Mini Valve Adjusting Tutorial:
A couple of pictures for those LIKE200i owners still kicking around the idea of doing their own valve adjusting. Add these pictures to your knowledge base....and give some thought to performing this service on your scooter. Watch a couple videos on youtube, and the one from our member here...to get your confidence up.
Video by forum member:
6000 miles and time for valve lash check.....(and installed a new NGK Iridium plug while everything was open)
Removed seat and seat/bucket in one piece.....(4 10mm bolts, 2 screws)
Battery cover & center cover come off (5 screws) Cover the battery area with heavy cloth.
Spark plug is there if you want to change it. Recommend you remove & replace the plug in one quick step - so you remember the angle the plug goes in at. Start threads with fingers!...then the tool.
Remove small black hose with your finger nails. Slowly remove the four 10mm bolts in X rotation to avoid warping cover.
Remember where the bolts were positioned....
Remove cap and look in port to view the TDC "T" and the notch in case....and position the chain sprocket 3 holes as seen in video.(there are several for GY6 engines on youtube)
Rotate engine forward to align TDC (check TDC by grabbing the end of valve arm and finding movement - if no movement - you have NOT found TDC. How much movement? >> .oo4 inches, tiny but can be felt!)
"feeler guage" blade (.oo4 inches) finding proper gap under rocker arm end. Take the blade out of the pack for easier handling. Move nothing, and check the bottom (exhaust) valve gap with the same .004in. blade.
After checking and/or adjusting the valve lash gap...add a few drops of oil to the parts before putting cap back on. I use this thicker Honda gear oil so it stays in place while I'm buttoning things back up.
Re-attach the breather hose to valve cover. Replace the center cover, then the battery cover. Replace the seat/seat-bucket. You've adjusted your valves!
Stig