Is this what Triumph Triples feel like?

Yes, unfortunately that vibe you feel around about 4,000 rpm is where the ignition and fueling is backed off to comply with the dreaded emissions laws put on us by the EU and US, you have a computer or tablet capable of running 'tuneecu'? Then go to tuneecu web site download an instal. Then look for and download you're bikes map and you'll see what's going on for yourself. Many Triumph rider's are putting a map in that someone has had done in a tune shop/dyno equipped workshop

 

I have just come off the same bikes, and onto the same bike!
And I have been having the exact same problem!
I keep going for 6th in 6th, even though it's sitting nicely at 4500 / 5000, it feels better at less than that, right?
Then I started thinking about fuel economy etc, but I feel mine cruises nicely just under 4000, and still has plenty of grunt and poke if you need it!

When sitting at the revs you mentioned, although she keeps plodding along, it almost feels like it's bogging and I find myself blipping the throttle just to check she's still alive and kicking?!

 

Hahaha you are so correct.
I'm around 6ft, and as I've just mentioned in another thread, if I duck just a couple of inches it improves massively!
So I may look into getting some sort of extender if a 'clip on' exists?
I don't think mine is a standard screen, I think it may even be slightly taller. I will have to get a picture of it.

Although yours is the later model, was the screen changed? Mine is a 2002.

 

But yes I still love it! Very nice to have the power but so much more comfort without having to rag my little 400 Jap to the red line. I was too soft and felt sorry for it ha .. She repaid the favour by stopping blood flow to my legs and forcing me to stop every 40 miles!

 

Many people think the 955i is Triumph's best engine. I see Big Dave (thebiglad) hasnt replied as yet,he has a tiger 955i maybe he can put you right too

 

I found putting a 19tooth front sprocket on mine helped, giving better, more comfortable cruising at speed.

 

Original is 18T; & yes, no problem at all. Let's face it, all it costs to try is about £14

 

If as you say vibes are good, another way to reduce/change the vibe is change the bar end weight's. You can add or subtract till you get something you can put up with and enhance the rest of the ride, I added weight to my 94 trident, made it better. Vibes didn't appear as annoying until much higher ROMs.

 

No nothing wrong with the engine, if it sounds smooth and runs fine,it will be tuning or normal vibration of a triple.

 

Hi 955,

Have you tried varying the angle of the foil (the variable top bit)? I find with mine the airflow smoothness is best when the foil is on nearly the lowest setting.

Re the vibes business, as others have said due to engine emission requirement put onto the manufacture there are some anomalies that don't enhance the bike's overall smoothness and performance, allow me to explain.

Engine noise and exhaust emission tests are usually carried out on motorbikes at about 4,000rpm, so the various manufactures devise various ways to make their bike's numbers as low as possible.

Re the bikes fuelling, this often means leaning off of the mixture between about 3800 and 4500 rpm on the STANDARD (factory) fuelling map. In very simple terms the fuel to air ratio is calculated using engine revs, throttle position, air and oil temp, feedback from the O² sensor plus at least 2 tables of numbers.

As the revs rise and you use more of the throttle position, the fulling map moves from table 1 values to table 2 and it is this moving between tables that can give all sorts of undesirable effects such as jerky throttle, roughness at certain rev bands etc.

Most of these negative issues are cured by installing bespoke non-factory maps.

So the big question is, is the vibration you are perceiving worth installing a new map?