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Spark plug skyhawk 48cc
Discussion at Motorized Bicycle Engine Kit Forum in the 2 Stroke Bicycle Engines & Kits forum. Hello, im after a spark plug to suit the skyhawk 48cc, i bought a ngk bp6hs but found the thread ...  | 
04-28-2009, 09:03 PM
|  | Motorized Bicycle Newbie | | Join Date: Apr 2009 Location: Little Grove, Australia
Posts: 15
| |  Spark plug skyhawk 48cc
Hello, im after a spark plug to suit the skyhawk 48cc, i bought a ngk bp6hs but found the thread too long, maybe its an aussie thing, the closest i could find was a ngk b5es, not sure if the numbers mean anything too but the thread length was the same, ta guys any info would be great.. 
Last edited by ElUnoSpeedy : 04-28-2009 at 09:04 PM.
Reason: spellin error
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04-28-2009, 09:28 PM
|  | Motorized Bicycle Elite Member | | Join Date: Mar 2008 Location: Bellingham, WA
Posts: 535
| | Re: Spark plug skyhawk 48cc
How did you determine that the threads were too long? Is it because the tip of the plug hit the piston or just because it was longer than the stock one? |
04-28-2009, 10:23 PM
| | Motorized Bicycle Newbie | | Join Date: Apr 2009 Location: Little Grove, Australia
Posts: 15
| |  Re: Spark plug skyhawk 48cc
Quote:
Originally Posted by Ghost0  How did you determine that the threads were too long? Is it because the tip of the plug hit the piston or just because it was longer than the stock one? | I just compared it to the original, and the threadn thickness was different too, wouldnt screw in, i am assuming that if it were longer it would hit the top of the piston, thats why the thread had to be the same length. |
04-29-2009, 12:00 AM
| | Motorized Bicycle Senior Member | | Join Date: Jan 2009 Location: Perth Australia
Posts: 92
| | Re: Spark plug skyhawk 48cc
set the gap then reinstall , push the bike so the piston dose at least 1 revolution then pull the plug and check the gap that is what I did after my concerns regarding the same issue ( it runs fine )
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04-29-2009, 12:32 AM
|  | Motorized Bicycle Senior Member | | Join Date: Feb 2009 Location: Bako, Ca
Posts: 77
| | Re: Spark plug skyhawk 48cc
try the NGK B5HS...
i got the same kit as you and i run that, really smooth riding now, and a noticeable performance increase ove the stock autolites |
04-29-2009, 02:06 AM
|  | Motorized Bicycle Elite Member | | Join Date: Feb 2009 Location: Arroyo Grande, Ca
Posts: 113
| | Re: Spark plug skyhawk 48cc
NGK B5HS or B6HS depending on your climate. The 5hs is the cooler plug, 40-80 degrees, the 6hs is for 80-110 ambient temps "according too SBP"
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Sun Tzu: To secure ourselves against defeat lies in our own hands, but the opportunity of defeating the enemy is provided by the enemy himself. |
04-29-2009, 05:15 AM
| | Motorized Bicycle Newbie | | Join Date: Apr 2009 Location: Little Grove, Australia
Posts: 15
| |  Re: Spark plug skyhawk 48cc
Quote:
Originally Posted by Shadeslay NGK B5HS or B6HS depending on your climate. The 5hs is the cooler plug, 40-80 degrees, the 6hs is for 80-110 ambient temps "according too SBP" | Ok thanks for the help, much appreciated.. |
04-29-2009, 07:44 AM
|  | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,684
| | Re: Spark plug skyhawk 48cc
Quote:
Originally Posted by ElUnoSpeedy i bought a ngk bp6hs but found the thread too long, maybe its an aussie thing, the closest i could find was a ngk b5es, not sure if the numbers mean anything too but the thread length was the same,.........I just compared it to the original, and the threadn thickness was different too, wouldnt screw in, i am assuming that if it were longer it would hit the top of the piston, thats why the thread had to be the same length. | All the plugs mentioned - the BP5HS, BP6HS, B5HS, B6HS have EXACTLY the same threads and exactly the same thread length (depth 1/2")
A BPES WILL have too long threads (3/4")
Try this: NGK Part # key
So if you bought an ES and the thread length is the same as a HS, I would take the HS back for a refund. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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