jonmep
Just got it firing!
Hi Guzzi Techers, we have just added a 2010 V7 Classic to our family of bikes. This one is my wife's primary ride. Here's a run down of the problem, any ideas or suggestions on what to look for would be greatly appreciated:
On a highway ride, after about 30 minutes, when rolling off the throttle slightly the power seemed to drop off, rather than just reduce proportionately. When rolling on the throttle it seemed to bog for a moment before picking up properly. She pulled up at the next light and the engine stalled, although it started again immediately no problem. The engine then hesitated/lurched initially as she pulled away. A few minutes later it was behaving fine again but it started doing it again on the return trip a couple of hours later. She's continued to ride it for the past couple of weeks and it's done this a few times. She says it's most apparent when trying to sit at a constant speed, just rolling on and off the throttle a little to accommodate corners and terrain undulations. It's quite disconcerting to roll on the throttle as you exit a corner and it momentarily bogs. Giving it a bit more gas will pull it through the hesitation, in fact the bike seems to run better when I'm riding it as I tend to be a little enthusiastic with my right hand. As it's fine under hard acceleration I feel like it's not a fuel pump/filter issue.
We've taken it to a dealer who performed a service and checked for obvious things (to him) like vacuum problems caused by the various pipes under the tank. He put in new plugs and commented that the PO had removed the canister. He suggested looking at the plugs after a few rides to see if it was running a bit rich, suggesting a O2 sensor issue. I did that and the plugs look normal/clean.
I know it's hard to diagnose issues from a forum post but does this sound like something caused by the stock lean ECU map or is this a bit too severe to be that? Anything I could try to eliminate things from our enquiries?
Thanks!
Jon
On a highway ride, after about 30 minutes, when rolling off the throttle slightly the power seemed to drop off, rather than just reduce proportionately. When rolling on the throttle it seemed to bog for a moment before picking up properly. She pulled up at the next light and the engine stalled, although it started again immediately no problem. The engine then hesitated/lurched initially as she pulled away. A few minutes later it was behaving fine again but it started doing it again on the return trip a couple of hours later. She's continued to ride it for the past couple of weeks and it's done this a few times. She says it's most apparent when trying to sit at a constant speed, just rolling on and off the throttle a little to accommodate corners and terrain undulations. It's quite disconcerting to roll on the throttle as you exit a corner and it momentarily bogs. Giving it a bit more gas will pull it through the hesitation, in fact the bike seems to run better when I'm riding it as I tend to be a little enthusiastic with my right hand. As it's fine under hard acceleration I feel like it's not a fuel pump/filter issue.
We've taken it to a dealer who performed a service and checked for obvious things (to him) like vacuum problems caused by the various pipes under the tank. He put in new plugs and commented that the PO had removed the canister. He suggested looking at the plugs after a few rides to see if it was running a bit rich, suggesting a O2 sensor issue. I did that and the plugs look normal/clean.
I know it's hard to diagnose issues from a forum post but does this sound like something caused by the stock lean ECU map or is this a bit too severe to be that? Anything I could try to eliminate things from our enquiries?
Thanks!
Jon
