It is sealed by a special O ring onto the front of the crankcase. As well as the main cooling water connection to the engine- it has a stub hose connection to the oil cooler. Due to their exposed location and often years of poor quality coolant- we do not see many engines in the workshop where these manifolds are fit for re-use. One photo here shows the common point of failure on the hose stub and a stack of scrapped manifolds that we were unable to re-fit to customers engines. These are no longer available from Honda- and used items are seldom fit for re-use.
We have reached the point where even otherwise decent engines that have been laid up for years- will have this manifold corroded and unusable. The solution for Honda CBR400 specialists GF Racing was to ask us to design and manufacture a replacement.Testing and final inspection was so good that we now supply these exclusively to them under their own branding. The manifold is CAD designed and CNC machined out of solid billet 6083 Aluminium.
After months of searching- we have finally found a company here in the UK that will produce these to our design and tolerances- a British made product! The manifold kit here also includes the correct, new O-ring- so this part is ready to fit. The item "Honda CBR400 NC29 Gull-Arm Front Cooling Water Manifold Kit New CNC Part" is in sale since Friday, August 23, 2019. This item is in the category "Vehicle Parts & Accessories\Motorcycle Parts\Engine Cooling Parts\Other Engine Cooling". The seller is "classic_bike_spares" and is located in BRIGG, Lincolnshire.This item can be shipped to United Kingdom, Antigua and barbuda, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, Grenada, French guiana, Iceland, Jersey, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Dominican republic, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, El salvador, Trinidad and tobago, Uruguay, Viet nam.