1999 cbr900rr weird idle
So I recently bought a 1999 fireblade and I have noticed a small issue with the bike's idle.
After riding the bike for a while and it gets up in temperature(80-85+ c) the bike will have a lumpy idle and will drop from 1200 rpm to less than 1k rpm intermittently, as if wanting to stall.
It also affects when I take off in first, sometimes it will stall. My first thought was this was a result of me not putting the petcock to "off" when I would park it for the day/week.
After letting the bike run with the petcock "off", burning some of the fuel, I tested again and it still had the same problem.
I think it may be the spark plugs as I'm not sure when they were changed last.
Any ideas? Thanks guys. Bike has 25k miles, was running on 87(I filled up with 91 just now, to see if any difference, no noticeable difference).
Last edited by fayablade; 02-14-2015 at 3:39 AM.