There is a 3-hour DVD (aboutENGINES) put out by modelSPORT that does a good job explaining how to dissasemble and reassemble both 2-stroks and 4-strokes. It was worth the $19.99
RCB003 $19.99
aboutENGINES
RCB003 - aboutENGINES
Segments:
1. aboutENGINES
2. Safety
3. Fuel Make-up
4. Fuel Systems
5. Engine Break-in
6. 2-stroke Assembly
7. 2-stroke Break-in
8. 4-stroke Break-in
9. 4-stroke Assembly
10. Adjusting Valves
11. Gasoline Engines
12. Gasser Assembly
13. Multi-cylinder Engines
14. Walbro Carbs
15. Spark Plugs
16. Fine Tuning
Available only on DVD
If my memory is correct, he reseated the valves using toothpast.
http://www.modelsport.com/modules.ph...8a2b7d6df14445