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Dr Racing 80cc Big Bore Kit for Vespa 50cc Four Stroke
https://www.scooterpartsco.com/ricambi/021-vespa/dr-racing-80cc-big-bore-kit-for-vespa-50cc-four-stroke
Dr Racing is a very well regarded Italian performance company that makes excellent products for everyday use. This is their big bore cylinder kit for the Vespa and Piaggio 50cc Four Stroke engine. There is a difference between a two valve engine and a two stroke engine. This does not fit two stroke engines.
DR Racing Evolution Big Bore Kit for Genuine Buddy, …
https://www.ebay.com/itm/154433567441
D.R. Racing Evolution 70cc big bore kit for the Genuine Buddy and Genuine Roughhouse 50cc scooters. Includes wristpin, rings, piston, cylinder, head and gaskets. The cylinder has five intake and one enlarged exhaust ports, and improved port timing.
DR Racing 70cc Cylinder Kit for Vespa, Piaggio 2 Stroke 70cc big …
https://www.scooterpartsco.com/ricambi/021-vespa/dr-racing-72cc-cylinder-kit-for-vespa-piaggio-2-stroke
D.R. Racing Evolution Big Bore kit for the Vespa ET2 and most other Piaggio 50cc 2T engines. D.R. Racing uses Minachrom, adding chrome in the cast iron and they last a long time Two ring piston, and a very good overall feel. Includes wristpin, rings, piston, cylinder, head and gaskets.
DR Racing Evolution 72cc Big Bore Kit for Genuine …
https://www.ebay.com/itm/165040096273
DR Racing Evolution 72cc Big Bore Kit for Adly Scooters $160.47 Free shippingFree shippingFree shipping 72cc 47mm BIG BORE CYLINDER KIT for GENUINE Buddy 50 Roughhouse R50 $140.58 Free shippingFree shippingFree shipping 90CC Cylinder Head Big Bore Rebuild Kit For Scooters Jog Minarelli Clone Motors $55.99 Free shippingFree shippingFree shipping
Big bore kit DR Racing 85cc smallframe Vespa
https://www.scootling.co.nz/onlineshop/big-bore-kit-d-r-85cc-smallframe-vespa.html
Big bore kit DR Racing 85cc smallframe Vespa NZ$249.00 In stock A good alternative if you're looking for a sizeable increase in torque without trying to …
DR350-441 BBK - ThumperRacing
https://www.thumperracing.net/index.php?route=product/product&product_id=102
In our testing we found the best solution for improving the power was with a bigger bore, leaving the valve train stock. The result is a kit that is affordable and reliable. We have done extensive lightening on the piston and piston pin for reliability, while increasing the displacement to 441cc.
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