1000 Cylinder Differences 1998 to 2001 Cylinders?? - ArcticChat.com - Arctic Cat Forum
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post #1 of 19 Old 05-03-2019, 06:15 PM Thread Starter
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1000 Cylinder Differences 1998 to 2001 Cylinders??

Been working on Tcat 1998, Originally
was first one Ive ever taken all apart. I also decided to just take engine completely apart after all the water pump horror stories. I wondered if the Ports from Factory are the same on all the 1000 cylinders? Thanx
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post #2 of 19 Old 05-03-2019, 06:29 PM
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Not sure about that. But... are you going to drill holes in the bottom of the cylinders to lube the shaft bearings?

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post #3 of 19 Old 05-03-2019, 07:00 PM
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Originally Posted by TallCool1 View Post
Not sure about that. But... are you going to drill holes in the bottom of the cylinders to lube the shaft bearings?
Has anyone tried this? Personally I've never heard if this but I'm not certain. I would be a little leary unless I knew if it worked

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post #4 of 19 Old 05-03-2019, 07:33 PM
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No supercession, same cylinders used from 1998 through 2002.

Major differences in 1999- on was the timing mapped into the CDIís. Also the full exhaust sustem (98 was 3 into 3 exiting as 3 individual ports at cans bottom), 1999-on was 3 into 3, exiting as one large dump port at cans bottom)

Roundslides (1998) produce pure raw HP numbers versus flatracks. Flatracks do offer better low and mid range throttle response.
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post #5 of 19 Old 05-03-2019, 09:16 PM
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Has anyone tried this? Personally I've never heard if this but I'm not certain. I would be a little leary unless I knew if it worked
Yes, did it on my '01 when I had it apart. Auggie recommended it to me. Looking at it when apart, it made complete sense.

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post #6 of 19 Old 05-03-2019, 11:35 PM
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Has anyone tried this? Personally I've never heard if this but I'm not certain. I would be a little leary unless I knew if it worked

I have done it on several engines. Yes, once the mod is done and taken apart there is oil in the balance shaft area so bearing life will be extended for sure. I chamfer the crank bearing too to avoid blocking the flow. This would be the outer hole the pen is NOT pointing to in the link. Be sure to tape off everything so debris doesn't get into the bearings. Be sure to chamfer the correct spot on the bearing and not 180* off. lol. Can be done easily. Thanks Auggie for putting me on to this mod.!!



Thundercat Engine Rubuild and Bearings
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post #7 of 19 Old 05-08-2019, 12:00 PM
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Originally Posted by TallCool1 View Post
Not sure about that. But... are you going to drill holes in the bottom of the cylinders to lube the shaft bearings?
I'm lost? TallCool1 asked about drilling holes in the bottom of the cylinders and all I'm seeing is crank and crank case mods. What am I missing?
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post #8 of 19 Old 05-08-2019, 12:47 PM
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Originally Posted by TallCool1 View Post
Not sure about that. But... are you going to drill holes in the bottom of the cylinders to lube the shaft bearings?

All ports will be the same on all 1000 cylinders to answer the question.


Instead of saying drill the bottom of cylinders, Jim meant to say drill holes in the crank case. Can't lube balance shaft bearings from the cylinders. lol.
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post #9 of 19 Old 05-09-2019, 07:38 PM
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Okay thanks lol! That makes more sense, I wasn't sure if the cylinder skirts were shrouding the balance shaft bearings or what
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post #10 of 19 Old 05-12-2019, 11:52 AM Thread Starter
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Thanx!

For all the Replies. I guess every ones drilling holes in they're cases now? I just wondered about the 1998 Tcat 1000 cylinders ,I was before thinking perhaps the cylinder porting was a little better than the Factory Work. Guess its all in the exhaust and cdi that makes the 1998 the stock fastest. It cant be a LOT faster than other years ? Thats stock for stock? I wanted to own one that was bone stock but..looks like that wont be happening. Modified ones are much more Fun to ride. Thanx
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