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Post by moore77363 on Jul 22, 2021 3:15:25 GMT -5
I just installed a Naraku 70cc Big Bore Kit on my Yamaha Zuma 50. The problem is I cannot get a definite answer on what the proper spark plug is for the aftermarket cylinder head.
Does anybody potentially know what spark plug should be used?
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Post by captincvmn on Jul 22, 2021 11:18:29 GMT -5
If it’s a Naraku cylinder and it reuses the stock head use the stock spark plug.
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Post by geoffh on Jul 22, 2021 14:53:41 GMT -5
I,be looked into the naraku 70 kit should just be NGK BR8HS,fit one and check for clearance before you turn it over.
Geoff
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Post by moore77363 on Jul 24, 2021 0:08:13 GMT -5
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Post by Zino on Jul 24, 2021 0:40:55 GMT -5
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Post by moore77363 on Jul 26, 2021 16:06:00 GMT -5
It’s not the NGK BR8ES either. I just tried it & it protrudes to far past the cylinder head & would come into contact with the Piston.
It’s longer than a NGK BR8HS. But Shorter than a NGK BR8ES.
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df41590
Scoot Enthusiast
Posts: 285
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Post by df41590 on Jul 26, 2021 18:38:49 GMT -5
NGK doesn't make a plug with a reach in between H and E for non-tapered plugs. www.ngk.com/ngk-spark-plug-numbering-systemsI had the same issue when I tried using the naraku head on my polini contessa. Think naraku expects people to use multiple base gaskets, so the piston doesn't close the gap on the plug. |
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Post by moore77363 on Jul 26, 2021 19:38:21 GMT -5
Well that’s dumb. The kit only came with one base gasket. You’d think if they intended for multiple gaskets to be used they’d include MULTIPLE GASKETS.
Anyways I’ll probably switch back to the stock head & spark plug since they are compatible.
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df41590
Scoot Enthusiast
Posts: 285
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Post by df41590 on Jul 26, 2021 22:00:06 GMT -5
With the stock 50cc head definitely check squish to make sure it's not too tight. You want at least .7mm.
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