MV 175 CSTL Spark Plug - MVAgusta.net
 
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post #1 of 7 (permalink) Old 07-05-2015, 10:27 AM Thread Starter
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MV 175 CSTL Spark Plug

What spark plag should I use for the CSTL ? What are your expierences? In the handbook the write Magneti Marelli 275, what does this mean about 60 years later?

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post #2 of 7 (permalink) Old 03-15-2018, 03:07 PM
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I'm going through exactly the same process right now. Manual says Magneti Marelli 275, but I can't find any cross references to that number in current day cross reference charts.
Mine is currently fitted with a champion L82YC. The L corrseponds to a 14mm thread 0.5" deep, which seems to correspond to my thread depth in the head. The YC is standard projected nose and a copper core. The 82 is the heat range. My plug seems a little dark in colour (Milk chocolate brown) which may indicate its running a bit rich, but the jets are standard in the carb, or that the plug is a little cold.

Anyone have any thoughts or know what the correct plug should be for a 1957 175CSTL?
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post #3 of 7 (permalink) Old 03-16-2018, 05:07 AM
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NGK B7 would do the job
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post #4 of 7 (permalink) Old 03-17-2018, 06:09 AM
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Thanks. Have ordered some.
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post #5 of 7 (permalink) Old 04-11-2018, 08:18 AM Thread Starter
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Thanks for your help, I will try this.

Regards

Alexander
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post #6 of 7 (permalink) Old 04-11-2018, 11:28 AM
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Quote:
Originally Posted by GTW36 View Post
NGK B7 would do the job
If memory serves a NGK B7HS for 1/2 inch reach. ES is 3/4" reach.

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post #7 of 7 (permalink) Old 04-11-2018, 09:06 PM
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Quote:
Originally Posted by Teeps View Post
If memory serves a NGK B7HS for 1/2 inch reach. ES is 3/4" reach.
You are correct, sir.

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