MXZ 670 vs. ZR 600 EFI
William Hendrickson
I bought a 670 MXZ coming from an Arctic Cat ZR 580 EFI, I figured the
670 should be a lot faster and have better take off than my friends ZR
600's. I installed a 1.45 inch paddle and added a medium windshield, and
I have a hard time keeping up to my friends bone stock ZR 600 EFI.
I knew I wouldn't be blowing by him, but this was a shock. My dealer
said it should "wake up" after 600-800 miles. Has anyone experienced
this, and do they really "wake up"?
Scott Hendrickson
'97 ZR 580 EFI
'98 MXZ 670
Fredrik Schultz
Yeah, Its gonna wake upp. My dealer also told me that the 670 engine is
a little stiff in the beginning. My buddy has the same experiance on his
-97 Lynx 670.
Also make a "SLICK 50" treatment after about 500-600km. It works great.
/Fredrik Schultz Sweden
'98 Formula 670
'98 MXZ 500
'96 Formula 583
'95 Formula SL
SKID...@webtv.net
Last season my 670 was new and I was a little disapointed at first. I
ride with a friend who has a 700 Ultra and he was faster. Another
friend has a 800 ZRT and it would stomp me good.But towards the end of
the season with 1000 miles on the 670 I was faster than the Ultra and
even with the ZRT both on the lake and in the woods. We all run with
studs .I believe it takes a while for the rings to seat and the track to
loosen up.
Good luck!
AL
97MXZ670
TS580
I think you should both" wake up".Its not going to magicly get more power once
its broken in.I rode a 97 MXZ,I thought it was a pooch,even compared to my 93
Mach.Slick 50 is a scam.
Dlchooch
Scott,
You said that you had the 1.45" lug track on your MXZ, right? What track does
your friends ZR 600 have? It takes a little more power to turn that deep lug
track. With that deep lug track you are going to lose a little in the top end
anyways, but I think you made the right choice buying that 670. You just need
to give it a good break in and ride it a little more to appreciate it.
Maybe the weather on that particular day was in favor for the 600 EFI.
Remember Ski-Doo jets their sleds a little different from everyone else.
Don
Michigan
97' MXZ 440
Rich Arms
William Hendrickson wrote:
>
> I bought a 670 MXZ. My dealer
> said it should "wake up" after 600-800 miles. Has anyone experienced
> this, and do they really "wake up"?
>
> Scott Hendrickson
> '97 ZR 580 EFI
> '98 MXZ 670
My brother bought a new MXZ670 last year. His was slow at first but by
mid season it really woke up and was beating a lot of bigger sleds. Even
though I'm not a Skidoo man I was very impressed with his sled.
Rich
98 SRX700
88 INdy 650 (piped & ported)
86 Phazer (piped)
Greg
Rotax motors use a coated ring which doesn't fully seat for 500mi.Your
dealer is being straight with you.Don't forget to be fine tuning the
clutch's.That 670 will have ZR for breakfast,lunch,and dinner.
Greg
Nitro
Hey...I have a 98 zr600 and a 97 mxz670....and you just killed it with
that track....every sled we have around here with a track over 1 inch is
a LOT slower once moving..most loose 5-10 mph and more at all our 1/4 m
runs...we always love to see the guys put those tracks on the big
sleds...grin!!..Nice in powder..but lookout in the hardpack draging
dept once you get over 60 mph...
Another thing with the 670..my last 2 took a GOOD HARD 3-400 miles
before they really went good. wouldnt outrun a 583 till then..why..???
But we have 2 efi 600's in gang and they run right with the 583...which
has been the rocket in its class.....BUT the 670's are a good dozen
lengths out and pulling 10+ mph more in a quarter mile..The 700xc and
the 670 seem to run about the same..and thats outa my 600's range..
GEt the miles on it...then blame some on the track..
Nitro
Kevin Michaluk
My '97 MXZ670 hauled ass from day one. And now with twin pipes, K&Ns, and
a few other mods...it's faster than ever (read....XC700 killer)
Squid
Fredrik Schultz wrote:
>
> William Hendrickson wrote:
> >
> > 670 should be a lot faster and have better take off than my friends ZR
> > 600's. I installed a 1.45 inch paddle and added a medium windshield, and
> > I have a hard time keeping up to my friends bone stock ZR 600 EFI.
> > said it should "wake up" after 600-800 miles. Has anyone experienced
> > this, and do they really "wake up"?
> >
> > Scott Hendrickson
> > '97 ZR 580 EFI
> > '98 MXZ 670
I don't know about the wake up think but I can see it happening... But
one another point the extra height on the track paddles should slow down
your sled... One may not think of this but you DO get more air
resistance when the track is moving through the top part of the
tunnel... Also I notice on my sled compared to a sled with the same
gearing and engine I lost top end because the track was STICKING into
the snow and throwing chunks out the back as where the other sled ran
witha light mist... Also Switching to the medium windshield (from a
smaller one) would cause a slow down in top end but should have little
to no effect out of the hole..
But I could be wrong.. :)
Stolarczyk D P (Daniel)
Kevin Michaluk wrote:
>
> My '97 MXZ670 hauled ass from day one. And now with twin pipes, K&Ns, and
> a few other mods...it's faster than ever (read....XC700 killer)
Here we go again ..... Mod against stock.
Dan
Mountain Doo
Your dealer is right, it will loosen up. One thing to remember, after
your sled loosens up is to keep your clutches clean, and make sure your
sled is jetted properly. Yet another thing to remember is this; despite
what you might hear from some on RSS, properly tuned, your 670 will not
lose to a ZR 600.
