Kynast Parts

July 12, 2012

 KynastKynast  made in Germany by Kynast  Sachs 504, 508 engine

Kynast Otto Gmbh & Co. KG began in 1946 when Otto Kynast, pronounced “key-nest”, started a small hardware and household goods store in Badbergen. They began making steel tube products. The first bicycle was produced in 1950. By 1966, around the year that Otto Kynast died, they had made 1 million bicycles, and was the biggest bicycle factory in Germany. By 1985 Kynast had made 16 million bicycles. But sales slowed more and more in the 1980’s because of low cost, high quality Asian bicycle frames. Eventually Kynast was bought up by the huge conglomerate, Derby Cycles, after several bankruptcies. Read more Kynast History.

1979 Kynast Flying Dutchman

says “Otto Kynast Motorradfabrik”
(motorcycle factory) in W. Germany
















Flying Dutchman Ted Van Der Kolk

Flying Dutchman Moped and Bicycle, Inc was a company made by Ted Van Der Kolk Sr, at 509-511 E Broadway, Glendale CA 91205, one block west of city hall. Ted Sr. was the businessman and his son Ted Van Der Kolk Jr. was the mechanic.

Ted Sr. grew up in Holland (now called Netherlands). He had a moped shop there, as well as souvenir shops in the Dutch West Indies, before moving to California in 1972. He was already selling Sparta mopeds and bicycles in Holland. His shop in Glendale, just north of Los Angeles, was open from 1972 to 1991. John Cochran worked for Ted Van der Kolk Sr. for awhile, then later formed is own shop, T. and J. Inc, at 3518 Firestone Blvd, South Gate CA 90280, just south of Los Angeles. Later T and J (Ted and John) became Moped City, a few doors down, South Gate California.  Most of the Flying Dutchmans in Southern California came from those three shops. Besides teaming up with Van Der Kolk, John Cochran made one of the first moped expansion chamber exhausts, and employed Carlos Rodriquez as main mechanic at Moped City. John Cochran died in 2004. The “Flying Dutchman”, Ted Van Der Kolk, Sr lived until his late 90’s, and died in 2013. Ted Jr was alive at age 75, in 2017.

1980 Kynast Flying Dutchman KML 40 with a 1979 Sparta

1980 red Kynast Flying Dutchman KML 40
1979 black Sparta Flying Dutchman Deluxe


Sparta and Kynast: There are two makes of Flying Dutchman’s, Sparta (made in Holland) and Kynast (made in West Germany), pronounced “key-nest”. The Sparta Flying Dutchman models (front tank “Deluxe” aka “Buddy” and rear tank “Lucky”) are in Sparta.

Altogether about 5000 Flying Dutchmans, half Sparta and half Kynast, were imported and sold only at Southern California moped shops,  according to Ted Jr. That is why not many people outside of California have ever seen one.

All of the Kynast-made Flying Dutchman’s have the model name KML 40 on the sides of the one-piece black plastic engine cover. Their original speed was 40kph (25mph), but these US models are 30mph versions.

Euro models: The Kynast Euro models KML 40, KML 25, Bully 4000, Eurostar, and Kynast US model Flying Dutchman, share the same frame. It is apparently their own design, rather than a remake of an older design, since no other mopeds use it.  



Note that the Kynast Flying Dutchman KML 40 is different from the Dutch Airline KLM, even though they both fly with Dutch people on board.  


1977 red Flying Dutchman KML 40 with early style engine shroud

1977  Kynast KML 40
early style engine shroud

2012 Kynast KML 25 Euro model

2012 Kynast KML 25
Euro model, late shroud


Then and Now: At some point, the German motorcycle giant Hercules must have bought the machinery to remake the Kynast moped. Here it is 35 years later, at left, still with Sachs 504/1D one speed engine , restricted. Everything is powder coated, not chromed. It probably also has other modern amenities like sealed bearing wheels, and nylon lined cable housings.  




Kynast Flying Dutchman

79 Kynast, Sachs 504/1A, late style shroud

Flying Dutchman

Flying Dutchman

Above left, a candy red 1977 KML 40, with Sachs 504/1A, early style shroud.

Left, a white/green 1977-78 KML 40, with Sachs 504/1A, early style shroud

Bottom left, a dark silver 1979-80 KML 40, with a Sachs 508/AD 2-speed automatic engine, late style shroud.



