Oil distribution blocks and external oil distribution systems comprising the same

An oil distribution block comprising:

• a rigid block body configured to be secured to a cylinder head of an engine;
• an oil inlet configured to be releasably coupled to a first oil distribution line or a fitting therebetween, receive oil therefrom, and route the oil to an inlet of a cooling passage of the cylinder head;
• and
• an oil outlet configured to be releasably coupled to a second oil distribution line or a fitting therebetween, receive the oil from an outlet of the cooling passage of the cylinder head, and route the oil to the second oil distribution line;
• wherein the oil inlet and the oil outlet are configured to threadably couple with the first and second oil distribution lines, respectively, or the fittings therebetween;
• and
• wherein the engine is a motorcycle engine and the cylinder head is a rear cylinder head of the engine.

An external oil distribution system for directing a flow of oil to and from cooling passages of front and rear cylinder heads of a motorcycle engine, the external oil distribution system comprising:

• front and rear cylinder head feed lines configured to transport oil to the cooling passages of the front and rear cylinder heads, respectively;
• a Tee fitting configured to receive and combine the oil from the cooling passages of the front and rear cylinder heads;
• a return oil line configured to transport the oil from the cooling passage of the front cylinder head to the Tee fitting;
• a rear oil line configured to receive the oil from the Tee fitting;
• a front oil distribution block comprising:
• a rigid block body configured to be secured to the front cylinder head;
• an oil inlet configured to be releasably coupled to the front cylinder head feed line or a fitting therebetween, receive the oil therefrom, and route the oil to an inlet of the cooling passage of the front cylinder head;
• and
• an oil outlet configured to be releasably coupled to the return oil line or a fitting therebetween, receive the oil from an outlet of the cooling passage of the front cylinder head, and route the oil to the return oil line;
• and
• a rear oil distribution block comprising:
• a rigid block body configured to be secured to the rear cylinder head;
• an oil inlet configured to be releasably coupled to the rear cylinder head feed line or a fitting therebetween, receive the oil therefrom, and route the oil to an inlet of the cooling passage of the rear cylinder head;
• and
• an oil outlet configured to be releasably coupled to the Tee fitting, receive the oil from an outlet of the cooling passage of the rear cylinder head, and route the oil to the Tee fitting;
• wherein the oil inlet and the oil outlet of both of the front and rear oil distribution blocks include threads configured to threadably couple with one or more of the front and rear cylinder head feed lines, the Tee fitting, the return oil line, the rear oil hose, or the fittings therebetween.