New Honda St1100 Owner ... Some questions

It's a honda they are don't need fixing on the road. But there is a lot of minor maintanence things that should be done when tires are off. If you did your reasearch the 28 amp alternator were issues replaced with 40 amp after 95. Most Honda dealers don't know much about ST's in general.
Amazing, isn't it. Last time I had a road problem the summer of 1970....on a trip, stopped at the only red light in the little town, right in front of the only service station, a spark plug failed. Sat in the shade and replaced the plugs after the engine cooled.
Ever since, the only attention my onboard tools and spares get is an inspection every year or so.
So, I remain a Honda fan.
 
There is no doubt that the ST is a dependable bike and was probably rarely in a Honda shop very much in the first 10 years of it's life anyways, so how would techs gain experience on this model? And the experienced ones are probably retired and still riding it :biggrin:. Consider the PITA experience of removing tupperware and seized bolts without breaking or damaging something else to get at the main problem on said bike. Honda service advisor speaking to customer-

" Well we found the issue with your bike but that part is no longer available. Would you like us to take another 4 hours to put it back together before we return it to you?"

Don't think either party will be happy with that outcome, so here we are with our 10mm wrenches in hand, spending the day DIY. :hat1:
 
This is from a 25 year ownership of the ST1100. Your bike sounds normal and I would not worry and just ride it. When my bike was brand new it was smooth as silk. Now she has a little noise and vibration but that is expected with age. My body was way better when I was 25 than it is now at 70:(
 
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I just had the 94 out today- I did note a little (very mild) sense of vibration/ buzz in the pegs and bars (I guess I was checking for it today)- nothing out of the ordinary and nothing to make me think there was anything wrong (it’s an engine in a frame, it’s going to buzz). I did almost get hit by some yahoo in a pickup truck rapidly going backwards when I was stopped at a gas station today:mad-2x: but other that that, it was a nice ride
 
While you have the plugs out check compression, one low cylinder will vibrate the engine. Also check valve lift . When I first got my St it vibrated till I balanced the carbs. One reason why Honda chose a 90 degree V4 ,it is mechanically balanced.
Thanks for the info , I have been told about the carb sync and how much diffrence it makes so I will give it a sync up . Its funny , as I have syncrd many a goldwing engines that were way off too but it never really caused any vibration issues , just drivability issues .
I just had the 94 out today- I did note a little (very mild) sense of vibration/ buzz in the pegs and bars (I guess I was checking for it today)- nothing out of the ordinary and nothing to make me think there was anything wrong (it’s an engine in a frame, it’s going to buzz). I did almost get hit by some yahoo in a pickup truck rapidly going backwards when I was stopped at a gas station today:mad-2x: but other that that, it was a nic
Update ... Took it over to my local Honda dealer and had the service manager check it out and he said the bike needs nothing and gave it a clean bill of health , in fact one of the mechanics came with him since the dealer was not busy that day and also felt that the bike was running normally . They consider the vibration normal for this bike and they agreed that the sync of the carbs was unnecessary as the idle was steady at 1100 rpms and no hesitations with stabs at the throttle , and in fact they thought it was running much better than most that they see come in there . Contrary to what I have heard that this was one of the smoothest Honda engines ever made , the mechanic felt that it was not , and that they do exhibit a vibration through the bars , pegs , somewhat higher than other engine designs and that the engine whine was normal with this bike due to the gear driven cams . I took a look and the engine design in the parts diagrams and they use a bizarre tiny cam drive wheel that sits between the cams on each bank that drives them both , have a look if you have some time , its a pretty bizarre . I have seen in cars and bikes where they drive the intake cam off the timing belt and the exhaust cam get driven directly off that but have never seen a idler in between the two cams driving them both , its no wonder the engine whine is so loud . So with that said , I appreciate all the responses and feedback from all of you , it definitely helps so Thank You . I have put some more hours in the saddle of this bike and its growing on me . The corbin seat is way too hard for me and kills the experience , maybe someone of you would like to trade me for a stock seat that you may have laying around lol . That front vent under the windshield is so noisy , not sure what the where thinkin with that , and would like to find a way to cover it or block it if possible and the super high windshield is not my bag and needs to be changed, cut down or something . I sure love the rock solid handling of this bike the most , its dead steady through the corners and tracks straight with ease no matter the speed . The transmission is spot on , shifts very nice IMO , and the brakes are spot on for me anyway , and the flat powerband is different but appreciated for the duty that this bike serves and works well .
 
Wind her up a bit (3,000-5,000 RPMS) and you might find it interesting. ;)
I have no noticeable vibration and/or buzz in any of my 4 ST1100s - that's 1/2 million miles plus of riding between 4 ST1100s.
Vibration (if not a tire thing or a drive shaft issue) is usually too much oil or the carbs need syncing.
With a Flowmeter it takes more time to remove the bodywork than it does to do the sync.
Not accurate to the 12th decimal place, but it works fine for most. :biggrin:
Also, at about 50,000 miles the rear shock turns into a pogo stick.
FWIW, you can replace the two big JIS screws in the side panels with 90112-MT4-000, smooth side cowl bolts.
If you also replace the two hex head bolts in the bottom of the fuel tank shelter with socket heads, you can then strip her down with 1 5mm t-handle.
 
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Where are you at in lllinois? If close I will bring mine by to confirm you have nothing to worry about. About that flat powerband you will love it on the interstate. Mine purrs along fine like a new kitten at 75 to 90 mph:rd11:
 
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