Below FAQ are some common concerns of our customers, if you have other questions, please just send it to support@microbikes.co.uk

1. Is the fuel mixture done correctly? (usually 25to1, please follow the instructions) Too much oil in the mixture will make it harder to burn.

2. Is the spark plug dirty? Clean or replace it if its dirty Make sure the carburetor and the intake manifold are tightly secured to the engine. Check the gasket between the carb and intake manifold. Sometimes the gasket is bad and causes leak.

Solution: replace new gasket or just toss the bad gasket away and screw carb back. now try to start again.

You should pull the pull start cord out a little until you feel the tension then give a good pull, pull smoothly. Pulling with a jerking motion can damage the internal part of the pull start breaking the cord.

1. The chain might be loose and need to be tightened. First, loosen the axle outer nuts and then tighten the axle adjusters on each side. After the chain is tightened, go ahead and tighten the axle nuts.

2. The wheel and motor sprockets are not properly aligned. check to see if the chain is straight from the rear wheel sprocket and the motor sprocket. It not, then follow the above procedure to get the chain lines up correctly.

3. Sometimes, if the bearing(s) goes bad in the rear wheel, the wheel will tilt at a strange angle causing the chain to come off easily. This can bend the axle as well.

1. Adjust the screw with the spring on the side of the carb clockwise to reduce gas flow and counterclockwise to allow more gas flow. Usually bogged down is caused by too much gas going thru the carb. Give it time to warm up. If that doesn't solve the problem, you need a new carb.

2. Your gas mixture is too rich and you need to reduce the amount of oil a little. check the gasket between the carb and intake manifold. it might be bad or maybe the carb came loose due to engine vibration.

1. The chain might be loose and need to be tightened. First loosen the axle outer nuts and then tighten the axle adjusters on each side. After the chain is tightened, go ahead and tighten the axle nuts.

2. The wheel and motor sprockets are not properly aligned. check to see if the chain is straight from the rear wheel sprocket and the motor sprocket. It not, then follow the above procedure to get the chain lines up correctly.

3. Sometimes if the bearing(s) goes bad in the rear wheel, the wheel will tilt at a strange angle causing the chain to come off easily. This can bend the axle as well.

Spares can be ordered from the website or via support@microbikes.co.uk if not available on the website.

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