Learning how to properly tune a small engine on a go kart is an important step in maintaining your kart. These engines, while small, can be tuned to quite a high level of performance if done correctly and with some planning. Most engines are of four main varieties, so let’s take a look at them first.

The four types of engines start with the most prized, which is one of double-bearing specifications, and with a bore made of aluminum and a crankshaft featuring a roller bearing on either side. It’s a little rare, though, and maybe not worth the hassle. This is because an engine with a steel bore and a twin- bearing set-up is just about as popular and useful, and it wins many races, too.

The remaining pair consists of single-bearing engines, with either an aluminum or a steel bore. All four motors, really, can be extremely competitive in racing, as long as each is built up and then tuned properly. And when tuning and maintaining a go kart engine, remember that regular oil changes help the most. After that comes inspecting and tuning up the sole spark plug. Remove and check it over regularly. Look for accumulated carbon on the electrode, in addition to any scoring on the electrode surface.

It’s important to make sure the plug is gapped to required spacing between the electrode and the plug firing tip. Take a gapping tool and run it through to make sure the spacing is between.025 and.030. If it isn’t, re-gap it and then reinsert it back into the engine. And don’t forget to check the plug’s wire for signs of cuts or any excessive wear. This can degrade engine performance significantly, if present.

The engine’s air filter will require an examination and a light cleaning with an air hose, most times. If it’s too clogged or dirty, just throw it away and put a new one in. After that, check over the carburetor fuel-air mix, making sure the needle valve is tightening all the way down and then turned back out 2.5 turns. This should serve to give the carb the proper gas and air mix. Once that’s completed, timing can be checked with a timing light and a ‘how to’ guide.

Tuning racing go kart engines yourself should be an activity that any serious go kart enthusiast takes the time to learn. Keeping a properly maintained and race-tuned engine up and running will help contribute to the enjoyment many people derive from racing these little motors. Perform regular maintenance and tuning schedules, though, to ensure top performance.