103.5dB(A) at 7k RPM

That's a bit better than the previous 117dB(A) at tickover. All I've
got to do know is strip the tailpipes down again & replace the
temporary lockwire with weld, then get the PCIII re-mapped. Making
baffles is such good fun.

--
Krusty.

http://www.muddystuff.co.uk
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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

One assumes that's at the same distance, so very good result. Any idea
what effect if any it will have had on power/good pick up ? Baffles can
be tricky devils when the motor is under load, particularly when given
the beans from low revs.

--

+-----------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Moto Guzzi Mille GT/Squire RS3 Gilera Nordwest |
| Gilera GFR Moto Morini 2C/375 |
+-----------------------------------------------------------------+

 

Yep same distance - 1 metre, vertically level, 45 degrees to the side.
I'm sure it'll drop the peak power a bit but I can't say I've noticed
when riding it. However low down it feels a bit stronger, possibly
because it's now got some back pressure (they were totally open before).

To be honest I'm not really fussed if it loses a few BHP. If it was
that important I would've bought a Jap litre bike & saved £8k in the
process. It'll still make over 140bhp which is plenty for the type of
riding I like (the bendier the better).

--
Krusty.

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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

More of a problem on singles in particular. I fitted a Frigerio
competition can on the big bore Nordie a few years ago. Power was up,
but although carburation appeared spot on, if you gave it a big handful
at low revs it would bog down atrociously. When I bought it he mentioned
something about drilling out three pop-rivets and pulling out the last
little tail pipe baffle. I did this between runs at Gurston Down hill
climb and the bike was utterly transformed. Noise like a Bofors Gun now
though and barely passes a noise test. Fortunately I know how to play
the system a bit at the venue most likely to have me on it (Prescott).


--

+-----------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Moto Guzzi Mille GT/Squire RS3 Gilera Nordwest |
| Gilera GFR Moto Morini 2C/375 |
+-----------------------------------------------------------------+

 

On 24 Jun 2006 19:09:51 GMT, "Krusty" <>
wrote:

snip>

Are they proper horses at the back wheel or la-la land claimed bhp?
140bhp sounds a lot for an MV.

 

It was 129 at the wheel when I had it dyno'd[1], which equates to the
mid 140s at the crank. That was with the factory RG3 full race system
(98dB) which comes as standard with Sennas. Not bad for a 750 really.

The factory claimed figure was 144 IIRC.

[1]Dynotech near Basingstoke, who I believe had a hand in the Team UKRM
bike.

--
Krusty.

http://www.muddystuff.co.uk
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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

I find it quite fascinating the way these things progress, especially
with MV. When the first F4 750 came out in 2000 it was generally
praised for its handling but panned for its lack of power (108-112
rwhp). Then the Senna appeared in 2002 with even better handling & more
power than any other 750 of the time. The GSX-R was always going to be
the benchmark, & they surpassed it within two years of launching the
first MV.

Then they release the 1000 around two years ago, which is again a brand
new engine design from the ground up. Jump forward to a month ago & it
laps Jerez 1.4 seconds faster than anything from Japan at the
Masterbike tests. That's a huge margin in anyone's books, & way beyond
what I would've expected MV could achieve, especially considering their
endless financial troubles.

OK there's still a fairly substantial price difference between MV &
anything else, but even so, it does make you wonder if the Japanese
have really been trying in recent years. Or perhaps it's just that
Tamburini really is that good.


--
Krusty.

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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

Mebbe, but I can't see where they've spent it. It's not like the MV's
dripping with hi-tech lightweight materials, or sitting on factory
Ohlins suspenders or anything. In fact the only major differences to
the Jap bikes are the trellis frame, single-sided swingarm & radial
valve head. All of those have been tried & discarded by the Japs,
except RV heads which Honda still use on XRs.

It may be the MV's natural setup just suits a twisty circuit like
Jerez, & it would get blown into the weeds at Mugello. Or perhaps its
component parts work together just that tiny bit better than anything
elses.

--
Krusty.

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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

That's good for a 750. I've finally had my 10R on a dyno and I think
it was 154bhp at the back wheel once it'd had a different air filter
fitted. I was more interested in where it was producing power rather
than how much so the nice straight line I saw was most pleasing.

**** knows what KHI claim for my bike. It'll be a lot and it'll
include an 'adjustment' to allow for the ram air factor.

I took mine somewhere else where it was cheaper because everything's
stuffed into an old barn.

 

Heh, or the haircuts I'll wager.

--
Krusty.

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'02 MV Senna '03 Tiger (FOYRNB) '96 Tiger '79 Fantic 250

 

Holy fucking shit.

I know Champ's felt fast. Well, very fast, but 150+ bhp is well...

 

I managed to get my Duke down to 96dB(A) at 4k rpm after repacking them.
This was using your suggested 1m, 45 degrees bit to measure. Still sounds
fecking loud at full chat though and has a much deeper tone to it now.
Strange thing is they both had exactly the same amount of packing put in but
now the left hand one gets hotter than the right?

 

It can't be worse than going to the Ramsey shed. Foz reckoned it was
like something out of the original Mad Max and he wasn't far out.

 

I was well pleased with the figures. The best bit was that fitting a
K&N airfilter gave me gains that worked out at less than £8 per bhp. I
wish I could buy another 20 at that price.