RTE 30.5cc Full Mod Engine - Piston Port

The RTE Full Mod 30.5cc engine is all new for 2025.

This engine has fully modified crankcases set up perfectly, all end float is set via bearing shims, not crank shims, and case porting is now completed in a mill, and finished match porting by hand. 

Beautifully hand-ported cylinder with Rooster Tails new special combustion chamber and new short spark plug (CMR7A).  Also a milled, modified and lightened piston that reduces friction and maintains compression at high rpm.  How can you beat that?

Also included is our new RTE Full Mod Crankshaft Seal Arrangement.  We have designed a new seal to stop vacuum leaks which cause dust ingression, which destroys engine bearings and cylinder plating.  Our new seal arrangement provides a very long life and a higher quality tune.

This engine also comes complete with the following upgrades:

• RTE Full Mod Carburettor WT-990
• RTE Full Mod Flywheel
• RTE Full Mod Crankshaft Seal Arrangement
• RTE Raptor Manifold Kit
• RTE Super Charger Velocity Stack
• RTE Super Flow Fuel Line Kit
• RTE High Temp Gaskets
• CMR7A Spark Plug
• Detailed Running In Procedure

If you can handle it, and you want to be out in front, you'll need the 30.5cc from Rooster Tail Engines.

Rooster Tail Engines are designed, hand built and professionally assembled by a qualified mechanical trades person with over 25 years experience in making high performance race engines, carburettors, and clutches.

The lead time can be up to 14 days, please email for an accurate time frame.

All workmanship on these high-performance engines is guaranteed.  The engines do not come with warranty.

Engine Upgrade Options

Clutch - Removed

Engine will not come with a clutch.

Clutch - Full Mod

Fully balanced and lightened steel shoes for long life and superior lock up.  Quicker response time and cooler running, will not fade under any conditions.