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Old 09-05-2008, 12:50 PM   #1
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Default rc12l4 stub axle question

I feel completely silly asking this, but I have never assembled a 1/12 scale before and have never come across this in 20+ years of rc...why are the front axles on my L4 a quarter inch too long? My first reaction was "dummy you installed the kingpins in the front axle holes" but that's not the case, so now I'm assuming it is for changing the front track width but there are no shims or spacers in the kit and no mention is made of it in the manual. I'm using Jaco premounts with the kit bearings if it matters. Also, is there a threaded-axle option for the L4, associated or aftermarket? Thanks in advance!

-rocky b
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Old 09-05-2008, 01:18 PM   #2
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The step in the manual where you mount the front wheels should show installing a 4187 spacer on the axle before mounting the wheel. These are white plastic 1/8" washers. That will take up some of the slack. The remainder is probably built in for differences in wheels. If there is still a lot of space, you may be able to add a spacer on the outside of the wheel also as long as is doesn't cause the wheel to bind up.
There are a few aftermarket axles with threaded ends and nuts to replace the stock e-clip axles. Parma/PSE, CRC and Lundsford are those that I can think of right now. Bolink used to make them also, and I think you can still find them from whoever has taken over the manufacture of the Legends oval cars.
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Old 09-05-2008, 01:35 PM   #3
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You are right the kit does show the 4187 spacers and I did install them but they are nowhere near thick enough to take up the extra axle length. I have enough axle left over to put a third bearing inside the wheel

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Old 09-05-2008, 01:39 PM   #4
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the kit bearings for a 12l4 were non-flanged bearing. these are for the "old" style jaco wheels. the new wheel use flanged bearings. the lip of the bearings sit on the outside of the wheels on both sides. that should take up the rest of the slack.
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Old 09-05-2008, 01:40 PM   #5
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Quote:
Originally Posted by flatspunout View Post
You are right the kit does show the 4187 spacers and I did install them but they are nowhere near thick enough to take up the extra axle length. I have enough axle left over to put a third bearing inside the wheel


Different wheels have different offsets so you have to just add enough shims to where the wheel spins free but is'nt sloppy on the axle.
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Old 09-05-2008, 01:46 PM   #6
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Quote:
Originally Posted by theisgroup View Post
the kit bearings for a 12l4 were non-flanged bearing. these are for the "old" style jaco wheels. the new wheel use flanged bearings. the lip of the bearings sit on the outside of the wheels on both sides. that should take up the rest of the slack.
Makes perfect sense thanks!

Hey Chris thought you might get a kick out of this
http://www.rcracingxtreme.com/Points/2008Points.htm

Guess who's FK04 that is sittin on top?

-rocky b
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Old 09-05-2008, 02:01 PM   #7
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Thats great Rocky, how many $400+ cars did you beat with her.
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Old 09-05-2008, 02:01 PM   #8
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Ahh, yes, the flanged/unflanged bearings. Been there, done that... should have thought of that.
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Old 09-05-2008, 02:27 PM   #9
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Threaded stub axles are inexpensive. My L4 has Lunsfords, which are fine, as are CRC's. Both are widely available. They don't even really count as an "upgrade." More like an update.
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Old 09-05-2008, 07:03 PM   #10
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I raided my old Lazer Lite 1/10 car and its parts box and came up with flanged bearings AND threaded axles that work like a charm. Thanks for the help! Oh and Chris, I'm still running brushed motors/NiMH against brushless and lipos...that FK04 is a BEAST in stock sedan!

-rocky b
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