50 CC bikes:

Picture Name Series Class Invitational Classes
  1989 Yamaha YSR 50 Yamaha YSR Stock 50/
Mod 50
  • Stock 50
  • Supersport
  • Superbike
  • 60 GP
  • Formula 60
  • Vets Mod
Yamaha YSR 50: Produced from 1987-1992. Can be pumped up to 64CC depending on class. The bike in the upper picture has aftermarket bodywork. Parts are readily available from numerous sources even though the bike is no longer in production.

 

Honda MB-5 Mod 50
  • Superbike
  • Big Wheel
  • 60 GP
Honda MB-5: Honda produced this air cooled bike for only a couple of years. Stock wheels are 18", but can be easily replaced. Allowed to be bored out to 64cc.

 

NSR50.jpg (36411 bytes) Honda NSR 50 Mod 50
  • Superbike  
  • 60 GP
  • Formula 60 
  • 80 Stock
Honda NSR 50: 12" wheel Honda. Water cooled. Must be imported from Japan. Engine Parts are shared with NS50F (U.S. model) and are readily available. Aftermarket body parts can be purchased in the US, but other misc parts must be imported from Japan. 

 

Stock_ns50.jpg (25134 bytes) Honda NS50F Mod 50
  • Big Wheel 
  • Superbike 
  • 60 GP
  • Formula 60
  • 80 Stock 
  • Vets

Honda NS50F: Honda built, water cooled 50cc bike.  Can be bored to a maximum of 52cc.  The stock NS has drum brakes front and rear (as you can see in the 1st picture).  The other bike pictured is an example of some modifications that can be made including aftermarket wheel and disc brakes. Parts are readily available at your local Honda shop.

Honda NS50R (not pictured): Similar to F model, but has disc brakes and "mag" rims stock. Is a race only import model that can be purchased through HRC.

 

Aprilia RS50 Mod 50
  • Big Wheel 
  • Superbike 
  • Formula 60
  • 60 GP 
  • 80 Stock
  • Vets 

Aprilia RS50:Water cooled 50cc bike, readily available at your Aprilia dealer.  Limited to 52cc. 

 

Honda XR 100 Mod 50
  • Big Wheel 
  • Superbike 
  • 60 GP
  • Formula Thunder
  • Mini TT

Honda XR 100: Yes, the ultimate kids dirt bike, the XR 100 is completely legal to run with us.  The engine displacement is limited to 100cc and  knobby tires should be replaced with streetable tires or slicks. Engine can also be transplanted into YSR chassis.

 

 Derbi GPR 50 Mod 50
  • Big Wheel 
  • Superbike 
  • Formula 60
  • 60 GP 
  • 80 Stock
  • Vets 

Derbi GPR50:Water cooled 50cc bike, readily available at www.derbiwest.com   Limited to 50cc .I can also be modified to 72 cc, 76cc to race in the 80 GP class. 

 

Metrakit 50 Mod 50
  • Big Wheel 
  • Superbike 
  • Formula 60
  • 60 GP 
  • 80 Stock
  • Vets 

Metrakit Mini GP 50:Purpose built race bike only 120lbs and 10 hp stock Could also modified to 72,76cc to race in the 80 GP class. Available through Cycle imports www.minigp50cc.com for $3,900   

 

Metrakit 50 Mod 50
  • Metrakit stock 50 
  • Superbike 
  • Formula 60
  • 60 GP 
  • 80 Stock
  • Vets 

Metrakit Mini GP 50XL:Purpose built race bike only 130lbs and 10 hp stock Could also modified to 72,76cc to race in the 80 GP class. Available through Cycle imports www.minigp50cc.com for $4,500   

 

 

80 CC bikes:

Picture Name Description
wpe41.jpg (20841 bytes) YSR 80 Any 80cc engine can be made to fit in a YSR chassis. Typical engines are KX, RM, YZ or CR.

There is also a Canadian model YSR 80 with a stock air cooled 80cc motor.

RM80.jpg (30144 bytes) RM 80/ KX 80/
CR 80
Super motard. Any 80cc dirt bike can be made into a super motard with some suspension modifications, wider than stock 17" rims and some slick racing tires.
mh80.jpg (31346 bytes) MH 80 This bike starts as a Japanese model Honda NS-1. A CR 80 engine is used in place of the stock 50. The chassis is then beefed up.  Contact HRC or MiyukiImports.com to find one. Has 17" wheels. Shares tires with an RS 125.
RS80.jpg (35372 bytes) RS125/80 This chassis is from a Honda RS125 GP race bike. The 125 engine has been removed and replaced with a CR 80.