Does Alumium bars reduce vibration over standard steel bars?

[Zapf]

Does Aluminum bars (e.g Pro Taper) reduce vibrations over the standard steel handle bars?

Because the CB900 motor gives off this vibe around 4~5000rpm and it is exactly in the range for motorway speeds. And it is driving me nuts on long rides...

Welcome any suggestions on reducing it ? thanks

[Brian d marge]

yes they do due to the material , but another way is to increase /decrease the mass of the component ( the bar snake does this ) - lead shot is cheaper !-
Check though the engine mounts are tight, and the holes are not worn ( or any of the rubber engine mount bushes )

As you may be able to tighten the bolt, but in actual fact the engine will be flopping all over the place, ( Jerry crunchers missus was always afloppin ...)

Finally you could fit those foam rubber handle bar grips that every American import bike seems to have on , the ones that fall apart in the rain after 2 km or so ( horrible things!)

Stephen

[Bob]

Another thought - go and get the bike on a Dyno and get an expert to sort out the tuning.

4-5k tends to be where the power "flat-spot" lives - it is there for a cunning reason. 4-5k is about where the emissions monitoring is done. So... you build a dip/flat-spot in at that point, the engine passes muster... and then the power comes back in again. Trouble is, this tends to make for a vibey spot at what is, for most of us, about where we'll spend a chunk of time in the rev range.

By having your bike Dynojetted, they can iron out the flat spot and most likely the vibes with it.

Click here for information on Dynojet and further links to Dynojet centres etc (http://www.dynojet.com/about_us/testimonials.php)

This is a link to Dynojet centres in NZ (http://www.dynojet.com/maps/bikedynos/newzealand.htm)

[myvice]

Try some bar weights.
Cheaper than new bars, but a dino is the proper way to go.

[Lou Girardin]

Try gel grips, heavier bar-end weights, check engine mounts, synch the carbs, then when all the cheaper stuff hasn't worked try alloy bars or even different gearing.
I don't know if the vibes are due to the flat spot, because all inline fours have a high freq vibe around mid range. It's inherent in the design.

[NhuanH]

Try gel grips, heavier bar-end weights, check engine mounts, synch the carbs, then when all the cheaper stuff hasn't worked try alloy bars or even different gearing.
I don't know if the vibes are due to the flat spot, because all inline fours have a high freq vibe around mid range. It's inherent in the design.
Fuck all that. Just a wrap a size 13 Mrs Tapili (Sione's mum) chandal round the bars.

And then, when you feel the need to complain about another modern motorcycle, you can just slap yourself round the head with one (or both). Bonus!

[sugilite]

In my experience, aluminum transfers even more vibes than mild steel does.

[NhuanH]

Does Aluminum bars (e.g Pro Taper) reduce vibrations over the standard steel handle bars?

Because the CB900 motor gives off this vibe around 4~5000rpm and it is exactly in the range for motorway speeds. And it is driving me nuts on long rides...

Welcome any suggestions on reducing it ? thanks
On a serious note, why not chop down a gear? If you wanted to just amble along in a straight line in comfort on the mway, why not just cage it?

Bikes don't like being nana-ed.

[slob]

Yeah I noticed that tingly vibration on my mate's Hornet 919 too - seems to be characteristic of the model (the Bandit 1200 also has it). Funny how you don't notice it on IL4 sportbikes though? :scratch:

Anyway, I imagine that you'd get used to it after some months. Also, I'd say try using heavier bar-end weights.

[pritch]

Yeah I noticed that tingly vibration on my mate's Hornet 919 too -

Funny! I haven't got that. There is a brief vibration period lower down but I experience that only very occasionally.

Without wishing to incriminate myself, I have spent a lotta time between 4 and 5000 RPM and there are no vibes there to speak of.

The bike may need looking at.

[cowpoos]

ahhh......throw the handle bars away if they piss you off....

makes some new ones out of sand/clay and blue gum wood....they're the best....and hold them together with dryed weetbix and week old custard!!!

[Lou Girardin]

Fuck all that. Just a wrap a size 13 Mrs Tapili (Sione's mum) chandal round the bars.

And then, when you feel the need to complain about another modern motorcycle, you can just slap yourself round the head with one (or both). Bonus!

That would make it a chandelear then.:laugh: