13 ounces
using to much oil in the gas
50/1
120mm under the top of the fork
Motorex, SAE 15W-50
The 1999 KTM 250SX typically requires about 1.2 liters (approximately 1.3 quarts) of 2-stroke oil for the fuel/oil mixture. The recommended ratio is usually around 32:1, which means mixing 1 part oil to 32 parts fuel. Always consult the owner's manual for the most accurate specifications and recommendations for your specific bike.
No not on a 2 stroke 250SX, however the 4 stroke 250 SXF does.
On the bottom side of the cases either in the center or at the back (towards the rear wheel side of cases).
The 2003 KTM 250 SX typically requires around 1.2 to 1.4 liters of two-stroke oil for the transmission. It's essential to use a high-quality two-stroke oil specifically designed for motocross bikes. Always check the owner's manual for the most accurate specifications and recommendations for your specific model.
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32:1 is a great gas to oil ratio for any two stroke motocross bike. Also, a Ratio Rite is recommended for accuracy and simplicity.
If your KTM 250SX is blowing transmission oil out of the vent hose, it could be due to overfilling the transmission or a malfunctioning oil seal, which allows pressure to build up inside the transmission. Additionally, a clogged vent hose can prevent proper airflow, leading to excess pressure and oil being forced out. Another possibility is that the gearbox could be experiencing excessive wear or damage, causing increased pressure and oil leakage. Regular maintenance and checks can help identify and resolve these issues.