Kynast KML40 left side

Kynast w/Sachs 508 left
has separate start and decomp cables, unlike the Sachs 504/1 or 505/1

Kynast KML 40 left side

Kynast w/Sachs 508 right
accessorized with:
Cateye turn signals kit
Denfield flip-up foot pegs

Kynast with Sachs 508 has lower start lever and upper decomp lever

Kynast with Sachs 508
has lower start lever and
upper decomp lever

Kynast rear brake area

Kynast rear wheel brake
Grimeca 90mm drum
brake inside sprocket
clevis style cable end











1978 Kynast Easy Rider
Minarelli V1 engine




Sachs 508 engine:

Sachs 508/A D engine "zwie gang automatik" two speed automatic

Sachs 508/A D engine
“zwie gang automatik”
two speed automatic

Kynast Flying Dutchman Sachs 508 - ID plate

Kynast Flying Dutchman
Sachs 508 engine ID plate
at top right, near dip stick

Sachs 508 right side

Sachs 508/A D right side
trans on R, magneto on L
unlike Sachs 504 & 505

Sachs 508/A D bottom

Sachs 508/A D bottom
cases split top to bottom,
fits same frame as 504,
two centrifugal clutches









Sachs 508 Instructions

Flying Dutchman – Ted Van Der Kolk Sr.
Sachs 508 Two Speed Instructions

This rare Sachs 508 two speed engine is not mentioned or listed in any of the common Sachs engines web pages, even in Germany. Most Sachs two speed moped engines in Europe and worldwide are manual shift. They have a left hand grip twist shifter, that says “0-1-2”. But the Sachs 508/A is fully automatic and has no shifter or shifter cable. The US requires mopeds to be fully automatic, but European countries do not, so the Sachs 508 is likely designed for the US market. It’s speculation why it is so rare and unknown, but maybe it was too late in the game. By 1980, US moped sales were much less than in 1978, the peak year of the moped boom, following the gas shortage of 1973-76.  

Sachs 508 Specifications

Sachs 508/AD Specifications: 38x44mm, 8:1 CR, 5000rpm max, 50:1 premix, helical teeth gears
Gear ratios: 1st 3.57, 2nd 2.09, final 2.82
Sprockets 16×44 (not 11×40), chain 084-1
Bing 85/12/104A carb, Bosch 6V23/15W magneto
Spark timing 1.75 +-0.25mm piston position BTDC
Point gap 0.4 +-0.05mm, plug Bosch W225T1
Exhaust 24mm, 420mm long
















Sachs 504 with 508 marking

Some 1978? Sachs 504’s have this 508 marking

One final note about the elusive Sachs 508. Some of the later Sachs 504/1A one speed automatic engines, said 508/ cast into the left side of the engine case, near where the start cable goes in. This suggests that maybe Sachs was trying to fit a two speed automatic transmission into the existing 504 engine case. Perhaps because that design failed, they had to re-design an entire new engine case, with the right and left sides reversed. That probably took an extra year or more, making it too late to become popular.

Kynast components:

  • 1977-79 Sachs 504/1A one-speed engine, 11 x 40 tooth sprockets, Bosch 6V27/10W magneto
  •     with Bing 85/12/101 carb (#52 jet, throttle needle, all metal float needle)
  • or 79-80 Sachs 508/AD two-speed engine, 16 x 44 tooth sprockets, Bosch 6V23/15W magneto
  •      with Bing 85/12/104A carb (#54 jet, no throttle needle, rubber tip float needle).
  • Exhaust: right side 24mm x 420 Sachs exhaust header pipe, clamp on tail pipe/muffler.
  • Lights: CEV bullet hi/lo beam head light, Merit tail light, Merit rounded rectangular switches.
  • Magneto: Bosch magneto. blue=ignition, yellow=lites, green=brake lite, grn/blk=b.l. ground
  • Spark plug: NGK B6HS, internal ignition ground, normally open brake light switches.
  • Wheels: 17 x 2.25 tires/rims, Grimeca hubs, 170 x 2.6 x 0.50 spokes (163 on L-rear), aluminum fenders
  • Brakes: Grimeca 90mm brakes, 11×1.0mm axles, special rear brake panel, clevis brake cable ends
  • Gas valve: right side Karkoma M16x1 female spigot back or compatible (can be down or left)
  • Gas Cap: quarter turn 30mm chrome, gasoline premix 50:1 (2% oil)
  • Controls: Magura wrap-around throttle with choke trigger right thumb and front brake right hand, Magura left start/brake lever assy (with decomp trigger left thumb on 508), start lever under bar left fingers and rear brake left hand.

Throttle cable length estimation from photos


Kynast throttle cable: Kynast throttle cable is shorter than other Sachs throttle cables, because the frame is slightly smaller. Kynast handlebars are 2 inches closer to the engine than Sparta Lucky (rear tank). Sparta Lucky handlebars are 2 inches closer than Sparta Buddy (front tank). 

Kynast brake cables: Kynast rear brake cable has clevis clamp (exactly the same as Hercules and AMF).