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Old 01-13-2013, 08:37 PM   #1 (permalink)
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1998 Summit questions

Hi there, Im new to sleds. I have a 1998 Ski-Doo summit 670 rotex. 5000km on it. Easy trail km's and thats all it will be doing as long as I own it. It has good compression and runs quite well. One issue that im having is when I give it fuel from a stand still, the clutch/belt seems and feels like it is chattering until I get moving at a good speed. What is this about?

I would like to take my clutch apart and clean/oil it and replace the belt but I don't even know how to do that. any tips would be really appriecitated

Im running Arctic Cat semi synthetic oil in it. If that ain't right, please let me know.

Thanks guys,
Kevin
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Old 01-13-2013, 09:16 PM   #2 (permalink)
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Remove your belt and inspect it closely...anything obvious?Clean both cutches with a clean rag and brake cleaner....glass cleaner works also.Use a green scotchbrite pad to scuff up sheaves on both clutches,clean again.Clean both sides of belt with glass cleaner ONLY...let dry.If that doesnt fix it,time 4 clutch rebuild.Good luck! Also check clutch alignment.
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Old 01-13-2013, 10:35 PM   #3 (permalink)
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Not sure what you mean by both clutches, sorry. Complete newbie here. Not sure how to check alignment on them either.
I will be replacing the belt just for good measure...once I figure out how to do it
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Old 01-14-2013, 06:24 AM   #4 (permalink)
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Is it a ratcheting sound? Your chain may be slipping in the chaincase too. You cah tighten the chain with the adjuster located on the side of the chaincase.Finger tight then back it off 1/4 turn. Go to the how-to's section of this forum. There are a lot of tutorials there. Clutches are one of them!
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Old 01-14-2013, 07:34 PM   #5 (permalink)
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Yes, a ratchet kinda sound describes is well. And now that you mention it, im betting that it is the chain!! Thanks, I will have a look and see if I can figure out how to adjust it. Will check out the "how to" section also.
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Old 01-15-2013, 06:19 AM   #6 (permalink)
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There is a bolt coming out of the chaincase that you tighten to adjust it.
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Old 01-15-2013, 01:19 PM   #7 (permalink)
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Could also be a loose track... some people loosen them for storage through the summer. I do that myself. If you have a loose track and really get on it, it will ratchet on the drivers. That's how I know when I've forgotten to tighten mine back up...
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Old 01-15-2013, 04:43 PM   #8 (permalink)
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I had a few minutes today to play with it. As I don not have a new belt yet, I worked on the chaincase and track tension. I pulled the case cover and drained the old oil, adjusted the chain tension to finger tight then backed it off a hair. And put new oil in the case.

Tightend up the track a bit. Didn't need much. The lugs look good on it and it doesn't appear to big skipping at the sprokets. And the noise that I am hearing is only when I lightly get on the throttle and accelerate slowly, as I always do. If I get on it hard, I don't hear or feel anything.

End result, still getting a chatter. But at least I have that area out of the way and I know its all good so no need to worry about it on the trail.
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Old 01-16-2013, 06:10 AM   #9 (permalink)
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Nice job on the maintenance. The belt may have been the problem.
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Old 01-16-2013, 09:30 AM   #10 (permalink)
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Hey Kevin, sounds like you need a manual or 2. This is a great place to get direction but it helps to have the books. Go to skidoo.com in the owners section and down load your operators manual. Very basic info to get you going. PM your email to me and I'll shoot you the 98 books. Good luck.

PS You have 2 clutches. Primary is the front one. And secondary is the other one the belt goes around. You may wish to open the hood and remove the belt guard and slowly accelerate while observing the clutch and belt. The primary should collapse smoothly and there should be no chatter in the belt.
Be cautious around the clutch when the engine is running. I can hurt you. Cheers.
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Old 01-16-2013, 04:21 PM   #11 (permalink)
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Thanks a bunch David, will do!!
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Old 01-19-2013, 11:21 AM   #12 (permalink)
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I put a new belt on it and that did the trick!!!

Thanks for all your input guys!!
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Old 01-19-2013, 02:20 PM   #13 (permalink)
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Congrats
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