Spears Racing have developed a new, innovative Motorcycle Velocity Stacks Kawasaki Ninja EX400,Ninja EX300,Suzuki SV650,Yamaha R3 and FZ07/MT07 . This patent pending revolutionary design is backed by real dyno testing and our Corbin Custom Design engineering staff. Our stacks will improve torque/HP and smooth out power delivery. This allows the rider a truer feel for the throttle which enables more accurate throttle input, improves confidence to get on the throttle sooner and boosts rider confidence.
Dyno proven gains don’t lie! Developed in house on simulation software, the race track and hours on the dyno.
Spears Racing will remain transparent on all of the knowledge that will make your Motorcycle Velocity Stacks experience to be the best, unlike the vagueness of most of the other companies in the Little bike world.
“Never Copy…Always Create your own”
Let the Auto Tune Module upgrade for the Power Commander V deliver the kind of performance you can brag about. No matter what modifications you’ve made or the elevation you ride in, the Auto Tune Module is the accessory that brings it all together.
The OEM Air box of the stock “commuter bike” SV650 contains no stacks just manifolds , The lack of height of intake tracks which severely limit the air intake into the engine. This kit replaces both stacks with our own Spears Racing velocity stacks, manifolds and instructions to modify your current OEM air box. These velocity stacks not only allow more air into the engine, but they also smooth out the increased flow of air to really maximize the benefit.
The OEM Air box on the Ninja 400/500 contains two different length velocity stacks, one long, one short and two small intake tracks which limits the air intake into the engine, again remember this is a commuter designed motorcycle. This patent pending revolutionary design is backed by real dyno testing and our Corbin Custom Design engineering staff
The OEM Air box on the Yamaha FZ07/MT07/R7 Velocity Stacks contains two velocity stacks and a small intake tracks which limits the air intake into the engine, again remember this is a commuter designed motorcycle.
The OEM Air box on the Yamaha R3 contains two different length velocity stacks, one long, one short and a small intake tracks which limits the air intake into the engine, again remember this is a commuter designed motorcycle.
Dyno proven gains don’t lie! Developed in house on simulation software, the race track and hours on the dyno.
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International Postal service disruptions
International Mail Service Suspensions
Updated: Oct. 1, 2021
The Postal Service™ is temporarily suspending international mail acceptance for certain destinations due to impacts related to the COVID-19 pandemic and other unrelated service disruptions.
Suspension Due to Unavailability of Transportation
| Afghanistan | Guadeloupe | New Zealand** | Tajikistan |
| Australia* | Laos | Reunion (Bourbon) | Timor-Leste |
| Bhutan | Libya | Saint Pierre and Miquelon (Miquelon) | Turkmenistan |
| Brunei | Martinique | Samoa | Yemen |
| Cuba | Mayotte | South Sudan | French Guiana |
| Mongolia | Syria |
Customers: please refrain from mailing items addressed to the countries listed here, until further notice.
These service disruptions affect Priority Mail Express International® (PMEI), Priority Mail International® (PMI), First-Class Mail International® (FCMI), First-Class Package International Service® (FCPIS®), International Priority Airmail® (IPA®), International Surface Air Lift® (ISAL®), and M-Bag® items.
*Australia’s service disruption affects Priority Mail International® (PMI), First-Class Package InternationalService® (FCPIS®), Commercial ePacket (CeP), International Priority Airmail® (IPA®) packets, InternationalPriority Airmail® (IPA®) M-Bags, International Surface Air Lift® (ISAL®) packets, International Surface Air Lift®(ISAL®) M-Bags, and Airmail M-Bags.
**New Zealand’s service disruption affects Priority Mail International® (PMI), First-Class Package International Service® (FCPIS®), Commercial ePacket (CeP), International Priority Airmail® (IPA®) packets, International Priority Airmail® (IPA®) M-Bags, International Surface Air Lift® (ISAL®) packets, International Surface Air Lift® (ISAL®) M-Bags, and Airmail M-Bags.
Unless otherwise noted, service suspensions to a particular country do not affect the delivery of military and diplomatic mail.
