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Triumph valves & guides 650 750 unit twins Special Black 70-2904 70-4603 set

This product data sheet is originally written in English.


You will get the brand new set of intake and exhaust valves and guides. The valves are Britvalve the guides are made of the highest quality bronze, and hold the tightest accepted tolerance when your engine is up to operating temperature, unlike other guides on the market. This is the correct set for all unit 650 and 750, it will work also on 54 to 62 pre-unit. 

These guides are Phosphor Bronze which is the best material to use for guides on these Classic Bikes. Silicon Bronze which is the next grade up tends to wear out the valve neck so we stay away from it. With these bikes the Phosphor Bronze offers better lubrication and they live better in the aluminum heads." There are many opinions on this subject but this is our information after 30 years of testing in many different environments, and conditions. Contact us with any questions /
You will get the brand new set of intake and exhaust valves and guides. The valves are Britvalve the guides are made of the highest quality bronze, and hold the tightest accepted tolerance when your engine is up to operating temperature, unlike other guides on the market. This is the correct set for all unit 650 and 750, it will work also on 54 to 62 pre-unit.  These guides are Phosphor Bronze which is the best material to use for guides on these Classic Bikes. Silicon Bronze which is the next grade up tends to wear out the valve neck so we stay away from it. With these bikes the Phosphor Bronze offers better lubrication and they live better in the aluminum heads." There are many opinions on this subject but this is our information after 30 years of testing in many different environments,
Placement on Vehicle Left
Placement on Vehicle Right
Country of Manufacture United States
Brand Britvalve / Steadfast Guides
Manufacturer Part Number 70-2904 70-4603
UPC Does not apply
Surface Finish Black Oxide & Bronze Guides