P J Motorcycle Engineers LTD Aprilia RX125 Engine Top End

You Are Here: Online Parts Store > Road Bike Parts > Aprilia Parts > Aprilia RX125 Old > Aprilia RX125 Engine Top End

Cylinder Re-Sleeving

Cylinder Re-Coating

Cylinder Re-Boring

Crankshaft Rebuilding

Thread Repairs

Engine Rebuilding

Job Packing

Dellorto Needle Circlip

£1.10£1.32find out more

Yamaha RD125LC Clutch Cover Gasket

£4.50£5.40find out more

Aprilia RS4 50 Giannelli Exhaust System

find out more

AP0650131 Aprilia Centre Crank Case Gasket

£6.50£7.80find out more

Suzuki RGV250 Samco Hose Kit

£107.33£128.80find out more

Gunk Engine Degreasant Spray

£7.24£8.69find out more

Suzuki GT750 Full Gasket Athena Top Qualty

£55.00£66.00find out more

Aprilia RX125 Engine Top End

Aprilia RX125 Mitaka Piston Kit

Mitaka Piston kit to fit a Aprilia RX125 ROTAX 122 & 123 type Engines

This is a Mitaka Piston kit made in Taiwan and is Budget piston but of very good quality. Piston kit contains piston, piston rings, gudgeon pin and 2 circlips.

Please Note Our Kit comes with the More Expensive "Riken" Racing Piston Rings Piston Rings Some Other Sellers Are Offering

The piston has a coated piston skirt For lower friction.

This Piston Is Suitable For Road Use

Piston Size is 53.97mm

Price: £34.03 (£40.84 Including VAT at 20%)

Quantity:

Aprilia RX125 Oversize Mitaka Piston Kit

This is an oversize piston kit for the Aprilia RX125, Fits Both 123 and 122 Type Engines.

This piston is to be used in a cylinder fitted with a cast iron sleeve or sometimes called a "steel liner"

Note you cannot just rebore a STD plated cylinder and use this piston! It must run in a cast-iron bore.

Price: £35.00 (£42.00 Including VAT at 20%)

Quantity:

Aprilia RX125 Wiseco Piston

Wiseco Piston kit to fit a Aprilia RX125 ROTAX 122 & 123 type Engines

This is a Wiseco Piston kit made in The USA, The Piston is Forged For Better Strength.

Piston kit contains piston, piston rings, gudgeon pin and 2 circlips.

This Piston Is Suitable For Road And Racing Use

Choose Grade

Piston Size 53.95

Piston Size 53.97

Price: £110.00 (£132.00 Including VAT at 20%)

Quantity:

Aprilia RX125 Vertex Piston kit Twin Ring Std Type

Vetex Piston Kit For The Aprilia RX125

This Piston Is A Direct Replacment For The Std Item With 2 Piston Rings

Vertex Pistons Are Made In Italy With A Molybdenum Coating,

Please Choose Piston Size

53.97mm Vertex A Grade

53.98mm Vertex B Grade

53.99mm Vertex C Grade

Price: £66.50 (£79.80 Including VAT at 20%)

Quantity:

Aprilia RX125 Vertex Race Piston Kit Single Ring

Vetex Piston Kit For The RX125 Race Piston Single Ring

This Piston Is A Direct Replacment For The Std Item With 1 Piston Ring, Really Only For Race Use !

Vertex Pistons Are Made In Italy With A Molybdenum Coating,

extending the coating.

Price: £64.99 (£77.99 Including VAT at 20%)

Quantity:

Aprilia RX125 MITAKA CYLINDER KIT ( ROTAX 122)

This is a cylinder for the Aprilia RX125 Rotax 122 Type from 1997- Onwards

The kit comes with Nickasil plated bore, Piston, Piston Rings, G-pin, C-clips, Small End Bearing, 3 Base Gaskets, Cylinder Head O rings, Power Valve Gaskets and Power Valve Seal

Mitaka Cylinders Are Made in Taiwan and are a Direct Copy of the Original Cylinder

Price: £169.36 (£203.23 Including VAT at 20%)

Quantity:

Aprilia RX125 MITAKA CYLINDER KIT ( ROTAX 123)

This is a cylinder for the Aprilia RX125 Rotax 123 Type up to 1996

The kit comes with Nickasil plated bore, Piston, Piston Rings, G-pin, C-clips, Small End Bearing, 3 Base Gaskets, Cylinder Head O rings, Power Valve Gaskets and Power Valve Seal

Mitaka Cylinders Are Made in Taiwan and are a Direct Copy of the Original Cylinder

Price: £169.36 (£203.23 Including VAT at 20%)

Quantity:

Aprilia RX125 Vertex Race Flat Top Piston Single Ring

Vetex Piston Kit For The RX125 This Is A Flat Top Single Ring Piston Kit.

