I use silkolene light gear oil and ipone synthetic 2 stroke at 50:1. It seems to run fine. But it depends on what oil u prefer. I put a flap of rubber along the top of the air box which helped in wet and muddy trials like shown in the picture. Also silicon between the airbox and the exhaust. Check the bolts on ure mud gard are tight because they have a tendency to cume loose. Also clean the carb and air filter frequently. Hope this is of help.
