Discover 125 valve clearance

The most common setting for those engines is 0.14mm for Both valves.

Hi!

You need to adjust your valve lash clearances to:
Intake: 0.015" (0.381mm)
Exhaust: 0.015-0.020" (0.4-0.5mm) (Try smallest setting first. If still not running right, change clearance to 0.020".)

We have made a video to show you how to adjust the Valve Lash Clearances if your not sure how:
Setting Valve Lash Clearances on a Portable Gas Generator - https://www.generatorguru.com/help-me-fix-my-generator-repair-advice/

If you need to purchase parts they are available on our website.
www.GeneratorGuru.com

Regards
The Generator Guru Team

Excessive valve lash clearances start to show themselves in more difficult starting usually. If yours is starting and running like a champ then may not be necessary, but you do need to be aware of the symptom so you can do the maintenance when you do notice. I hope this is helpful for you.

Hi bbg713,
I hope I can help you out. The valve lash (tappet clearance) on engines of approx this size should be 0.005-0.007 inches (0.13-0.18 mm) for intake valve and 0.007-0.009 inch 0.18-0.23 mm for exhaust valve (cold engine). Adjust tappet clearance by grinding end of valve stem to increase clearance or grind valve seat deeper to decrease clearance. I hope I have helped you a bit. Any more questions are welcome. Regards and good luck. Denis.

Valve Lash ADJUSTMENT 1.6L Engines NOTE: Measure valve clearance with the engine cold.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove the valve cover.
3. Set the engine to Top Dead Center (TDC) of the compression stroke for the cylinder to be adjusted.
4. Check the valve clearance. The valve clearance specifications are as follows:
   • Intake valves: 0.005-0.007 inches (0.13-0.17mm)
   • Exhaust valves: 0.005-0.007 inches (0.13-0.17mm)
5. After adjustment, tighten the locknuts to 11-14 ft. lbs. (15-19 Nm).
6. Repeat for each valve to be adjusted.

1.8L, 2.0L and 2.5L Engines The 1.8L, 2.0L and 2.5L engines utilize automatic hydraulic lash adjusters to maintain proper valve lash at all times. Periodic valve lash inspection and adjustment is not necessary or possible.

timing chain should be auto adjust. set valve clearence to inlet 4 thou, exhaust 6 thou

tiburon uses hydrolic lash adjusters there are no valve lash adjusting If you hearing a pecking sound on the top of the mtr try some oil additive or replace the hydrolic lash adjusters

valve lash on the intake .003 to .005 inch, .08 to .12 mm,exhaust .004"to.0055 inch,.10 to .14 mm (cold engine).