Helpful 4T Resources (Manuals, Troubleshooting, & More)

[90GTVert]

Manuals : Service and repair manuals as well as other documents for many types of scoots. Manuals will tell you things like torque specs, ignition system test procedures, assembly/disassembly, and troubleshooting.

Bearings, Seals, And Torque Info

Wiring Diagrams

Tech Library : Full of info and tutorials covering a broad range of topics.

No-Start Troubleshooting : A guide to diagnosing no-start conditions with lots of pics.

Scooter Glossary : Make sense of the scooter related terminology that our forum members use.

Maintenace Schedule : Not sure how often you should check or replace something? Look here.

Engine And Gear Oil Change Video

Valve Adjustment : (Video)
Valve Adjustment : (Text/Pics)

Trial And Error Tuning Method :  (Video) Works for carb, CVT, and other types of tuning.

Need Main Jets For A 139QMB? : Parts For Scooters part # 114-49 for a kit. Part # 114-36 for individual jets.

Calculators : Compression ratio, ring end gaps, speed, and other calculators that may be useful or fun to play with.