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Veteran
Hey guys. I've got this posted over on the 2 stroke side, but I think there's a lot more 4 strokers running the Expert than 2's... Doesn't seem like it's a common problem but just wondering if anybody's had this same issue.
Anyway, the expert is installed in a 2000 SRX 700. The skid rides the bumps great but if I get into tight trails there is a very harsh rubbing/vibrating sound coming from under the tunnel. It sounds very much to me like the outer drive lugs on the inside of the track are rubbing the top idler wheels at the rear cross shaft. It is more persistant on the right side of the sled than the left, but the left will go too if I try hard enough. When riding a tight turn to the right at anywhere between 20-40 mph (and faster) is when this happens on the right side of the sled. If I ride up a snow bank on the right side to lube sliders, the same thing happens.
This problem was terrible a couple weeks ago when I decided to pull the suspension and see what's up... I found a broken bolt at the front cross shaft where the limiter straps are connected and also a broken torsion spring on the right side. I figured this was the problem so I ordered these parts and re-installed the parts and skid and thought i would laughing. Well, this did help considerably, but I can still get the track to rub under there quite easily.
My theories are that either the suspension is flexing when forced to the side, or more obvious, the track is sliding back and forth across the skid frame causing this.
Any Ideas why this would be happening and a possible fix?
Thanks for any help.
Matt.
Anyway, the expert is installed in a 2000 SRX 700. The skid rides the bumps great but if I get into tight trails there is a very harsh rubbing/vibrating sound coming from under the tunnel. It sounds very much to me like the outer drive lugs on the inside of the track are rubbing the top idler wheels at the rear cross shaft. It is more persistant on the right side of the sled than the left, but the left will go too if I try hard enough. When riding a tight turn to the right at anywhere between 20-40 mph (and faster) is when this happens on the right side of the sled. If I ride up a snow bank on the right side to lube sliders, the same thing happens.
This problem was terrible a couple weeks ago when I decided to pull the suspension and see what's up... I found a broken bolt at the front cross shaft where the limiter straps are connected and also a broken torsion spring on the right side. I figured this was the problem so I ordered these parts and re-installed the parts and skid and thought i would laughing. Well, this did help considerably, but I can still get the track to rub under there quite easily.
My theories are that either the suspension is flexing when forced to the side, or more obvious, the track is sliding back and forth across the skid frame causing this.
Any Ideas why this would be happening and a possible fix?
Thanks for any help.
Matt.
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Veteran
I know you guys want to answer this!
Nikolai
TY 4 Stroke God
The Expert-X has sideplay in it, which makes it hard to run a 16" wide track(I had to use flush rivets from the inside out). I would make sure you're not rubbing on rivets in the tunnel. If you are, drill them out and use structual aicraft screws, countersink the holes and put the nuts on the outside of the tunnel. What length Expert? What length track?
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Veteran
The track rubbing rivets makes good sense too. I've looked for signs that it's rubbing some rivets in the side and I can't see anything obvious... but now that I think of it that makes more sense than the idler wheel theory I had. I'm running a 121x15x1 six pitch predator with 144 1.075" gold diggers down the middle. I'll go have another look.
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Veteran
Also I maybe should mention that I have the tunnel support plates (frame doublers) mounted on the inside of the tunnel (took off plate thickness at the cross shaft spacers.
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Veteran
OK you were right Nikolai... I finally got stopped while the track was doing this and parked it leaning on a snowbank. There is a LOT of flex in these suspensions, probably 1/2" worth both ways... I had to use some regular pop rivets to fill a few holes as I ran out of the provided cherry-lock rivets. The POP rivets are slightly longer and you can clearly see where the track is rubbing them. I may just remove these 2-3 rivets and try it. I lost a rear idler wheel today so I need to pull the skid anyway. I'll update on whether this actually fixed the problem or not.
Does anybody have any experience with the Excell Motorsports swingwarm reinforcing kit? What is all included in the kit and how did it help the skid from flexing laterally?
Thanks again.
Does anybody have any experience with the Excell Motorsports swingwarm reinforcing kit? What is all included in the kit and how did it help the skid from flexing laterally?
Thanks again.
change_up
Veteran
Alright I drilled out the regular pop rivets that I had used that were just a bit too long and put in some new multi-grip rivets. The rivet rubbing problem is now gone. However I can see that under higher stress situations the suspension is flexing all the way over allowing the track to rub the tunnel re-inforcement plates and the tunnel. I am going to try machining a cross brace at work tomorrow or tuesday to go half way up the swingarm providing there are no clearance issues... I will tear the skid out again and have a look see.
