Yeah you need to take the bike to a shop, have the carbs pulled and cleaned then re-sync'd.
Gas stabilizer is NOT good enough to keep the carbs from getting gummed up despite what the makers claim. Even if you run th ebike long enough to get the stabilized gas into the carbs, the small volume of fuel in the bowls evaporates quickly.
And the Ninja carbs are especially sensitive to fuel condition.
Last edited by Mxslick; 03-09-2013 at 02:50 PM.