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Arctic Cat: M Series 2005-Current, all models in the M-series chassis
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  #1  
Old 09-04-2011, 06:46 PM
AkHockey10 AkHockey10 is offline
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Default '10 M8 reverse grinding noise?

Whoa....haven't been on here in a while! Anyway...

Have a grinding noise only in reverse when getting on throttle. Took DD a part and that's not it. Next thought would be something wrong with primary? Secondary had been checked out back in Feb but may as well look at it also. Anyone have an idea??

Also, sled also slams HARD into gear going forward and in reverse. Sitting at idle I slowly give it throttle and it revs up and nothing happens then bam it goes into gear. It will jolt forward and backward and will throw you off the sled if not read for it. Crazy!

Last edited by AkHockey10; 09-12-2011 at 09:24 PM.
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  #2  
Old 09-04-2011, 07:04 PM
ACMtnCat ACMtnCat is offline
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your grinding noise is likely the drive shaft bearing it the brake caliper. Take the caliper off, youll have to get both bearings out to check them. The inside one is held in by a C clip. Tap the first one out then youll see the C clip that needs to be removed.

The harsh engagement is likely two things. The belt to sheave gap is one. The other is a combination of weights being too tight and not swinging free enough and the spindle bushings hanging up or worn out. A good primary clutch cleaning and making sure the weights are just right and swing easy will help a lot! But you may need to adjust belt to sheave gap to cure the slam your feeling.
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Old 09-04-2011, 08:10 PM
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Primary could be the cause of both problems. Depends on what you consider a grinding noise. You can also get vibes in reverse from the end of the hyfax.

Last edited by diggerdown; 09-04-2011 at 08:17 PM.
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Old 09-04-2011, 09:53 PM
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Was told the secondary converted back to torsion spring setups can cause a grinding like noise/feel in reverse. Causes the belt to slip and hop in reverse?? My sheaves are full of belt marks. The 09 M8 I just bought is doing it. Really has a hard time getting moving in reverse. Anybody confirm or refute this? Mine is the OVS secondary kit.
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Old 09-04-2011, 09:59 PM
ACMtnCat ACMtnCat is offline
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Quote:
Originally Posted by bushy View Post
Was told the secondary converted back to torsion spring setups can cause a grinding like noise/feel in reverse. Causes the belt to slip and hop in reverse?? My sheaves are full of belt marks. The 09 M8 I just bought is doing it. Really has a hard time getting moving in reverse. Anybody confirm or refute this? Mine is the OVS secondary kit.
Just open your hood and watch what the belt does when you're in reverse and start to move. Whats happening?
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Old 09-04-2011, 10:25 PM
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That would be too easy..I'm more of a "pull the crank out and have it straightened only to find it was a loose helix all along" kind of mechanic. lol I actually did that last year...

First sled with reverse and I'm guessing it will work better reversing on snow, but the trailer has plastic ski guides so it should have that much trouble backing out? I'll let you know what I find out next time I pull it out of the trailer.
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Old 09-05-2011, 08:39 AM
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Seems like tons of threads on here about torsional kits not working well with reverse. Do you have a bud you could swap secondarys with that is still running compression setup?
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Old 09-05-2011, 09:18 AM
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Default AkHockey10

After reading your post, it sounds like you may have the torsional conversion spring setup in the driven clutch. As mentioned above, a lot of people including my self had issues with them working in reverse properly. If belt deflection is off then the helix can grind and sheaves open up and that caused the sudden jerk or grab when the belt slams in taking up the slack in the belt.
Once the sheaves are open then when you try and engage the clutch forward you have the lurch forward again. Look at your helix where the rollers ride on it in the reverse side area of roller contact. I bet you see the problem.
Hope this may help you out.RickM
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Old 09-12-2011, 09:23 PM
AkHockey10 AkHockey10 is offline
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Nice. Thanks guys!!

I FINALLY had the chance to look into the sled. Diamond drive is in healthy condition. Took off the primary and didn't see anything out of the ordinary Its gotta be something! Giving it a good wash down (same with DD) and putting it back on. My next thing is maybe I should change my spring... It will help with the rough engagement making it smooth...in theory. Will look into the other possibilities.
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Old 09-12-2011, 10:27 PM
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Old 09-13-2011, 01:13 AM
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Old 09-13-2011, 01:17 AM
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Old 09-13-2011, 07:49 AM
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Old 03-12-2018, 09:35 AM
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Old 03-16-2018, 07:39 AM
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Old 04-01-2018, 11:35 PM
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