ONLY FOR USE WITH A VHM FLAT TOP CYLINDER HEAD!

Vertex Pistons Are Made In Italy With A Molybdenum Coating,

extending the coating.

Piston Size Is 53.97mm This Is The Only Size This Piston Comes In
Price: £64.99 (£77.99 Including VAT at 20%)

Quantity:

Aprilia RX125 Wiseco Flat Top Single Ring Piston Kit

Wiseco Piston Kit For The RX125 This Is A Flat Top Single Ring Piston Kit.

A Forged Performance Piston From Wiseco

ONLY FOR USE WITH A MODIFIED OR VHM FLAT TOP CYLINDER HEAD!
Price: £74.00 (£88.80 Including VAT at 20%)

Quantity:

Aprilia RX125 Piston Rings For Genuine Aprilia Piston

This Is A Set Of 2 Pistons Rings For A Genuine RX125 Aprilia Piston.

NOTE THESE WILL ONLY FIT THE STD APRILIA PISTONS
Price: £31.00 (£37.20 Including VAT at 20%)

Quantity:

Aprilia RX125 Piston Ring For Single Ring Pistons

Replacement Piston Ring To Fit The Vertex, Mitaka, Wiseco Single Ring Pistons
Price: £8.93 (£10.72 Including VAT at 20%)

Quantity:

Aprilia RX125 Piston Rings For Mitaka,Vertex, Wiseco Pistons

This Is A Set Of 2 Piston Rings To Fit The RX125 Piston.

These Rings Fit The Following Pistons Vertex Twin Ring, Wiseco, Prox, Mitaka

THESE RINGS DO NOT FIT THE APRILIA PISTON
Price: £17.86 (£21.43 Including VAT at 20%)

Quantity:

Aprilia RX125 Small End Bearing

This will fit both the Rotax 122 and 123 Motor

Our small end bearings are made in Japan by Koyo the same manufacture that makes them for Aprilia !! So the quality is guaranteed.

Also Fits The Polini Big Bore Piston
Price: £4.25 (£5.10 Including VAT at 20%)

Quantity:

Aprilia RX125 Top End Gasket Kit Rotax 122 Type

Aprilia RX125 Top end gasket kit for Rotax 122 type engines, From 1997-2007

Kit contains 3 base gaskets, Inner and outer O-rings for the cylinder head, Reed gasket, power valve gasket, and exhaust gasket.
Price: £12.16 (£14.59 Including VAT at 20%)

Quantity:

Aprilia RX125 Top End Gasket Set Athena

Top End Gasket Kit For The Aprilia RX125 Rotax 122 Type 1997-2009

This Kit Is Made In Italy By Athena And Is A Better Quality One Than The Budget One We Sell Which Is Made In Taiwan. "Why is it better i hear you say" Well the gaskets are made from the same materiel & in the same factory as the original aprilia ones, the gasket material is better than the Taiwanese one and fits much nicer.

Price: £17.01 (£20.41 Including VAT at 20%)

Quantity:

Sorry Out Of Stock

Aprilia RX125 Top End Gasket Kit Rotax 123 Type

Aprilia RX125 Top end gasket kit for Rotax 123 type engines, From 1992-1996

Kit contains 3 base gaskets, Inner and outer O-rings for the cylinder head, Reed gasket, power valve gasket, and exhaust gasket.
Price: £12.16 (£14.59 Including VAT at 20%)

Quantity:

Aprilia RX125 Cylinder Inner O-Ring

Replacement Inner O-ring To Fit The Aprilia RX125, Fits Both Rotax 122 And 123 Type Engines.

This O-Ring Goes Between The Cylinder And The Cylinder Head.

Price: £4.29 (£5.15 Including VAT at 20%)

Quantity:

Aprilia RX125 Piston Circlips

Set Of Replacment Circlips For The RX125 Piston

These Will Fit All Makes Of Piston

PRICE IS FOR A PAIR OF CIRCLIPS
Price: £2.00 (£2.40 Including VAT at 20%)

Quantity:

Aprilia RX125 Polini Big Bore Kit 154cc

Polini Big Bore Kit To Fit Both RX125 Engines ( Rotax 122&123 Type) 1995-2009

The kit is supplied with Cylinder 60mm, piston, piston rings, G-pin, C-clips, Cylinder head, Gaskets, Bolts/ washers and fitting Instructions.

