Hi all. I have read and read and read but wanted to ask/post this one up as I really don't want it lost in all the other stuff relating to rideability problems.
Does anyones 1250S Bandit suffer form these symptoms. Please Note: I haven't converted to MPH etc as it really is reliant on engine RPM rather than road speed. I've only used road speed (Kph) as a guide. It'd be great if a Suzuki tech read this and could comment
This is after it's first service (1000 kms) and a TB sync
Vibrations:
Riding at 60-65 in 3rd gear there is a steady vibration on the pegs and bars. The best way I can describe how to replicate it is start at 60 and sllloooowwwwwly accelerate until you either feel it or get to 70. The taco should read somewhere just a smidj over 3000 rpm (between 3 and 3250 on my bike). My bike does it in any gear above 2nd at these RPM, I use 3rd as it's the 60 kph limit for around town riding.
Surging:
My bike only does it in 4, 5 and 6 gear. It does not happen in the lower 3 gears no matter how hard I try. I think it is something to do with the timing advance/retard function of the ECU.
Using 4th as an example riding at aprox 70 kph the bike will just feel not quite right. Not accelerating sharply then decelerating sharply but as if one cyl is not firing when it should every now and then. My bike does it at any RPM between 2750 and 3500 in any of the 3 top gears. It seams OK above 3500.
I find the best way to replicate this is to cruise up to the speed shifting at about 4000 rpm and not gunning it to get there (so miss daisy driving). The bike needs to cruise so not accelerating or decelerating and not going up hill or down. It has to be a nice flat road.
In 4th and 5th (and probably 6th but I can't hear it at that speed) I can also hear a tinny sound like a relay switching every now and then. My best guess is that the bike is backfiring or fuel is igniting before the valves are shut (which is highly unlikely). I have had a couple of occasions when it has actually back fired with a definite BANG.
I have had the dealer ride it to return with a "I can't feel it" but amplified with "I had trouble keep a steady speed tho" and a "I don't ride these too often so I'm probably not the best person to comment". I also had the chance to ride another 1250S that had 8000 kms on the clock. It's did nothing of the sort when I rode it in fact it was smooth as a baby's bum engine wise.
Now before you ask, my bike has been back to the dealer to have the TB's synced and they were way out. The problem still exists however it has moved slightly down the rev range. It used to happen between 3 and 4k RPM before the sync. The dealer is also contacting the national tech guys to see if there is any pattern of this problem and a possible fix.
Just wanted to post up and ask if anyone has experienced it and found a fix without spending $$$ on tuning boxes, O2 sensor bypass etc, etc, etc. I'm not real keen on spending $$ on a fix that shouldn't be there to start with.
Please discuss.
Topic: More ridability problems while crusing (Read 7685 times)