(14) (7) Rotax BTR M6x25mm screw

Full description: what is the purpose of this piece?

This screw is not a simple hardware screw; It is calibrated for motorsport:

1. Superior Resistance Class: Designed to withstand constant vibrations and engine coolant without lying or loosening.

2. Footprint Six Pans (BTR): Allows precise tightening with an Allen wrench or a hex bush, reducing the risk of "ripping" and damage the screw head during frequent disassemblies.

3. Anti-corrosion treatment: Its surface finish protects against oxidation, gasoline and cleaning products used in karting.

4. Standard Rotax : This dimension is an indispensable standard to have in its toolbox for the current maintenance of engines Junior, Senior, Master and DD2.

? Michel's trick

"The guys, the screw 25, it's a great classic! But be careful: before screwing into the aluminum of your housings, always check that there is no dirt at the bottom of the hole. If you force then there is a debris, you will tear the net. My advice: Always put a small drop of oil or copper grease on the thread. It avoids that the steel does not sodium with the aluminum with the heat. And if the footprint of the head begins to be a little round, throw it away! A screw messed up, it's a Gallery assured to the next disassembly."

? TUTO: mounting and tightening

1. Manual approach: Always start by screwing the first turns in hand to be sure to be well in the thread axis.

2. Tightening to the couple: For an M6 screw in aluminum, the recommended tightening torque is usually 10 nm. Do not tighten "to death", you may deform the seal plan.

3. Clamping order: If you use multiple screws to close a housing, tighten them always progressively and cross.

4. Verification: After the first rolling session following an intervention, pass a key key to check that the vibrations did not create a game.

✅ Compatibility

• Engines Rotax 125 max (the whole range)

• Engines Rotax Dd2

• Multiple Use: CARTERS, BONKS, ACCESSORIES

Note Magickart: Sold individually. Given its price and usefulness, you are advised to always have 4 or 5 help in the toolbox.