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Old 06-21-2010, 01:04 PM   #1
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Default Are the bearings toast or is it something else?

All four wheels on my Losi 8ightB 2.0 have excessive slop. With the wheels on the car you can wobble them quite a bit. If you take the wheels off, its a little more difficult to notice the slop/wobble, but its certainly there. I have the aluminum spindles, carriers and rear uprights on this buggy and the entire buggy has about 3 gallons on it.

I'm just not sure I can pinpoint what is causing the slop. I took the front spindles and carriers off and slid the cvd through the bearings in the spindles. It doesn't feel like there is any slop in the bearings. Put the entire assembly back together and its just sloppy. If I were to guess at this point, I'd say it feels like the aluminum upgrades have slop at the mounting pins and bolts. I never noticed it when I first installed the parts, but maybe there were like that from the beginning?

Does 3 gallons sound about right for cvd/wheel bearings to wear out? Do the aluminum spindles, carriers and uprights just have more slop than plastic, or did the aluminum parts cause the mounting pins and bolts to wear out quicker?

I have a whole new set of cvd/wheel bearings on order, but if that doesn't eliminate the slop I'm at a loss.

Thanks in advance for any insight!
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Old 06-21-2010, 01:06 PM   #2
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Come on Matt, It's a losi. It's supposed to be that way. Anyway, I should be at McCullough's this weekend, so I can take a look at it for you if you like. If anything I bet you just need a new set of bearings. I change mine every couple gallons or when they get gritty.
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Old 06-21-2010, 01:13 PM   #3
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Come on Matt, It's a losi. It's supposed to be that way. Anyway, I should be at McCullough's this weekend, so I can take a look at it for you if you like. If anything I bet you just need a new set of bearings. I change mine every couple gallons or when they get gritty.
I know Koby, that's why I think the Losi is going to become an e-scale at the end of this season, and there will be a new Mugen MBX6 in the stable for the start of next year's outdoor Nitro
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Old 06-21-2010, 01:18 PM   #4
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It is probably the aluminum wheel hexes. Since it has only 1 pin holding it in place, when the axle and hex wear together, the hex rocks back and forth on the pin. You can drill and tap a 2 mm hole for a set screw on 2 of the flat spots on the hex and this will take out alot of the slop.
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Old 06-21-2010, 01:38 PM   #5
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Originally Posted by Wease View Post
I know Koby, that's why I think the Losi is going to become an e-scale at the end of this season, and there will be a new Mugen MBX6 in the stable for the start of next year's outdoor Nitro
Trust me, you don't want it to be tight. Try tightening the losi up and see how it drives. I guarantee you will be putting it back to how it was. Anyway, a lot of the slop in them comes from the wheel hexes. The pin holes wear out, and create a bit of wobble. If you really feel the need to get rid of that, just replace the hubs and pins. 3 gallons on the bearings is quite a bit. It may be time for a new set. At $1 a piece, it is worth it to change them often.
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Old 06-21-2010, 03:26 PM   #6
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Usually it's the rod ends and the bearings then the hex and pin later.
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Old 06-21-2010, 03:28 PM   #7
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Pull it apart and check it.
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Old 06-21-2010, 06:55 PM   #8
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Most of the wear or play that I am used to seeing in my Losi cars ended up being in the rod ends,steering rod ends,and carrier pivot points at the arms...I usually check the bearings after about every other race.Or if they are rough or gritty like someone else said.
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Old 06-21-2010, 07:04 PM   #9
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Most of the wear or play that I am used to seeing in my Losi cars ended up being in the rod ends,steering rod ends,and carrier pivot points at the arms...I usually check the bearings after about every other race.Or if they are rough or gritty like someone else said.
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Old 06-21-2010, 07:28 PM   #10
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From my experiences most cars drive better when they get a little slop/play in them.
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Old 06-21-2010, 10:04 PM   #11
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You think your buggy is sloppy? Go check on a truggy and you will think your ship is tight! I check bearings after every weekend. I pray to god I don't have to replace them but I still like to know the status. My RC cars are maintained better than my car! Is that scary or what?
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Old 06-21-2010, 11:06 PM   #12
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My RC cars are maintained better than my car! Is that scary or what?
same here
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Old 06-22-2010, 07:34 AM   #13
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Check the rod ends to make sure it's not there then I ended up trying the x-Ray hexes. They bolt right up and so far they are much tighter than the losi stuff. That is the easiest fix and there's no modding required. You just gotta spend a couple $$
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Old 06-22-2010, 08:21 AM   #14
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Quote:
Originally Posted by Frank L View Post
Check the rod ends to make sure it's not there then I ended up trying the x-Ray hexes. They bolt right up and so far they are much tighter than the losi stuff. That is the easiest fix and there's no modding required. You just gotta spend a couple $$
That's a good start... now you just need to upgrade the rest of the parts to XRAY stuff!
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Old 06-22-2010, 11:29 AM   #15
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The aluminum wheel hexes have some play in them from the factory, and it gets worse as time goes on. As one other person mentioned, drill and tap the hex and install some set screws to keep the hub from wobbling side/side. I've used shim stock ( .001-.002 thickness ) wrapped around the cvd, then slide the hub over that.
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