I Luv My FZ6: Issues |
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Unstable Engine Idling-Cause Intermittent TPS (Throttle Position Sensor) Internal Contact:Symptom: On some units in the affected range, engine idling speed can become intermittently unstable after the engine reaches operating temperature. Idle speed can drop to 500~600 rpm and the engine can stall if left idling. This is a widespread and acknowledged problem for 2004 and 2005 YZF-R1's and FZ6's, at least in USA, as reported here
Yamaha Motor Corporation, USA, Motorcycle Technical Bulletin M2006-011, This issue is a niggling problem I had with my FZ6. History: After I'd done about 6000km, I started to notice that as my bike reached a consistent operating temperature (after ~ 30kms riding) that it would stumbles (or misfire) This was particularly noticeable when riding for sometime at a constant rev range/ speed and in any gear. This is just the sort of riding that occurs in traffic, in wet conditions and when trying to ride smoothly when there's a passenger aboard. Initially this was accompanied by erratic and higher than usual idling. Most recently the misfires heralded the start of much lower than usual idling- the reported 650 - 800RPM and when I clutched in the bike would actually stall. A very simple diagnostic of this electrical fault is to kill the ignition, turn the key off then on again, restart the bike and the bike should idle and run exactly as it should. This has been a quick and temporary fix but unfotunately has increasingly shorter effect before its required again. Yamaha Motor Corporation, USA committed to replace the TPS's on all the US R1's and FZ6's within a specified range of units. Yamaha Motor Australia agreed to follow suit and swap out my TPS, on August 8th 2006, under the existing warranty. It's safe to say that I am very pleased with the difference the new TPS has made and am very greatful to Yamaha Australia for being good sports about the dodgy TPS component! Underseat exhaust issue for Ventura Aerodynamic Bike-Pack SystemBackground:I purchased the Ventura Aerodynamic Bike-Pack (Aerospada IV) System for my 2004 Yamaha FZ6-NS in 2004. The Yamaha FZ6-NS has the exhaust routed directly under the seat, exiting above the rear fender. I was pulled over on a ride to be told that my tail-light was being obscured by the Ventura pack (see Img #1 and #2). Upon investigation it was revealed that when the Aerospada pack was in the rear position the part extending past the rack sagged to obscure view of the tail-light from the rear. It is assumed that the heat from the underseat exhausts softens the stiffening material in the base of the pack allowing it to sag. Its annoying to have to work at overcoming an issue created by a design flaw for the application of a new Ventura Aerodynamic Bike-Pack System on a bike with an underseat exhaust system. However I managed to come up with a suitable solution by constructing a shelf for the rack The shelf was made from 7mm ply and cut to approximate the shape of the bottom of the pack (see Img #4). The shelf has two slots for the mounting straps to pass through and provision to tie the shelf down to the rear of the rack. Img #5 and #6 show the improvement of visibility of the tail-light with the shelf installed. It should be noted that the pack in these photographs was less than 20% full and that the bike had not been ridden for more than 48 hours. An unplanned outcome of this design is that the shelf slips neatly inside the pack when not required and is useful as an upright stiffener!
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