![]() Zone of fouling with non-evaporated fuel - this is the zone of the highest degree of fouling for spark plugs. Zone of fouling with dry combustion deposits The range of thermal values for BRISK spark plugs extend from the warmest to the coldest, namely 19, 18, 17, 15, 14, 12, 10 and 08. In order to achieve the correct temperature of the insulator tip for a given engine, the spark plugs are produced in various thermal values. High temperature results in pre-ignitions of the air-fuel mixture and further compression of the mixture already ignited leads to high temperature, which can cause serious damage to the engine. Too high temperature of the insulator tip is undesirable. The spark plug operates in an optimum manner. In this temperature range, no new deposits are formed and those existing will be burnt. Providing a higher temperature of the insulator tip, no further combustion deposits are formed, but those already existing will not be burnt until the insulator tip temperature rises above 500 ☌ - the so-called self-cleaning zone. A consequence of these combustion deposits on the insulator tip is reduction in electrical insulation resistance accompanied by failing ignitions and after a certain period of time even by a failure of the spark plug performance. If the insulator tip temperature drops into the so-called deposit zone, combustion deposits (carbon, non-combusted fuel, lubrication oil, impurities from the atmosphere) start to form on the insulator tip surface. Insulator tip temperature influence on the proper choice of spark plug heat range In order to ensure sufficient insulation between center and ground electrodes it is necessary, during operation, to keep the insulator tip (the part of the insulator projecting into the engine area) within an optimum temperature range. Two basic conditions for proper performance of a spark plug are given by sufficient electrical insulation between the center and ground electrodes and heat transfer from the parts of the spark plug projected into the combustion chamber. Adapt to specific engine characteristics and widely varying driving/load conditions.Run hot enough to burn off combustion deposits that would otherwise collect on the insulator tip and cause fouling that results in misfire.Stay cool enough to avoid pre-ignition and/or electrode destruction due to detonation.It must do this in precise and controlled manner so the spark plug will: BRISK wishes good luck to team and riders for all of the 2023 season.Heat range is the measure of how fast the spark plug tip dissipates combustion heat. To work directly with a factory team gave us opportunity to keep improving and be again part of the top motorcycle sport. Hana Kajnarova (BRISK Commercial Director): “Our continuing partnership with GASGAS Factory Racing for 2023 season is satisfaction for exciting technical solutions and knowledge, which BRISK team reflects into their racing spark plugs, with great respect to racing engines and responsibility to the GASGAS Factory Racing team and all its riders. Knowing that we can rely on those quality products that BRISK produce is an advantage for all of our riders and teams." Now, the focus is on taking another step forward when the new season begins. ![]() Robert Jonas (Head of Motorsports, Off-Road): "2022 was a successful year for the GASGAS Factory Racing teams and it was amazing to share the success with BRISK. GASGAS Factory Racing teams in both disciplines are excited to build on that success, as well as the progress that has already been made with BRISK. The GASGAS athletes reaped the benefits of those spark plugs in recent months Andrea Verona sprinted to the EnduroGP and Enduro 1 titles aboard his EC 250F and Jorge Prado clinched the bronze medal in the MXGP standings. It was back in 1935 that BRISK started their journey, so they have more than 85 years of knowledge to pass onto the GASGAS Factory Racing squads. GASGAS and BRISK reflect on a successful start to their partnership.GASGAS Factory Racing continue to rely on the spark plugs.GASGAS Factory Racing extend BRISK relationship for 2023.Continuing an exciting relationship that started one year ago, GASGAS Factory Racing will further their work with BRISK spark plugs to ensure that the teams in the FIM Motocross World Championship and FIM Enduro competitions will be able to rely on the strongest spark plugs available. ![]()
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