100cc (80 actually) big bore kit.

[mountain80]

Has anyonseen or tried the new 100cc bolt on kits for china girl? Not talking a bout the YD one piece cylinder/ head but just the cylinder/ piston kit that is 49 mm and you add you're own head. Looks interesting and I saw them for about 40 bucks on ebay

100cc Motor Engine Cylinder Piston Pin Kit For Motorcycle Motorized Bicycle Bike | eBay

100cc Engine Motor Cylinder Piston Pin Set For Motorized Bicycle Bike Motorcycle. This is a cylinder for a 100cc motorized bicycle engine. Fit: 100cc Motorized Bicycle Bike. 1 x 100cc Engine Motor Cylinder Piston Pin Set.

www.ebay.com

 

[mony0_3]

Have 3 of them, The ports will need a lot of cleaning. They produce more torque than the YD100.

 

[Chainlube]

Has anyonseen or tried the new 100cc bolt on kits for china girl? Not talking a bout the YD one piece cylinder/ head but just the cylinder/ piston kit that is 49 mm and you add you're own head. Looks interesting and I saw them for about 40 bucks on ebay

100cc Motor Engine Cylinder Piston Pin Kit For Motorcycle Motorized Bicycle Bike | eBay

100cc Engine Motor Cylinder Piston Pin Set For Motorized Bicycle Bike Motorcycle. This is a cylinder for a 100cc motorized bicycle engine. Fit: 100cc Motorized Bicycle Bike. 1 x 100cc Engine Motor Cylinder Piston Pin Set.

www.ebay.com

Funny thing on that listing, they never show a picture of the intake side. A couple little glimpses, but no straight on shot.

 

[mony0_3]

Funny thing on that listing, they never show a picture of the intake side. A couple little glimpses, but no straight on shot.

It has a 40mm intake. The steel sleeve needs a lot of porting, the ports are smaller than the cylinder ports.

 

[Chainlube]

It has a 40mm intake. The steel sleeve needs a lot of porting, the ports are smaller than the cylinder ports.

Thanks for the info.

 

[Karl Snarl]

Just slapped one on a case yesterday. Ports need matched or enlarged. Other than a few minutes with the die grinder, its all good. Waiting on a saw carb to finish the engine. I plan on abusing it with nitropropane.