Quick index.
Head jobs.
Performance cylinder head modifications.
Big bore kits.
Big bore 955cc piston & cylinder kits for 916's. 
Performance Camshafts.
Camshafts to enhance the performance of all Otto Valvolo Ducatis
Corvino engine valves.
Large diameter valves for heavy breathing 4 valvers.
Adjustable cam pulleys.
for precision setup of camshaft  timing.
Aerodynamic crankshafts.
Lightened, balanced & polished cranks for all belt Ducatis.
Freccia Exhausts
 Stainless 50mm Italian Exhausts
Ordering.
How to order & pay for your Epicycle Go Fast parts.

EPICYCLE PERFORMANCE ENGINE COMPONENTS.

* Click on images surrounded by a blue border for detailed view.*

Ducati performance cylinder head modifications.

The cylinder head is often overlooked as a potential source for power improvement with pipes, cams and big bores often the only items to receive attention. Combustion chamber & port shapes are an integral part of the power improvement path. 

Let Epicycle's knowledge & experience in all things Ducati work for you. We can re-engineer your 8 valve cylinder heads to specifications that will deliver the performance characteristics that best suit your needs.

We also have specifications & drawings for all the Corsa cylinder heads since 1990.
 
 

 

Epicycle Ducati 4V Performance Camshafts 

These Epicycle camshafts have been designed using the latest in CAD (computer aided design) software from data acquired during many track & dyno hours. 
The cam blanks are precision CNC machined from chrome-moly barstock   prior to the grinding of the cam lobes & journals. Final operations involve, adding the keyway, drilling oil & lightening holes and  nitriding, a heat treatment process which imparts a  tough wear resistant surface to the finished cams. 

Circolo Camshafts Set.
Suitable for the sporting road rider. Reliability is not compromised.

	LIFT at valve	DURATION @ 1mm lift
Primo Inlet	10.75mm	304°
Veloce Exhaust	8.75mm	294°

Sportivo Camshaft Set. 
Suitable for club racing, ride days or spirited road riding. Reliability is not compromised. 

	LIFT at valve	DURATION @ 1mm lift
Primo Inlet	10.75mm	304°
Primo Exhaust	10.1mm	288°

Forza Camshaft Set. 
Suitable for racer with strong hands & grip. 

	LIFT at valve	DURATION @ 1mm lift
Potenza Inlet	12.1mm	303°
Primo Exhaust	10.1mm	288°

 
All camshafts are delivered with detailed timing & fitting instructions. Advice on piston machining requirements is available on request. 
 

Part No:	Primo In	Price
	Primo Ex	Price
	Veloce Ex	Price
	Potenza In	Price

 

 Epicycle Vernier Adjustable Pulleys 

 

Epicycle adjustable cam belt pulleys are available for all belt drive Ducatis. These pulleys have multiple vernier keyways for their adjustment, so they're positively located to the camshaft via the keyway, just like the original items. 

Once the timing is set and recorded, it's a simple matter to change the cam timing without resorting to degree wheels and dial indicators again. Just look up the timing chart and then position the key in the correct keyway in the pulley and the job's done. Imagine how beneficial that would be at the dyno or race track. 

Pulleys are available on an exchange basis, so just send us a set of pulleys in good condition, and in return we will mail you a set of vernier machined pulleys complete with easy to follow timing chart. 

Part No:

VerniPulley

Price

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Corvino Valves

Corvino valves are designed with waisted stems for high flow characteristics coupled with very light weight without resorting to expensive, exotic materials. Our valves are CNC machined from imported blanks then Tufftrided for high wear resistance and low guide friction. All Corvino valves feature a specially designed collet groove to suit our Duro collets. 

Corvino valves are available in the following sizes: 

916 Inlet....34mm, 35mm, 36mm & 37mm. 
916 Exhaust....30mm, 31mm.
748 Inlet....33mm, 34mm, 35mm & 36.
748 Exhaust....29mm, 30mm & 31.

Duro collets are designed to withstand the stresses induced by high RPM coupled with the high valve lift and acceleration afforded by desmodromic valve actuation. 

Duro collets are machined from hardened tool steel, are square in section and don't suffer the breakages normally associated with the factory round wire items. Valve clearances remain within tolerance for up to 3 times the engine hours of the factory items. 
 
 

Part No:

Duro

Price

 

Valve guides 4V

 

Epicycle  valve guides are manufactured from a wear resistant aluminium bronze alloy. The port end of the guide is more tapered than the stock items so they present less of an obstruction to the airflow. They are available in the standard sizes and also in a range of oversizes should the guide bores be damaged.
Special oversizes are available on request up to a maximum diameter of 12.5mm. 
Retail price is nearly half the price of the genuine Ducati item.

Epicycle now stock 4V valve stem seals at about 25% of the cost of genuine items. These stem seals are manufactured by the same company that supplies the Ducati items.

 

Part No:

4VGseal

Price

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 Stepped Keys 

 

Epicycle also carry a range of stepped camshaft keys to complement our vernier pulleys. 
They are available in the following crankshaft degrees: 2 & 4 degree steps. 

Part No:

Stepkey2D, 4D

Price

 

Ducati 955 Big Bore kits. 

High quality forged, high compression 96mm piston & nikasil cylinder kits to increase the capacity of your 916 to 955cc. Pistons are supplied with lightweight 20mm little end pins to suit all Stradas. Pistons weigh 434grams, 36 grams lighter than the standard Strada items. 

Advise us what valve sizes, cam types and timings you are using and we can machine the pistons ready for you to install. 
Strada cases will require machining prior to fitting of this kit. 
All gaskets are included in the kit.

With one of these babies installed, your engine will not only run smoother, but it will also rev harder, accelerate faster & produce more power. 
AEROcrank's unique wedge design allows for maximum weight reduction whilst still maintaining good inertial characteristics coupled with minimum windage drag. Individually lightened & dynamically balanced to suit your engine specification. 

The end result...... your mates will appear smaller & smaller in your mirrors. 

We do not offer AEROcranks on an exchange basis as we cannot guarantee the quality of the exchange crankshafts. All work may be carried out on your own crank, or alternatively, we can supply new cranks to the same specification. 

American manufactured Carrillo™  connecting rods for 888 & 916 engines. A must when increasing the power output of your 4 valver. 
These rods are CNC machined from solid stock, so they're strong, accurate for dimensions & weights as well as being light. This decrease in rotating & reciprocating weights means more power at the rear wheel. 

Little known fact;
The reciprocating weight (little end) of the Carrillo rod is the same as Titanium Pankl rod though the rotating weight (big end) is slightly higher. Machine the equivalent big end weight difference from the flywheel & you achieve the same result performance wise as Titanium Pankls at about 1/3 the cost.

We supply  20mm (strada) & 21mm (SP & Corsa) little end rods. 

Italian made exhaust system in 50mm stainless steel tubing with oval carbon fibre mufflers. 
System is closely modelled on the successful Arrows system & comes complete with manifold flanges, springs & mounting straps. 

Part No:

Freccia

Price

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