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AMERICAN
& AUSTRIAN MADE HP ENGINE PARTS
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Please
check your engine carefully.
Internal HP and WEBRA parts DO NOT interchange
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| Don't confuse
HB and HP engines... HB engines were produced in Germany
by Helmut Bernhardt Feinmechanik and had PDP, Blitz and Stamo
models. HP (Hirtenberger Patronen) engines were produced
in Austria and U.S.A. They have Gold Cup, Silver Star and VT
models. These two engines are completely different and no
parts interchange. |
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| Early HP Gold Cup
and late Silver Star .61... Early Gold Cups have a smaller rear
bearing, crankshaft and front housing with bearing I.D. measuring
15mm - .590"Ø. Use rear bearing, crankshaft and front
housing for silver star if you have this older version. Late
Silver Star .61 engines used larger 17mm - .670"Ø. rear
bearing. If you have this version use Gold Cup parts. |
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| Rotomix carburetor...
Early Gold Cup and Silver Star 61's used a barrel type carburetor
similar in design to a Perry. Later versions use a slide carb.
Parts listed are for the slide carb. Call if you need Rotomix
parts not listed. The complete carb (80-0101) listed is the
K.61 carb which fits the HP 61 perfectly and is sold as original
equipment on the new Silver Star .61's. |
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| Dykes and conventional
rings... A dykes type ring is "L" shaped and is located at the
very top edge of the piston. A conventional ring is flat or
square shaped and is located about 1/16" below the top edge
of the piston. Click here
for more details on rings |
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