I've been trying to diagnose why my 1993 K75RT will die or hesitate to accelerate RPM's when starting from a stop if it's not above 2k RPM's. I start the bike, let it warm up with full choke, then with full choke or half choke or no choke it will die unless I keep the RPM's over 2,000 and let the clutch out slowly and I mean slllowwwwlllyyyyyy. There is a noticeable hesitation of when the RPM's increase when I quickly roll on the throttle when I slowly roll the throttle the hesitation is not as noticeable.
After about 10 minutes of stop and go traffic it still requires the RPM's to be over 2,000 or it luggs. If I downshift from 3rd to 2nd and go around a sharp corner the RPM's drop to idle (1100) and then when I give it throttle it luggs like I'm in 5th gear going 20mph (even though I'm in 2nd gear).
I'm looking for some advice and suggested items to check first.
When I start it from cold with full choke it idles at 1300
then half choke 1100
and no choke 1000-1100
What I've done so far:I've replaced the Z-shpaed breather hose on the top of the crankcase. Because it was cracked.
I checked for cracks around the intake boots by spraying carb cleaner around them to see if the RPM's changed, they didn't.
I don't hear a "click" from the TPS at any position, but I'm going to check this with an ohms meter.
I'm pulling the fairings off and the tank to check for any more air leaks.
Next I'll be pulling the gas tank to get to the air filter. Do I really have to pull the gas tank to get to the air filter?
What I haven't checked yet:Spark Plugs, but it doesn't have any problem starting or running except at launching from a dead stop.
Air Cleaner
Fuel pump, injectors, throttle bottle, fuel filter - although it seems to run fine other than the launch issue
What I found to be weird:This hose which looks like it's broken and I have no idea what it's supposed to connect to. I checked for vacuum when the bike was running but nothing. It connects to the front of the motor. it is on the right side in front of the air box.
I tried adjusting the TPS by loosening this screw (and the otherside screw) and moved the TPS to the top and bottom and inbetween to try to find the "click".
Here's my crankcase breather hose. The crack was on the end that connects to the airbox.