2004 T660 Upgrades - ArcticChat.com - Arctic Cat Forum

4 Strokes Z1 Turbo / Z1 / T660

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Old 12-20-2016, 10:42 PM   #1
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2004 T660 Upgrades

Just putting out a feeler here; I bought the pictured sled for a song as it didn't run but I eventually found out that it was simply that the battery was wired wrong. The secondary clutch was also bad so I ended up buying two "new" ones. The one I currently have installed is off of a 97 ZRT. It's got a yellow spring and a single cut 55 helix. Actually runs pretty well with that. I also found(cheap) a new Bearcat clutch which has a blue spring and 45 ramp. A gentleman told me that it too will work reasonably well.

The engine is in pristine condition with 10k miles. The PO always had it in for service at the local AC dealer throughout it's life and it's always been stored indoors. Plugs looked perfect when I pulled them as well.

Now; to the question at hand. I don't know much about tuning the four strokes. It's the first one I've owned and I really do like it. The PO had just had the dealer install a new muffler so it's hard to hear around a corner from 10' away.

Can these particular machines be "tuned" much? What's a good "bang for the buck" modification?

Any and all ideas appreciated.

This forum has been a great help...cheers to you and yours over the holiday season!
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1994 EXT580/EFI
1973 Panther

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Old 12-20-2016, 11:03 PM   #2
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I'm not sure what you can do for mods engine wise. For my T660 T/T I added a temperature guage and ice scratchers. I used it 9 seasons before I decided to do this after one spring where snow conditions were poor on the lakes where we fish. The short track T660's were prone to over-heating. The other thing I did was I added a 4th wheel on rear axle. Inner wheel bearing broke apart and wore down axle and spacer by the time I got back to my truck. And yes they are so quiet.
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Old 12-21-2016, 11:19 AM   #3
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You're talking a non-turbo T660 right?

Other then adding some stuff to make your life easier like 660catman said (scratchers & temp gauge) there's not much you can do to get more performance out of a non-turbo.

It's a 55ish HP sled...

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Old 12-21-2016, 07:48 PM   #4
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ya thats pretty much a 50mph machine, ride it on the trails and be happy, want speed get something else
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Old 12-21-2016, 07:52 PM   #5
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 Quote: Originally Posted by kopeck View Post
You're talking a non-turbo T660 right?

Other then adding some stuff to make your life easier like 660catman said (scratchers & temp gauge) there's not much you can do to get more performance out of a non-turbo.

It's a 55ish HP sled...

K
Yeah...kinda what I thought. No real big deal as bought it more to use as a true "touring" machine with the wife/kids/grandson. The temp gauge is a good idea. I rebuild heads for old British cars and I always tell customers that the quickest killer of those heads is an overheat. If you can catch it before the gasket blows, the head warps/cracks and/or you burn a valve...you'll save yourself a LOT of money and time.

Yes it is a non turbo. Where's the best place to install the sender/gauge? Anyone have pics of their install to share?

Thanks again.
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Sleds
2004 T660
1994 EXT580/EFI
1973 Panther

Past Sleds
1999 ZR600/EFI
1996 ZRT600
1994 Cougar
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Old 12-21-2016, 07:56 PM   #6
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 Quote: Originally Posted by guudasitgets View Post
ya thats pretty much a 50mph machine, ride it on the trails and be happy, want speed get something else
Oh it'll go much faster than 50...I did 60 in my back "yard" the other day!lol! My old 440 Panther will do that without much difficulty as well.

The EXT 580 (EFI) I picked up is a fast machine as well. Pretty close to the ZR600's(EFI) I owned.
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Sleds
2004 T660
1994 EXT580/EFI
1973 Panther

Past Sleds
1999 ZR600/EFI
1996 ZRT600
1994 Cougar
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Old 12-21-2016, 07:57 PM   #7
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 Quote: Originally Posted by Oshkosh1 View Post
Where's the best place to install the sender/gauge? Anyone have pics of their install to share?
Here a link to my radiator job, theres a few things in there you can do, temp sensor goes in a boss on the Thermostat housing before the thermostat

T660 Turbo Radiator Installation
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Last edited by guudasitgets; 12-21-2016 at 08:02 PM.
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Old 12-21-2016, 08:00 PM   #8
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T660 Temperature Guage Add
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RTR Steerlites & Shock Bushings
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Old 12-21-2016, 08:08 PM   #9
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 Quote: Originally Posted by Oshkosh1 View Post
Oh it'll go much faster than 50...I did 60 in my back "yard" the other day!lol! My old 440 Panther will do that without much difficulty as well.

The EXT 580 (EFI) I picked up is a fast machine as well. Pretty close to the ZR600's(EFI) I owned.
Ok I have a 98 ZR600, and I had a brand new in the crate, zero miles, 2007 T660 Turbo. As in your sled with a turbo and about double your horsepower and it was about even with my 600 on top end, slower to accelerate , I hate to break the news to you but your non-turbo 660 is not anywhere close to a 600
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Old 12-21-2016, 09:58 PM   #10
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 Quote: Originally Posted by Oshkosh1 View Post
Oh it'll go much faster than 50...I did 60 in my back "yard" the other day!lol! My old 440 Panther will do that without much difficulty as well.

The EXT 580 (EFI) I picked up is a fast machine as well. Pretty close to the ZR600's(EFI) I owned.
Yeah, it will do 60 on good snow, maybe even a tad more. It will take a while to get there but it can do it.

Your touring model wont have the same overheating issues that the Turbo Trails do. My father has an '05 Touring just like yours and my wife has a '02 trail. My machine will overheat and theirs will run just fine. Heck my father has pulled a grooming drag behind his from time to time. That being said the gauge is nice so you know what's coming. Throw a set of scratchers on there just for piece of mind and go riding.

While I love the pull of the turbo I've taken my wife's machine on rides from time to time and had a great time. Speed isn't everything, at least for me. We're not that far removed from 440s being the motor of choice for most riders.

What year is your EXT? I had an '96 EXT DLX. Great little machine. In fact that's the machine I had before the T660.

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