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How to Dismantle the Engine of the TM Racing SMR 125?

Model: Tm Racing Smr 125
Part: Engine

Video tutorial

To dismantle the engine of the TM Racing SMR 125, loosen the screws that secure it to its housing at the central lower part of the frame: once the support screws are loosened, disconnect the connectors attached to the engine and free the intake and exhaust manifolds.

At this point, you can unscrew the bolts securing the cylinder to the top of the engine block, detaching it along with the cylinder head: the piston contained within can be released from the connecting rod to access the crankshaft and replace any other necessary components.


Posted on 6 September 2026 by ScegliAuto


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As shown in this tutorial, replacing the headlight bulb on the SYM Bonus 110 scooter is a very simple and quick task. Before proceeding, ensure the key is not inserted for safety. Start by removing both mirrors, then unscrew all the screws securing the front fairing and separate it from the handlebars. Finally, disconnect the power connector, unscrew the bulb holder screws, and remove the bulb from the headlight. Fit the replacement bulb, avoiding direct contact with the glass using bare hands.

Watch the video!


by ScegliAuto

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