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






...

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




...

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. ...

The Gunson Gastester is a Digital Exhaust CO Analyser with Pulse Pump. Classics first used after August 1, 1975 get their exhausts probed at Mo T time. If the CO reading is above 4.5 per cent, the vehicle will fail the test (3.5 per cent for cars first used between August 1, 1986
- July 31, 1992). Hook up this Gastester at home & you can check & tune your engine accordingly. Accurate to within half a per cent, the Gastester can save you money on petrol, too. Gunson Digital Gastester may be used on motorcycles & other engines including single cylinder engines.
...

A set of 8 good quality Imperial combination spanners, in a beautiful finest top quality oiled leather roll. Manufactured from satin finished Chrome Vanadium, in eight imperial sizes,  1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 11/16", 3/4". Standard length
-  9/16"
- 180mm long. The leather spanner roll has brass eyelets for either tying the roll or hanging on the garage wall.

...

The Xenon Timing Light allows the dynamic ignition timing to be set.

Includes:: inductive pick-up for simple

...

Suitable for use on all petrol engines & easily fits to most vehicles. Accurately measures pressures within the range minus 1 bar (30m Hg) to plus 0.7 bar (10psi). Applications include: Engine Fault Finding, by using the gauge as an inlet manifold vacuum tester the following faults can be diagnosed: spark misfires, poor engine compression, mixture tool weak or too rich, ignition too advanced or too retarded, inlet manifold & carburettor air leaks, incorrect valve timing. Turbo boost gauge; testing boost pressure up to 0.7bar (10psi) & Petrol Pump Tester; tests electrical & mechanical petrol pumps (excluding high pressure pumps used on fuel injection engines)   Suitable for use on all petrol engines Easily fits to most vehicles Accurately measures pressures within the range
- m Ideal for checking a range of applications include Easy to read gauge
...

The Gunson maintenance battery charger is a fully automatic, microprocessor controlled unit delivering a maximum charge rate of 2A. It is suitable for 6 or 12V batteries with capacities between 10AH to 80AH. It is a maintenance battery charger & as such is not suitable for charging severely discharged batteries. It charges in three stages, initially pulse-charging to assist with battery desulphurisation (if necessary), then brings the battery up to 100% capacity. The final stage is a ‘maintenance’ pulse charge (float mode) which will maintain the battery in a fully charged state without overcharging. It features short-circuit protection, overload current protection, & over voltage protection. The unit is provided with quick-connector leads that enable the use of the battery crocodile clips or (for long-term connection & extended use) the eyelet terminals which are connected direct to the main battery lead terminals. It is suitable for regular (sealed or unsealed) Lead Acid batteries & for AGM (absorbed glass mat) batteries used on motorcycles, cars & light commercial vehicles. ...

The Colortune means that you can watch the flame in the combustion chamber as adjustments are made. It takes the guesswork out of engine tuning. How does this work? The flame's colour tells you the richness of the air/fuel ratio. A yellow flame means a rich mixture & a blueish white flame a weaker mixture. Usually a bunsen blue flame is spot on. The Colortune for Motorcycles & other high performance engines is designed to take the higher heat & pressure of a performance engine; this low volume colortune maintains the compression ratio of the engine, ensuring better firing of the mixture. Colortune for motorcycles lets you look into each cylinder when the engine is running. No more flat spots. Other Size of Gunson Motorcycle Colortune Kit is: 12 mm. ...