William Hendrickson <wjhe...@up.net> wrote in article
<66t9q3$h...@btc3.up.net>...
Gary Zimmermann
factory set at about 17 lbs. After the sled is broken in, it should be
reduced to 14 lbs. Should help acceleration and top speed a bunch.
Gary Zimmermann
Mike Walther
I have the 670 and my brother has the zr600efi we raced a couple of times
and no match for my 670,but don't know how it would be for top speed
Gary Zimmermann <ga...@ibm.net> wrote in article <3496F9...@ibm.net>...
Scott Willis
>Fredrik Schultz wrote:
>>
>> William Hendrickson wrote:
>> >
>> > 670 should be a lot faster and have better take off than my friends ZR
>> > 600's. I installed a 1.45 inch paddle and added a medium windshield, and
>> > I have a hard time keeping up to my friends bone stock ZR 600 EFI.
>> > I knew I wouldn't be blowing by him, but this was a shock. My dealer
>> > said it should "wake up" after 600-800 miles. Has anyone experienced
>> > this, and do they really "wake up"?
>> >
>> > Scott Hendrickson
>> > '97 ZR 580 EFI
>> > '98 MXZ 670
>
Well Scott, I've seen the same thing here in Utah. My
buddy's modified Summit 670 can't hang with my ZR600EFI on the packed
trails in a straight ahead drag. I wouldn' have believed it if I
hadn't seen it myself.
Scott
Scott Willis Utah
2 each '96 ZRT600 Mountain Cats
'98 ZR600EFI Limited Edition
'97 Kitty Cat
http://www.vii.com/~scott
Gary Zimmermann
I would say there is something seriously wrong with that Summit. If he
hasn't yet changed the clutching for low altitudes, he is missing a
bunch of performance. ( I'm assuming the trails you talk about are below
5000') My buddy rides a 700 RMK, which will leave for dead most stock
sleds in a drage race. It is no faster than my stock 670 Summit when we
switch. I'm 6'1", 200lbs, he is 5'7", 155lb. I find it hard to believe
that as quick as the zr is, it will beat a 700 RMK in a straight line
drag race. Maybe I'm wrong, but I doubt it.
Gary Zimmermann
Michael Hart
Gary Zimmermann <ga...@ibm.net> wrote in article <34994E...@ibm.net>...
> > Well Scott, I've seen the same thing here in Utah. My
> > buddy's modified Summit 670 can't hang with my ZR600EFI on the packed
> > trails in a straight ahead drag. I wouldn' have believed it if I
> > hadn't seen it myself.
> >
> > Scott
> >
> > Scott Willis Utah
> > 2 each '96 ZRT600 Mountain Cats
> > '98 ZR600EFI Limited Edition
> > '97 Kitty Cat
> > http://www.vii.com/~scott
> Hi Scott,
> I would say there is something seriously wrong with that Summit. If he
> hasn't yet changed the clutching for low altitudes, he is missing a
> bunch of performance. ( I'm assuming the trails you talk about are below
> 5000') My buddy rides a 700 RMK, which will leave for dead most stock
> sleds in a drage race. It is no faster than my stock 670 Summit when we
> switch. I'm 6'1", 200lbs, he is 5'7", 155lb. I find it hard to believe
> that as quick as the zr is, it will beat a 700 RMK in a straight line
> drag race. Maybe I'm wrong, but I doubt it.
> Gary Zimmermann
>
In case you guys missed this Scott is still running a 121" track...I assume
he was over 5000' being in Utah. Your RMK/Summit example pits two long
tracks.
Michael
Scott Willis
Gary Zimmermann <ga...@ibm.net> wrote:
>Hi Scott,
>I would say there is something seriously wrong with that Summit. If he
>hasn't yet changed the clutching for low altitudes, he is missing a
>bunch of performance. ( I'm assuming the trails you talk about are below
>5000')
Assumed wrong. Above 6000 ft. actually. And his sled will
actually hang with me for the most part off the line, well OK, it's a
dead heat up to about 50 mph, then it's no comparison..... I then walk
away from him like crazy, but that's because of the difference in our
tracks, I did forget to mention that I guess.... so you are right
Gary.
:)
Scott
Robert Roney
Mountain Doo wrote:
>
> Your dealer is right, it will loosen up. One thing to remember, after
> your sled loosens up is to keep your clutches clean, and make sure your
> sled is jetted properly. Yet another thing to remember is this; despite
> what you might hear from some on RSS, properly tuned, your 670 will not
> lose to a ZR 600.
>
> William Hendrickson <wjhe...@up.net> wrote in article
> <66t9q3$h...@btc3.up.net>...
> > 670 should be a lot faster and have better take off than my friends ZR
> > 600's. I installed a 1.45 inch paddle and added a medium windshield, and
>
> > I have a hard time keeping up to my friends bone stock ZR 600 EFI.
> > I knew I wouldn't be blowing by him, but this was a shock. My dealer
> > said it should "wake up" after 600-800 miles. Has anyone experienced
> > this, and do they really "wake up"?
> >
> >
> > Scott Hendrickson
> > '97 ZR 580 EFI
> > '98 MXZ 670
> >
> >
One other thing to check out is to make sure your 670 is not over
reving. If it is you could be losing alot of power........Checkout you
max rpm and adjust your clickers to bring down to where it should
be..Most Doo's are setup a little on the high side from the factory...
good luck,
Bob