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Old 04-03-2005, 01:17 AM   #1
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Default Mugen X12 engine thread

What are the base carb settings for the X12?

Last edited by Striker; 04-05-2005 at 06:12 AM.
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Old 04-04-2005, 02:57 AM   #2
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Anybody run one in a NTC3? If so, what header length did you find to be the best lenth for top end power?
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Old 04-04-2005, 11:57 AM   #3
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Quote:
Originally posted by Striker
Anybody run one in a NTC3? If so, what header length did you find to be the best lenth for top end power?
Cut 11mm off the stock length....
About needle setting.......there are no stock needle setting for Nova Rossi carb....unlike OS engine or other cheap engine.
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Old 04-04-2005, 03:40 PM   #4
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the X12 is basically a Nova Rossi NSR12 engine. My carb settings are 4 1/2 out on the top end, 3 1/2 out on the bottom end. Keep in mind, my friend has the same engine and his top end is 5 1/2 out on the top. Needles do differ, but this should get you in the park.
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Old 04-04-2005, 03:57 PM   #5
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Quote:
Originally posted by cdelong
the X12 is basically a Nova Rossi NSR12 engine. My carb settings are 4 1/2 out on the top end, 3 1/2 out on the bottom end. Keep in mind, my friend has the same engine and his top end is 5 1/2 out on the top. Needles do differ, but this should get you in the park.
Hi. The X12 is not the same engine as the NSR12. The NSR is microcast piston, and the X12 is not. Also the timing is different. The X12 is better. The base needle settings for the Mugen X12 are 5.5 turns out on the high speed needle, and 3.5 turns out on the low speed needle. Needle settings will vary dramatically depending on the type of fuel you run, weather, and if the engine has any internal modifications. I have found that on the X12 the low end, and spraybar are pretty close from the factory. The high speed needle is set for break in from the factory.
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Old 04-04-2005, 04:21 PM   #6
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Uriah:

If the crank timing is different, then how come the part number for the NS and the X are the same?

BTW: The modded X12 you did for me ran great.
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Old 04-04-2005, 05:56 PM   #7
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Sleeve port timing is different.
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Old 04-04-2005, 07:43 PM   #8
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Now, I do like to wirte those info down myself for future reference.....thanks guys
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Old 04-05-2005, 12:34 AM   #9
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Quote:
Originally posted by Grinder
Sleeve port timing is different.
The part numbers for the sleeve of the NS and the X12 is the same also.
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Old 04-05-2005, 04:59 AM   #10
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I know, but they are different. The crankshaft also went through a running change when they changed from standard to turbo. They lightened it, but still the same part #.
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Old 04-07-2005, 12:26 PM   #11
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x-12 is an awesome motor. it really comes alive with a turbo button in it.
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Old 04-20-2005, 12:33 AM   #12
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Quote:
Originally posted by Grinder
Hi. The X12 is not the same engine as the NSR12. The NSR is microcast piston, and the X12 is not. Also the timing is different. The X12 is better. The base needle settings for the Mugen X12 are 5.5 turns out on the high speed needle, and 3.5 turns out on the low speed needle. Needle settings will vary dramatically depending on the type of fuel you run, weather, and if the engine has any internal modifications. I have found that on the X12 the low end, and spraybar are pretty close from the factory. The high speed needle is set for break in from the factory.

Can someone tell me what the mid setting should be?

Thanks,
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Old 04-20-2005, 07:00 AM   #13
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Quote:
Originally posted by bhambrent
Can someone tell me what the mid setting should be?

Thanks,
flush with the carb body
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Old 05-16-2005, 11:37 AM   #14
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Default air filter

I was wondering what air filters you guys are running on this motor? Im running the one that came with my MTX-3 and its time for a replacement. Any links would be helpful.

Thanks,

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Old 05-16-2005, 01:52 PM   #15
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Any foam style filter will be fine...RB, RD logics, GQ.....etc.
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