i took my blade (929) to the shop for a body sync a week ago, it was running perfect and smoothly, so yesterday i took it for a spin and noticed that after the warm up, the rpm dropped so low til the point that i though it was going to shut off by itself,WTF, i just took it to the shop. so i adjusted the idle screw to 1300 rpm and went to work. in the ride to my work i noticed that the rpm was way too high (1500+) so i adjusted one more time to lower the rpm. when i left work same history, whats going on? any ideas?
01 929, pcIII.

 

They might have not connect the vacuum hoses from the throttlebodies properly and if they happen to fall off this 4 outlet T-fitting then you have a vacuum leak and running super lean and will cause this symptom. That is my theory. But it is hard to determine over a forum. But i'd go back to dealership and say..what the hell! Make them fix their mistakes. You shouldn't have to figure this out because of them

 

thank you , i will stop by the shop asap.

 

One thing about that idle switch, especially I've noticed on my 929, is that it is very sensitive and may take several, small adjustments to dial it in.

Just be gentile with it and make small movements, wait for the engine to adjust, rinse and repeat.

EDIT: Make idle adjustments when engine is warm and has been running for a bit.

 

I have never noticed a problem with adjusting idle on my 954. make sure the bike is warmed up first. Also, it sounds like something is not connected right.

 

copy that, what i dont understand is that the bike was running great when it came back from the shop, then a couple days later, it started with this problem. maybe something was loose and came totally disconnected as the days passed by?

 

You have an intake leak.

 

ok so maybe the shop did not tightened the carbs clamps? i havent had time to take it to the shop. it has stopped doing that tho.