Join Date: Apr 2011
Location: Brookfield, MA
Thanked 438 Times in 281 Posts
Poor MPG and Throttle Hesitation
Not sure if I have an actual problem as yet or if I'm just dealing with a bad tank of gas from the last fill-up, but I thought I'd throw the symptoms out there for some comments and suggestions from the more tech-savvy here.
On my last long ride last weekend I experienced a noticeable lag in throttle response. Every time I'd roll on the throttle, especially from a stop, I noticed a slight hesitation before power delivery (although it's still there and still noticeable on occasion even in the higher gears). Much different than the snappy response I usually get on my 2011 CBR250R. It almost felt like the engine was cutting out for a nano-second or fueling had flooded for a heartbeat before power returned to normal. I also noticed that I was going through gas at a much faster rate than normal. On the next fill up I added B-12 Chemtool to the tank, thinking it might be all that was required, but it hasn't made any difference at all. I'm still getting the hesitation and still using a LOT more gas than usual.
Think it may be a TPS problem? I have less than 7000 miles on the bike, so a clogged fuel filter seems unlikely, as does a problem with the fuel pump itself. I'm not getting any stalling or failure to start at all, so I'm leaning in the direction of a failing TPS.
What do you guys think? Are there any "known" problems like this that you're aware of, or am I in for a detailed "investigation" to determine what's causing this? A "search" of past threads on the subject hasn't produced anything useful.
Last edited by TrueFaith; 07-15-2017 at 08:50 PM.