07 650 stalls from idle

Hi,

thanks to this forum I now have a new 07 FE 650, which I received in a crate. During the past weekends I've been slowly assembling it together. So far only one issue, when I yank the throttle open from idle, the engine stalls 1 out 5 times, it just stops.

The jetting is the "unthrottled", with the parts that came with the bike:

Jetting: MJ 160, PJ 40, Needle OBEKR (2nd position) and PS at the moment 2.0 open
Engine won't stall with a closed PS, but revs will drop 200 rpms (measured by tiny-tach).

I'm also a bit puzzled with the manuals, as the 2005-2007 repair manual states PJ 45 and needle position 4, but the 2006-2007 owners manual PJ 40 and needle position 2 for the EKR.

I'm burning to finally drive the beast on a trail, but not in this condition. Prior buying I tested a new fs550 and it had exactly the same behaviour.

Any hints what to try out first?

BR, Nikke

Real life

Ok, I guess I need to clarify. I meant that I refuse to take the bike onto a trail, until it stops stalling from iddle - not that I haven't driven it. The bike stalls randomly when opening throttle, be it in motion or on the paddock. Period.

I've read most of the jetting threads including the doc carburation part, but there isn't much written on the standard EKR set-up.

The 650 has plenty of power for me to handle, so I'm not in the quest for an ultimate power curve jetting, just a reliable response. I expected the standard setting to have decent driveablity out of the box and if not, then a short tip from someone who has faced the same problem.

BR, Nikke

wildman said:

Unless your at 5000ft above sea level you shouldn't have to change too much apart from the pilot setting & possibly the ap.

Click to expand...

= Thank you wildman, I'll continue running it some more.

I've scratch built a small aeroplane including the engine to operate it (carburetor, turbo) and it now works up until 14000 feet. Doesn't do the Himalajas, but OK to cross the Alps.

If an engine doesn't work on a stand as I expect it to, then I don't "just blast away like an idiot and hope for it to cure itself" unless I know better.

Short visit, but I'm out. I'll try to find a technical discussion somewhere else.