It sounds like it could be fuel starvation. You need to be careful, as you are running the risk of seizing, although with the oil injection you will have a bit of a safety net.

Check the float level is set correctly. I can't remember what it is off-hand, but I think there's a few on here with the info or access to English specs via Australian manuals. (It's probably similar to the NSR125 carb.)
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

Check us out on Facebook! Please "like" our page!