This adapter is for keihin FCR carburetors that don’t use a bolt on adapter. If you have questions about fitment, send me a message with a photo of your carb.

Keihin FCR Adapter / Spigot for Trx450

For sale is an aluminum Allgeyer Performance Products carburetor adapter.  The adapter allows a Keihin FCR carburetor without the removable intake bell to be installed onto a trx450.

FCR’s without the removable intake are common on 4 stroke racing four-wheelers and dirt bikes. FCRs without the removable intake bell are identical internally to those with the removable intake bell, but can be obtained much cheaper. The adapter allows an FCR without the removable intake to be installed onto a TRX or other fourwheeler with the same performance increases as those doing the traditional swap. For those on a budget this is a great option.

Products have been specially engineered with the following features. 

·        Velocity stack to minimize turbulence of incoming air. 

·        Adapters can be used with FCR's of various bore sizes (for example 38, 39, 40, 41mm etc.).

·        All adapters have been tested to withstand normal operating temperatures and for gasoline resistance. 

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Parts are made in the USA and kits have been installed on over 200 motorcycles!

Feel free to send me a private message in case of questions. 

Check out my other FCR carb adapters for the DRZ400, DR650, and XR650 too! other items