Removing Tach & speedo covers - They, the covers, don't come off. You can perform a can-opener type operation on them which is mentioned here somewhere, but they are not meant to be disassembled.
Replacing Brake levers - Just loosen the clutch/brake cable, align the adjusting nuts (at lever) and remove the cable. Note where the pivot of the lever is and remove that bolt. As for what else fits...I dunno.
Replacing handle grips - Left grip: Open the control box where the choke elver and directional signal switch are located. It comes apart clamshell style and has a locating pin on the underside of the handlebars. Slide the assembly away from the grip. Using a plain blower attatchment on a compressed air line peel up the flanged end of the grip and insert the tip of the blowgun. Grab the grip throttle style and rock it back and forth as you blow air under the grip. This will create an air bearing (like a hovercraft) and it will zip right off. To reinstall, if using the same style rubber grip, just slide it on while covering the hole in the end of the grip to use the same air bearing effect.
Right Grip: Open the control clamshell as above. Loosen both throttle cables and remove at the control end. This may require some working of the throttle to get them in position to remove. Once the cables are loose and the clamshell fully open the grip will just fall off.
Replacing Brake levers - Just loosen the clutch/brake cable, align the adjusting nuts (at lever) and remove the cable. Note where the pivot of the lever is and remove that bolt. As for what else fits...I dunno.
Replacing handle grips - Left grip: Open the control box where the choke elver and directional signal switch are located. It comes apart clamshell style and has a locating pin on the underside of the handlebars. Slide the assembly away from the grip. Using a plain blower attatchment on a compressed air line peel up the flanged end of the grip and insert the tip of the blowgun. Grab the grip throttle style and rock it back and forth as you blow air under the grip. This will create an air bearing (like a hovercraft) and it will zip right off. To reinstall, if using the same style rubber grip, just slide it on while covering the hole in the end of the grip to use the same air bearing effect.
Right Grip: Open the control clamshell as above. Loosen both throttle cables and remove at the control end. This may require some working of the throttle to get them in position to remove. Once the cables are loose and the clamshell fully open the grip will just fall off.