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Old 09-02-2019
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Shaundesigner Shaundesigner is offline
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Default Pinion and spur gear advice

Nejust bought my first Yokomo Yz2 CA
My RC knowledge is very limited, the spur gear and pinion doesnít look very well matched, Iím currently running a 10.5 motor, the pinion is a 48p 19T, to me the sour gear looks a bit used.

Or am I wrong and just need to mesh it better, I havenít ran it yet, nor spent any time meshing it as I thought it may need replacing.


Last edited by Shaundesigner; 09-02-2019 at 02:03 PM.
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Old 09-02-2019
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I'm not convinced that's a kit spur. I've known of slipper issues when using off-brand spur gears, due to thickness. kit spur us 80 tooth.

Kit pinion is a 22 tooth, which is fine for 7.5/6.5 motors.
With a 10.5 turn, you want to be at a 24/25 really.
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Old 09-02-2019
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Tbh I donít think it would be a kit spur, the guy I bought it off has changed a few bits, of which heís given me lots of spares, I would like to work out whatís the standard bits etc then put it back to stock.

Iíll get a new pinion, the car has different arms (gul arms) is this a good idea to keep it put back to stock?
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Old 09-02-2019
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Quote:
Originally Posted by Shaundesigner View Post
Tbh I donít think it would be a kit spur, the guy I bought it off has changed a few bits, of which heís given me lots of spares, I would like to work out whatís the standard bits etc then put it back to stock.

Iíll get a new pinion, the car has different arms (gul arms) is this a good idea to keep it put back to stock?
Depends on the tract surface you run on really. The gull arms are currently run on both high and low grip as they offer more corner speed. Ensure you have the gull front tower too.
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Old 09-02-2019
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Predominantly run on high grip carpet, the tower has been changed and has the appropriate one for the arms
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Old 09-02-2019
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Old 09-02-2019
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Yeah you have the newer arms on it. stick with those for sure.
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Old 09-02-2019
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Would you recommend anything else?
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Old 09-02-2019
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After sorting the spur gear, just run it and get it tuned to the track you are running on. you could spend more money on it on new bits, but run it as is not now and see what it does.
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Ok perfect thanks, Iím gonna run 35 in the front shocks and 40 in the back with 6k oil in the diff
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Old 09-02-2019
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That spur looks a bit worn actually, tips of the teeth shouldn't be THAT flattened off.
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