.5 L
im a 200 plus person and my 380 topped out at 98 and that was pushing it hard. That is all stock parts
no only a ktm 50 engine will work good for a 3 stroke 380
50:1
You have a 1999 KTM 50 SXR.
1.1 L
.7 L
The engine oil capacity for a 2010 KTM 250 XCF-W is 0.75L. It is also stated that the best oil to use for the 2010 KTM 250 XCF-W is the 10W-40 bike oil.
1999
.7 L
That's something you need to check with a qualified KTM shop about.
650cc of 10w30