Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Cylinder Heads and Pistons

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Royal Enfield - Royal Enfield Motorcycles  - 350cc Alloy Cylinder Barrel

For lightness and better heat dissipation.

Please note that these cylinders have been through our own stringent 10 point check and rectified in various areas to ensure they are what we consider to be of an acceptable quality.

This now includes a steel insert for the thread between the pushrods to replace the standard helicoil.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One350 BarrelBarrel + Head/Base Gaskets

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Mikuni Conversion Kit (500cc)

Click here to see applications chart

Royal Enfield - Royal Enfield Motorcycles - 500cc Alloy Cylinder Barrel

For lightness and better heat dissipation.

Please note that these cylinders have been through our own stringent 10 point check and rectified in various areas to ensure their quality.

This now includes a steel insert for the thread between the pushrods to replace the standard helicoil.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One500 BarrelBarrel + Head/Base Gaskets

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Mikuni Conversion Kit (500cc)

Click here to see application chart

Royal Enfield - Royal Enfield Motorcycles - 535cc Alloy Cylinder Barrel

For lightness and better heat dissipation.

Please note that these cylinders have been through our own stringent 10 point check and rectified in various areas to ensure they are what we consider to be of an acceptable quality.

This now includes a steel insert for the thread between the pushrods to replace the standard helicoil.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One535 BarrelBarrel + Head/Base Gaskets

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Forged Pistons (500cc and 535cc)

Royal Enfield - Royal Enfield Motorcycles - Hi Compression Piston (350cc)

This piston gives approximately 8:1 compression and comes complete with with rings, gudgeon pin and circlips.

Available in Std, +10, +20, +30, +40, +60 and +80.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select OneStandard PistonPiston + 10Piston + 20Piston + 30Piston + 40Piston + 60Piston + 80

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Mikuni Conversion Kit (500cc)

Royal Enfield - Royal Enfield Motorcycles - Hi Compression Piston (500cc)

These pistons are American made, and give a compression ratio of approximately 9:1 with the head gasket fitted (9.5:1 without gasket).

They come complete with rings, gudgeon pin and circlips. Available in: +30, +40, +50, and +60 only.

Suitable for all 500cc Bullets from 1953, Electra (X) and Sixty five models

Note: If you are using the standard bottom end, we suggest you use a compression plate with this piston to lower the compression.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select OnePiston OnlyPiston + 2mm Compression PlatePiston + 3mm Compression Plate

Piston Oversize:Select One+30+40+50+60

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Forged Pistons (500cc and 535cc)

Royal Enfield - Royal Enfield Motorcycles - European Made Piston (500cc)

This piston is fitted as standard to late 90's European 500 Bullets.

It gives a compression ratio of approximately 6.5:1. It comes complete with rings, gudgeon pin and circlips.

Available in Std, +20, +40, and +60.

Suitable for all 500cc Bullets from 1953.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select OneStandard pistonPiston + 20Piston + 40Piston + 60

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Bighead Fixing Kit

Royal Enfield - Royal Enfield Motorcycles - Forged Pistons (500cc and 535cc)

After years of experimenting, we now have available some excellent quality English made forged pistons.

These were originally designed for our competition engines, but have now been refined to allow closer bore to piston clearance for road going Bullets.

This piston gives a compression ratio of 8.5:1 so is ideally suited for every day use or for those of you who want that extra bit of performance coupled with a strong robust, reliable piston.

These are available in 500cc standard and +20.

Or why not bore your 500 barrel to 87mm and fit our 535cc piston?

They come complete with rings, gudgeon pin and circlips.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One500cc Piston535cc Piston

Standard or Oversize:Select OneStandardOversize + 20

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - European Made Piston (500cc)

Royal Enfield - Royal Enfield Motorcycles - Big Bore Kit

Fits all Bullets, Electric Start and Sixty Five Models

Comprises of large bore cast iron or alloy barrel and completely redesigned piston to give a new engine size of 535cc with a choice of compressions.

This is a direct replacement for the standard barrel, but will also compliment the tuned cylinder heads that we offer.

Note: that the alloy barrels used in our big bore kits are the ones that have been through our 10 point quality check.

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - European Made Piston (500cc)

Royal Enfield - Royal Enfield Motorcycles - Electra Big Bore Kit and Forged Piston

Fits Electra and Electra X all models

Finally a big bore kit for the 500 Electra to take it out to 535cc.

It has taken a couple of years to develop but we now have a design and piston that performs well.

At a compression ratio of approximately 8.5:1 and the extra 35cc engine size it gives the extra performance you are looking for.

With the benefits of a strong, robust and reliable forged piston, it is an excellent improvement.

They come complete with rings, gudgeon pin and circlips.

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Hi Compression Piston (350cc)

Royal Enfield - Royal Enfield Motorcycles - Cylinder Head (Tuned)

Fits all Bullets except 1956-1962, Electric Start and Sixty Five models

We start with a brand new late model Indian made head (these use the hardened valve seats).

We reshape and gas flow to a 32mm (28mm on the 350cc) inlet port and fit English made phosphor bronze valve guides.

On the 500/535 the valves are specially improved nitrile treated with a larger 1.875" inlet.

The valves are specially profiled for better gas flow.

The 350 and 500/535 come complete with a superior design of spring arrangement, including alloy top collars, and improved split collets.

Supplied ready assembled.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One500cc kickstart models500cc electric start models350cc model

 

See Also:

• Royal Enfield Performance Tuned CYLINDER HEAD Assembly for 350cc Motorcycles with larger inlet valves and gas flowed ports allowing higher power

Royal Enfield - Royal Enfield Motorcycles - Bighead

Fits all Bullets except 1959-1963, Electric Start and Sixty Five models

We have bitten the bullet on this one and invested heavily in re-introducing the spectacular “Bighead” fitted on the 500 Bullets from 1959—1963.

This is an all English made product manufactured to a high quality using the original factory drawings.

It is available in the standard bighead form or with the massive inlet port to suit the 1.5” Grand-Prix carburettor fitted on the Fury.

These heads have many design advantages over the conventional heads including semi downdraft carburettor, rockers running on fixed spindles, 80 degree valve angles, superior valve and spring design with large inlet valve which all help to give an instant improved performance gain.

With its large fins and overall shape, it will enhance the look of the Bullet engine dramatically.

To convert the Indian made Bullets, you will need the standard bighead along with the fixing kit which comprises of everything needed to convert including valves, springs, rockers, covers, studs, gaskets, oil feed pipe, head steady and pushrods etc.

Select your choice from the drop down list below and click 'Check Price'.

Select Your Option:Select One500 Bighead500 Fury

 

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Titanium Valve Kit (500cc & 535cc)

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Cylinder Head (Tuned)

Royal Enfield - Royal Enfield Motorcycles - Titanium Valve Kit (500cc & 535cc)

These titanium valves have been designed for competition use.

The inlet has an improved profile and head diameter of 1.875" and weighs 52g (the original is 84g).

The exhaust weighs 44g (half the originals 88g).

They are finished in a low friction, wear resistant coating.

The kit is completed with copper beryllium valve seats, phosphor bronze valve guides, a superior design of spring arrangement, alloy top collars, bottom collars and split collets.

See Also:

• Royal Enfield - Royal Enfield Motorcycles - Royal Enfield Spares and Accessories for Royal Enfield 350cc and Royal Enfield 500 Motorcycles - Titanium Valve Kit (500cc & 535cc)