Moisture in your brake fluid will give impaired performance & can be dangerous. This simple tester will check the percentage of water in your fluid, indicating when to replace it. Gunson 77002  Brake Fluid Tester is a simple & effective tester shows the condition of the brake fluid with a coloured response.
- Test percentage of water in the brake fluid
- Immerse the probe end of the tester into the brake fluid
- use regularly for brake maintenance
- Green indicates
- Yellow indicates 1.5>3%water = marginal
- Red indicates 3%





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Multiple carburettors need to draw in an equal amount of air to work efficiently. Listening to the sound of suction through a length of hose is time consuming &, depending on the ear, not necessarily that accurate. Carbalancer is accurate with its graded readout providing an instant comparison between carburettors. Works with Weber, Dellorto, SU, Amal & many others. Gunson G4053
- Carbalancer Internal combustion engines use a mixture of air & petrol to generate their power. The performance therefore is influenced by the air flowing into it & the petrol that is metered out by the carburettor. Unless the air flow in Twin or Multiple carburettors is correctly set, the correct mixture adjustment is unlikely to be achieved. Suitable for use on SU, Solex, Auto-Lite (Formoco) Stromberg, Weber & Zenith & can be adjusted to fit most carburettors including side-draught, down-draught with air intakes (Venurei) from 25mm to 67mm (1”-2”) diameter
- Easy read scale indicates the air flow & allows
- Provides smoother & better acceleration
- Carbalancer can be adjusted to fit most carburettor
- Easy to follow instructions




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Gunson G4094
- Clik-adjust Tappet Adjuster with micrometer accuracy ensures valves (both inlet & exhaust) open & close correctly
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3 sizes of Compression Tester adaptor for specific automotive applications: 10mm, 12mm & 18mm. They convert the thread on Colortune & Hi Gauge Comp & extends the use of your compression tester.
- 10mm Thread

Size: Suitable for most modern & classic cars.
- 12mm Thread

Size: Ideal for Two Stroke motorcycles & classic motorcycles
- 18mm Thread

Size: for 18 mm plug holes & Ford OHC engines See the How do I adjust the carb on my vehicle ? article in the Technical Articles section








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3 sizes of Compression Tester adaptor for specific automotive applications: 10mm, 12mm & 18mm. They convert the thread on Colortune & Hi Gauge Comp & extends the use of your compression tester.
- 10mm Thread

Size: Suitable for most modern & classic cars.
- 12mm Thread

Size: Ideal for Two Stroke motorcycles & classic motorcycles
- 18mm Thread

Size: for 18 mm plug holes & Ford OHC engines See the How do I adjust the carb on my vehicle ? article in the Technical Articles section








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Save pound’s by having the correct fuel mixture. Tests proved that Colortune can save petrol by enabling you to correctly adjust the fuel mixture at the Carburettor. It actually provides a window into the combustion chamber as the engine runs, so you can adjust the colour of the combustion flame. Pays for itself in petrol savings. ...

Save pound’s by having the correct fuel mixture! Fuel mixture adjustment can be a hit & miss affair. Not with Colortune. This easy-to-use tool temporarily replaces one spark plug at a time providing a window into each individual combustion chamber. Adjust the mixture with the engine running until the correct bunsen blue combustion colour is achieved – job done. Works on carburettor fed & fuel-injected engines. Pays for itself in petrol savings. Its unique design maintains compression while the engine runs & ensures correct firing of the mixture. Gunson G4074 Colortune Single Plug Kit (14mm thread) fits most standard petrol engines. Colortune adaptors are also available. See the How do I adjust the carb on my vehicle ? article in the Technical Articles section ...

Eezibleed kit is an Automatic Hydraulic Brake & Clutch Bleeder Kit. A clever little bleeder that uses the pressure in your spare tyre to bleed air & old fluid from your hydraulic system. Eliminates the need for a helper as you no longer need to pump the pedal. Just connect the Eezibleed as instructed then open each bleed valve in turn until new fluid starts to flow through. Makes a slow messy job quick & easy. Eezi-bleed is supplied with a variety of caps to fit different master cylinders. M519 Gunson Eezi-bleed Multi-Purpose Cap may be required for non-screw type reservoirs. Gunson G4062
- Eezibleed Kit
- This system sets the standard for affordable brake & clutch bleeding systems. Using air pressure from a spare wheel it will effortlessly bleed hydraulic systems. There are a number of adaptors available to fit most vehicles with screw cap reservoirs, & comprehensive instructions are included.
- Suitable for one man operation
- Uses the air pressure from a spare tyre to effortless bleed hydraulic systems
- The Eezibleed kits contains a special pressure vessel to hold the new fluid
- Can be used successfully on the following systems: Tandem master cylinders without sensors Tandem reservoirs, Slave servos, Vacuum Servos
- Easy to follow instructions






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Gunson 77042 Multi Purpose Cap for Eezibleed fits reservoirs up to 67mm & is suitable for most non-screw reservoirs caps (bayonet) or awkward sized screw caps. It is held in place with a strap, which passes under the reservoir.
- Enables use on a wider range of vehicles
- Provides clamp like grip
- Can be used on all brake fluid reservoirs which have any shape opening up to 8cm
- Time saver
- Makes Eezibleed more universal for any vehicle inc




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Lapping in valves by hand is a laborious process – particularly if the head has more than two valves per cylinder. This drill-mounted valve lapper grips & turns the valve stem producing a gas-tight seal 60 times faster than you can do by h&. It fits all drill chucks 8mm (5/16") or larger & comes with two interchangeable suction cups & instructions for use. ...