Dynojet experiences?

Has anyone had a dynojet kit fitted, and did it make a noticeable
difference?

I ask because after living with the lovely flat spot that came free
with the Micron exhaust for a year, today I took the ZZR to a nice man
with a dyno.

Apart from the fact that the power output was muchly down on spec (I
suppose that'll be transmission loss?) there was a bit of a fuelling
blip around said flat spot, and it was suggested that a dynojet thingy
would sort it out.

I obviously looked at the nice graph printout and nodded sagely whilst
knowing 3/10ths of bugger all, but do the FOAK think it would make a
significant difference?

Oh and is £220 fitted about right, or do I have "raving punter"
written on my forehead?

 

I had a dynojet kit and full face system removed from my 7R and
while I lost a couple of ponies at the top end, I gained a fair
bit through the midrange.

http://www.pre.org/pre/rejet.gif

Depends what you're after, I guess. The top end still suffers from
an inability to get enough gas through the end-can, so that might be
something I get fixed over the winter, pennies permitting.

 

Why pay for a Dynojet kit if you already have the flat spot?

 

They're usually a kit which consists of some bigger jets,
some replacement needles and springs too.

The springs make the throttle action lights and "more responsive"
and the needles do ... erm ... something else.

The main bit you're after is the jets which will chuck more
fuel into the barrels and help get rid of the engineered in
flat-spot which helps it pass noise regulations.

You could mess around with the jets as these are less than
a quid each, but it's the time it takes to pull apart,
setup, put back together and run it up which will take
forever and you really need it on a dyno. This is the
research that you're paying so much for.

Do they make a difference? Yes, but don't expect another
10bhp all through the range as that won't happen unless
you replace the can, fit different air filters and spend
a few hours getting everything *just so* on a dyno.

A kit for the ZZR is a touch over £100, and fitting is
an arse, so for another £100 on that isn't too bad. Will
this include a dyno run after to check it works? If so
it's well worth the money. I'd recommend a replacement
air filter at the same time (while it's in bits) and
I've found Pipercross to be better than K&N - and cheaper
too - these are £35 for the ZZR, again from Demon-Tweeks.

HTH,

 

Ohh. Hmmm. Not confidence inspiring then. Ta.

 

Righto. I don't particularly want more power (the 86 ish BHP is plenty
in excess of my riding skills) just smoother delivery at the bottom /
mid range.

Ah, dunno. But it was only 30 quid so that's not too much of a burden
- if the new magictastic bits work that is.

It does. Ta

 

I sense irony....

 

Macie says...

Ignore the know nothing fuckwits who buy shonky bikes on eBay with
dodgy unknown setups, filters, race systems etc and have to pay
megabucks specialists to put them right. Remember that a Dynojet kit
usually comes with 3 sets of jets, air corrector jets and up to 3 sets
of needles. Getting the right combination is important, and if you
don't get the unused parts when you buy the bike then it can be almost
impossible to get it right if you change something later.

Dynojet kits do work at smoothing out the inbuilt flatspots commonly
found on modern bikes and for upjetting those fitted with aftermarket
exhausts. I had one on my Firestorm and that was noticeably smoother
right through the rev range on stock pipes and pulled cleanly with the
Scorpion race cans as well. On the dyno it produced 116bhp, which was
2bhp up on Trev Franklin's Moriwaki tuned one tested an hour later on
the same dyno. He wasn't a happy man when he saw my dyno chart as his
tuning cost 2500 quid, not that he paid for any of it.

My ZX-9R had one fitted and it worked well enough to make something
like 140bhp with some minor cylinder head work and a race can. When I
took the race can off and fitted the legal Quill can it still
carburated cleanly. Some early dynojet kits had poorly machined needles
which fretted away at the emulsion tubes[1], but Dynojet have addressed
this problem now and they will last as long as standard parts. The
Dynojet kit in my old 9R has been in there for about 15K miles from
what I can make out and still works well.

[1] Darsy's old TRX had this problem after Linger bought it.

 

Macie wrote:

Well the B12 makes 1 less than 130bhp, courtesy of a dynojet kit and
race can. It's sweet all the way through as far as I can tell, and with
a 14 tooth front sproeckt, it's a bit lively. Pip and Molly will both
attest to this.

I'd not be looking to fit one to the ZZR11 though, it's quick enough for
it's bulk, and more importantly, brakes, as it is.



--
Dnc

B1200 - +30bhp ~|~ ZZR1100 - faster when upright
V2300 - flat cap and rug ~|~ VS800 - borked

MIB#26 two#54(soiled) UKRMMA#26 BOTAFOT#153 X-FOT#003

 

*proud*

 

I always liked how alarmingly loud that bike was on start-up...

*BOOM* "****!" BOOMBOOMBOOMBOOM etc

 

Bad form, meant to add, that's actual at the rear wheels vs the quoted
standard of 99.

The can probably accounts for 10 or so of those extra ponies.


--
Dnc

B1200 - +30bhp ~|~ ZZR1100 - faster when upright
V2300 - flat cap and rug ~|~ VS800 - borked

MIB#26 two#54(soiled) UKRMMA#26 BOTAFOT#153 X-FOT#003

 

Bear wrote:

As much as? well, I'm less qualified to know, just going on what I've
been told etc. Still, +30bhp with very little fucking around seems
reasonable.

--
Dnc

B1200 - +30bhp ~|~ ZZR1100 - faster when upright
V2300 - flat cap and rug ~|~ VS800 - borked

MIB#26 two#54(soiled) UKRMMA#26 BOTAFOT#153 X-FOT#003

 

That'll be why it's the size of a shuttle and weight of a planet then.
The standard can I mean.

Don't forget the wheelie wire!


--
Dnc

B1200 - +30bhp ~|~ ZZR1100 - faster when upright
V2300 - flat cap and rug ~|~ VS800 - borked

MIB#26 two#54(soiled) UKRMMA#26 BOTAFOT#153 X-FOT#003

 

Can't stand twats that buy from Bracken and then FAART down the Old Kent
Road. Sorry, but it sounds like a DEEP FART!! Same with BMW Boxer riders.
Purely flatulent.

Neil

 

Lozzo ha escrito:

[mindful stuff]

Had anything done on the Thunderace?

I have been told to do so and adding a complete Akrapovic exhaust line,
but that would mean losing the Exup valve which gives the mid-range
confort.

 

Oi! I'm no more flatulent than the next man...
--
| Wik -UKRMHRC#10- 2003 R1150GSA -DC#1 -'FOT#0 'FOF #39 - BOD#12 BOB#12
|# You don't believe me | "Experience is the worst teacher.
|That the scenery | It always gives the test first
|Could be a cold-blooded killer. | and the instruction afterward."
***** human response from wik at blueyonder dot co dot uk *****

 

Gwan then, name names... Dynos and dyno operators vary just as much as
the "advice" spewed forth in this forum <g>

I've seen some /really/ dodgy results 'cause of this...

[snip]

If it includes a half dozen runs including before and after then, yes...
--
| Wik -UKRMHRC#10- 2003 R1150GSA -DC#1 -'FOT#0 'FOF #39 - BOD#12 BOB#12
|# You don't believe me | "Experience is the worst teacher.
|That the scenery | It always gives the test first
|Could be a cold-blooded killer. | and the instruction afterward."
***** human response from wik at blueyonder dot co dot uk *****

 

Rhencullen at Hinckley.

 

On the way from ALDI to LIDL. How convenient!