1. Gather the necessary tools.
- 14mm wrench
- 12mm wrench
- Flat-head screwdriver
- Chain adjustment block
2. Prepare the Raptor 350.
- Park the Raptor 350 on a flat surface.
- Turn off the engine and allow it to cool down.
- Shift the transmission into neutral.
3. Locate the chain adjuster blocks.
- There are two chain adjuster blocks located on the rear swingarm, one on each side.
4. Loosen the locknuts.
- Use the 14mm wrench to loosen the locknuts on both chain adjuster blocks.
5. Adjust the chain tension.
- Use the 12mm wrench to turn the chain adjuster blocks clockwise to tighten the chain.
- The proper chain tension is 10-15 mm (0.39-0.59 inches) of slack.
- Measure the chain tension at the center of the bottom run of the chain.
6. Tighten the locknuts.
- Use the 14mm wrench to tighten the locknuts on both chain adjuster blocks.
- Make sure the locknuts are tight enough to prevent the chain adjuster blocks from moving.
7. Check the chain alignment.
- Use a flat-head screwdriver to check the alignment of the chain with the front and rear sprockets.
- The chain should run straight and true.
8. Test the Raptor 350.
- Start the engine and test the Raptor 350 to ensure that the chain tension is correct.
- Listen for any unusual noises from the chain or transmission.
9. Repeat if necessary.
- If the chain is still not properly tensioned, repeat steps 4-7.
