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