Modified Carbs and Fuel

NEW Pro-Modified Walbro WT-644 Carb

We Pro-Modified this carb for improved air stability and increase engine performance.

Flows better than a stock WT-257 at an economical lower cost

Re-shaped and polished entry to smooth incoming air flow

Venturi enlarged from 12.7mm to 13.7mm to increase Flow and Velocity

Stainless screws and carb gasket included.

Get Instant throttle response and more power with this bolt-on.

Walbro WT-257 Carb

Modified to enable better air flow and fuel distribution

The Intake of the carb has been machined to a bell shape and the venturi opened up from 12.7mm to 13.7mm.

This modification increases RPM and Power over a stock WT-257 carb.

Dr Buck's 500ml Fuel Bags 

You get 2 Bags per Order

 Holds 500ml (16oz) of Fuel

Made of a flexable type of vinyl / plastic that doesn't get hard like the Baxter IV Bags and doesn't get soft and leak like the Secure IV Bags. We use this on all of our Pro Modified RC Racing Engines.

This fuel bag stays flexable with hot or cold temperatures, does not get hard and crack, has two lines for fuel or you can use one for a fill and the other one goes to carb.

 Does not need to be vented and the bag collapses as the fuel is being used.

 The bag also has two areas that are for mounting on the sides