You will need to Re Jet Your Carburettor and you would be best fitting a 34mm carburettor to get the best out of this kit.

YOU SHOULD ALSO KNOW THAT POLINI OFFER NO WARRANTY WITH THERE PARTS AS THEY ARE FOR "COMPETITION" USE ONLY" SO PLEASE BEAR THIS IN MIND WHEN MAKING YOUR PURCHASE

Note There Is No Small End In The Kit.

Price: £428.88 (£514.66 Including VAT at 20%)

Quantity:

Aprilia RX125 Polini Replacement Piston Kit

This is a Replacement Piston Kit For the Polini 154cc Big Bore Kit 60mm Bore.

Piston kit contains piston, piston ring, gudgeon pin and 2 circlips.
Price: £63.54 (£76.25 Including VAT at 20%)

Quantity:

Aprilia RX125 Polini Replacement Piston Rings

This Is A Set Of 2 Pistons Rings For The Polini Big Bore Piston.
Price: £19.50 (£23.40 Including VAT at 20%)

Quantity:

Sorry Out Of Stock

Aprilia RX125 Polini Replacement Top End Gasket Kit

This is a Replacement Top End Gasket Kit For the Polini 154cc Big Bore
Price: £19.50 (£23.40 Including VAT at 20%)

Quantity:

Aprilia RX125 Powervalve Blade

Power Valve Blade For The Aprilia RX125, Fits Both Rotax 122 And 123 Type Engine
Price: £41.00 (£49.20 Including VAT at 20%)

Quantity:

Aprilia RX125 VHM Racing Cylinder Head Flat Flat Top Piston Only

This is a VHM Cylinder Head For Ues With The A Flat Top Piston Only

The Cylinder Head Is Made From Billet Alloy.
Price: £76.00 (£91.20 Including VAT at 20%)

Quantity:

Aprilia RX125 VHM Racing Cylinder Head For Use With A Std Dome Piston

This is a VHM Cylinder Head For Ues With The Std Dome Piston.

Gives Better Heat Transfer Than The STD Aprilia Cyl Head.

The Cylinder Head Is Made From Billet Alloy.
Price: £76.00 (£91.20 Including VAT at 20%)

Quantity:

Aprilia RX125 Denso Iridium Power Spark Plug

Denso Iridum Power Spark Plug To Fit The Aprilia RX 125cc NGK Equivalent BR10EIX

Denso Iridium Plugs

DENSO’s patented iridium alloy is extremely tough and wear-resistant. This makes it possible to produce a spark plug with a centre electrode of just 0.4 mm. Denso Iridium spark plugs give a stronger spark and better ignition performance in all areas of driving. These plugs can withstand even the most severe conditions and have proven themselves in original equipment and racing. This product gives DENSO the leading position in Iridium Spark Plug technology.

Iridium Power Range

These Denso plugs are the obvious choice for any one looking for a fast, easy and effective way of enhancing and improving the performance of your engine. Utilising the revolutionary 0.4mm center electrode technology, the Iridium Power plugs can make an immediate difference to your bhp, fuel efficiency and cold starting.

.
Price: £12.99 (£15.59 Including VAT at 20%)

Quantity:

People who bought this item also bought:

1. Aprilia RS125 Carb Main Jet Dellorto 6mm

2. Aprilia RS125 Aluminium Fuel Tank Bolt

3. Aprilia RS125 Rear Brake Pads 1992-2005

Aprilia RX125 NGK Spark Plug BR10EG

NGK Racing Spark Plug BR10EG
Price: £6.49 (£7.79 Including VAT at 20%)

Quantity:

People who bought this item also bought:

1. Stop And Tail Bulb 12v 21/5w

2. Instant Gasket Clear

3. Wuth Carb and Injector Cleaner

Aprilia RX125 NGK Spark Plug BR10EIX

NGK IRIDIUM Spark Plug Offers,Enhanced Igniton Efficiency, Better Acceleration,Faster Starting & Smother, Running, Longer Life
Price: £9.74 (£11.69 Including VAT at 20%)

Quantity:

People who bought this item also bought:

1. Aprilia RS125 Carb Main Jet Dellorto 6mm

2. Fuel Filter 7mm

3. Aprilia RS125 Powervalve Blade