the particulars when it is completed.
Heddy has modified the forks extensively as well. The forks have marzocchi innerlegs and dampers /springs 4.4 kg/m and classic lower legs (old style 66) with bronze bearings inside. The top triple clamp is cast magnesium like the works bikes of past.
Shocks are made by Reiger and provide excellent damping in the rear.
Some of the bikes built by Heddy at Van Maanen Motortechniek.
Construction on the motor is complete. The displacement now is 440cc!
Additional photos to follow as Heddy completes this project
Heddy’s 2008/2009 race ready CZ 420cc
Construction Continues – Photos added 1/17/2010
Heddy has recently completed his CZ race bikes for the season.
Additional bikes built at Van Maanen Motortechniek June 2018
If you are looking for quality restoration work, this is where to go!!
1966 CZ 360 Twinport
Featured here is a 1966 CZ 360 Twinport. This is an ex-Dave Bickers bike straight from England. It still has his silencers on each pipe with a riveted plate saying “Supplied by Dave Bickers, Ipswich”. As you can see this is a fiberglass tank model. This bike has the correct metal front fender and fiberglass rear. The correct front hub has the smooth backing plate. Presently there is a larger model Jikov carburetor mounted on the bike. The bike has original solid footpegs, steel wheels and Barum tires. It has been left the way it is so as to preserve it in the form that Bickers raced it. This bike is part of the Brian Grade Collection.
1968 CZ360 Twinport
This pristine example of a 1968 CZ Twinport. It has been completely restored. This is a later metal tank model. The motor has a brand new piston, rod, crankshaft , and transmission. The correct front hub also has the right “smooth”
backing plate (no ridge as found on later CZs). The rear hub is still riveted and both hubs retain their original finish.
Steel 18” and 21” wheels with Barum tires, 2.75 x 21 front and 4.00 x 18 rear. Other original pieces include solid
footpegs, metal front fender, metal number plates, gas petcocks, Jikov carburetor, and correct handlebars. The
airbox and rear fender are fiberglass. This bike with its brand new motor has never been started. This bike is part
of the Brian Grade Collection.
“Custom” 1973 CZ 250
The current owner raced CZ’s back in the day and spent a great deal of time, effort and energy restoring and customizing this bike. The photos speak for themselves.
Top left to right: Andy DeLatorre, Ron Desoto, Robin Clark, 500cc desert pro(??), Bob Hershey
Bottom left to right: Danny Wilfong, Greg Robertson
‘ 71 or ‘ 72 (I think..)
Vitezslav Branda Collection
The following bikes are part of a large collection of CZ’s both production and “works” bikes belonging to Vitezslav Branda. Vitezslav is well know in the Czech Republic and production based, the second group are rare works bikes.
We hope to see more of Vitezslav’s collection in the future.
Thanks again Vitezslav!
1981 “Puki” CZ 380. In an effort to keep pace with the Japanese manufacturers, Puki , a CZ dealer in Italy, began modifying production CZ’s to offer to his customers. The only CZ parts used were the motors, which were tuned by Puki, the wheel hubs and chains. Everything else was Italian made…….very rare.
1970 CZ 380 Type 981. This bike is a special construction CZ raced by the owner of this collection in the European Championship of Veterans series.
1975 works CZ 380. This bike was raced by Russian GP rider Rybalchenko in the 1975 Motocross of Nations held in Sedlcany, Czech Republic. Rybalchenko placed fourth and eight in the race.
983 works CZ 250 Type 978. There were only about 10 to 20 of these bikes made and they were primarily for the National Team in Prague called “Dukla”
Russian rider Rybalchenko’s Factory CZ
More of Vitezslav’s Branda’s collection
Lionello Bottanelli was kind enough to share his brother Dino Bottanelli collection of CZ’s which he inherited a few years ago. Dino was an advet collector and was a member of an Italian CZ Club.