DennisA

This is my 5th VFR (3rd 5th gen) and the throttle response is erratic. It bogs down at 4,000 rpm sometimes but the surging is the biggest problem. Previous bikes were linear in power with predictable boost around 7,500 rpm and fully powered up at 9,000. My new 2001 sat for a couple of years before I purchased it. I've changed plugs, gas, oil and air filters, switched to synthetic oil, flushed the cooling system with little improvement. About 8,000 miles, mostly highway with 4 tanks having Techron additive in the past month. Not sure if o2 sensor eliminator would help before I tackle the throttle bodies and injectors. I checked the stator at 12.75 on the bench then approx. 14.5 with the bike fast idling. Running out of summer...….

My 2001 5th gen problems are being addressed by starting with throttle bodies complete with fuel rails and injectors. There are multiple units available from a 98 or 99. The part number is slightly different. Can anyone tell me if it will fit or what the difference is? Thanks, Dennis

Thanks guys for the assistance, I'll let you know how I make out. Fuel Injector cleaning to start.

I'm on my 5th VFR, the 3rd 5th gen and never had a problem until now. I purchased a low mileage 2001 with 22,000 KM, that had been sitting for a couple of years. A new battery, gas filter, air filter, synthetic oil and filter, spark plugs and new tires. The city driving operation is ok but highway riding with varying rpm suffers from bogging down occasionally but constant surges. It feels similar to 6th gen VFR. The surges may occur at 5,000, 6,000 or 7,000 rpm. I've tried Seafoam and Lucas engine cleaners. We exchanged the throttle body sensor. Should we have exchanged the entire throttle body? No error codes, idles fine. Valves not done yet.. Any suggestions would be appreciated, thanks, Dennis