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post #1 of 78 (permalink) Old 01-09-2013, 10:38 PM Thread Starter
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98 ultra help

ok so i am picking up a 98 ultra sxp 700 triple the guy thats selling it to me is my boss and said that when he got it it had 1 scored jug so he got a new piston and jug for it . the sleds been sitting for a year engine has been in his house and never put back together so i am getting it for 300 bucks new skis and all what do u think what was the power like out of it and is there anything i should know about the 700s before i get it or put it back together also. my indy 500 efi bogs when u first get on it then after a couple sec it picks up and hits hard any ideas on that

94 polaris Indy 500 EFI SKS Snow King Special l/c and 95 polaris Indy Trail 500 f/c ooo yea love polaris BRAAAAPP
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post #2 of 78 (permalink) Old 01-09-2013, 10:40 PM Thread Starter
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ultra spx

94 polaris Indy 500 EFI SKS Snow King Special l/c and 95 polaris Indy Trail 500 f/c ooo yea love polaris BRAAAAPP
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post #3 of 78 (permalink) Old 01-10-2013, 09:23 PM Thread Starter
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no input guys

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post #4 of 78 (permalink) Old 01-11-2013, 06:25 AM
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Well all I can say is, take some pics of it ,& the 680 Ultra SPX was the more perfomance sled of the Ultra's .With the triple pipes from factory it will deleiver a 135 hp.You will fall in love with the sound of that triple.I garentee it !I may be able to give you some advise what to do & look out for.
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post #5 of 78 (permalink) Old 01-11-2013, 04:01 PM Thread Starter
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ok i have some pics i just picked up the sled and here they are
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post #6 of 78 (permalink) Old 01-11-2013, 04:02 PM Thread Starter
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post #7 of 78 (permalink) Old 01-11-2013, 04:09 PM Thread Starter
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So do u guys think the piston will be good to go or should I just order a new one for the sled

94 polaris Indy 500 EFI SKS Snow King Special l/c and 95 polaris Indy Trail 500 f/c ooo yea love polaris BRAAAAPP
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post #8 of 78 (permalink) Old 01-11-2013, 05:04 PM
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I love the look of that sled. I still miss my Ultra Touring I sold last year.

You may want to look into why the cylinder got scored and fix it so it doesn't happen again.

The engine is pretty reliable even with the tripple pipes. Sucks a lot of gas. It has a slight gear whine comming out of the gear driven water pump which is normal. Awesome tripple sound.

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post #9 of 78 (permalink) Old 01-11-2013, 06:41 PM Thread Starter
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ok well i know that the head gasket when on it and thats y the cylinder went on it i got a gasket kit for all of them so i think i will tear it all down and redo them all what do u think of the piston tho i was told it would be find to run the sides are good along the rings so i think i will run it but what are your thoughts on that

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post #10 of 78 (permalink) Old 01-11-2013, 06:46 PM Thread Starter
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there we go
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post #11 of 78 (permalink) Old 01-11-2013, 07:32 PM
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I can't recommend you re-use the piston. Why don't you put the new one in?

Only two seasons up here, Construction and Winter!

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www.ontarioconditions.com Ontario Conditions and more!

www.tata-bestsnowmobiling.com Timiskaming Abitibi Trail Association - Golden Corridor Snow Drifters

www.ofsc.on.ca Ontario Federation of Snowmobile Clubs

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post #12 of 78 (permalink) Old 01-11-2013, 09:11 PM Thread Starter
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i am i was told that it would be ok to run it if i wanted to but i think i will get a piston for it and a new small end bearing for it as well what would u recommend i found a parts unlimited piston u think that would be ok to run

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post #13 of 78 (permalink) Old 01-12-2013, 01:04 PM Thread Starter
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Ok so I am looking at pistons and the ones I have found are 66.50 mm or 66.60 mm pistons now both say oem size I called the dealer they said the cylinder bore was 66.60 mm so what should I get for pistons I am so lost now

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post #14 of 78 (permalink) Old 01-12-2013, 04:57 PM
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Only true way to find out what the cylinder bore is. You will have to measure it using a Micrometer.
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post #15 of 78 (permalink) Old 01-12-2013, 08:08 PM Thread Starter
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well i found out that original piston size it is 66.50mm the bore size is 66.60mm

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post #16 of 78 (permalink) Old 01-12-2013, 10:40 PM Thread Starter
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does anyone have pic of this engine put back in the sled i am looking for some ref on in along with were is the water pump also we can i get a stud for the block just any stud or should i get one from the dealer it looks like a exhaust stud but its the one from the block to the jug anyways pics would help a lot thanks guys

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post #17 of 78 (permalink) Old 01-13-2013, 08:31 AM
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It might help a little to look here for parts diagrams: Browse

Only two seasons up here, Construction and Winter!

Gallery Pictures.

www.ontarioconditions.com Ontario Conditions and more!

www.tata-bestsnowmobiling.com Timiskaming Abitibi Trail Association - Golden Corridor Snow Drifters

www.ofsc.on.ca Ontario Federation of Snowmobile Clubs

Current Sleds: A few
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post #18 of 78 (permalink) Old 01-13-2013, 09:06 AM
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The first thing I would get is a manual for this machine! That piston is garbage ,look at this thing, it's half tore apart! The water pump is located in front between the mag & center cylinder ,under the exhaust ports.

Don't get to antsy about riding this machine for a while,she's going to be a projet ! You need to get the parts all aranged where they go,clean & inspect! You need to read up on this machine , you have Nicisil cylinders in that motor which can not be bord out they only can be replated.The water pump is a major issue with these motors,they have to be inspected once & a while.

Why don't you start reading my tread (Ultra 680 Compression) build & you will get a heads up on what it looks like & some things to look out for pics start on page 5.
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post #19 of 78 (permalink) Old 01-13-2013, 09:16 AM
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The first thing I would get is a manual for this machine! That piston is garbage ,look at this thing, it's half tore apart! The water pump is located in front between the mag & center cylinder ,under the exhaust ports.

Don't get to antsy about riding this machine for a while,she's going to be a projet ! You need to get the parts all aranged where they go,clean & inspect! You need to read up on this machine , you have Nicisil cylinders in that motor which can not be bord out they only can be replated.The water pump is a major issue with these motors,they have to be inspected once & a while.

Why don't you start reading my tread (Ultra 680 Compression) build & you will get a heads up on what it looks like & some things to look out for pics start on page 5.
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post #20 of 78 (permalink) Old 01-13-2013, 09:37 AM
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Quote:
Originally Posted by Mighty Quinn View Post
...The water pump is a major issue with these motors,they have to be inspected once & a while...
The 1997 and 1998 Ultra water pump is different than the 1996 water pump. 1996 was the bad year as it was lubricated with an oil reservoir system. Once seals leaked, the impeller bearings/bushings would go dry and wear fast. '97 and '98 pumps are lubricated by fuel/oil wash just like the crank bearings. My '97 never had a problem.

Only two seasons up here, Construction and Winter!

Gallery Pictures.

www.ontarioconditions.com Ontario Conditions and more!

www.tata-bestsnowmobiling.com Timiskaming Abitibi Trail Association - Golden Corridor Snow Drifters

www.ofsc.on.ca Ontario Federation of Snowmobile Clubs

Current Sleds: A few
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