|
01-11-2015, 09:03 AM | #2 |
Join Date: Jul 2013
Location: richmond,VA
Posts: 94
|
ngk irridium works best for me
|
01-11-2015, 09:21 AM | #4 |
Join Date: Mar 2013
Location: murphy n.c
Posts: 467
|
|
01-11-2015, 01:47 PM | #5 |
Join Date: Dec 2013
Location: Western New York
Posts: 454
|
Don't think this will answer your question directly, but my 150cc calls for the same heat range. Came from the factory with a standard NGK C7HA...still going strong at 5800 miles
Looked like this at 4500 miles....Don't think I will ever put an irridium in my scoot |
01-24-2015, 09:06 AM | #6 |
Join Date: May 2014
Posts: 13
|
That's a perfect looking plug color !!!!
|
01-25-2015, 08:52 AM | #7 |
Join Date: Jul 2013
Location: richmond,VA
Posts: 94
|
I have a 49cc scoot and use C7HSA. Other numbers on box are 4629.
Took a few rides to settle in, but not runs very smooth |
02-17-2015, 08:48 AM | #8 |
Join Date: Feb 2015
Posts: 257
|
When doing a BBK upgrade, which spark plug to use is only 1 consideration. and should be the last based upon what you did before it
the following information is relevant to GY6 50cc (39mm) stock engines: the stock 39mm piston has a convex dome that increases compression. the stock 44mm piston has a convex dome that increases compression the BBK upgrade 47mm, 50mm, & 52mm piston has a concave dome, reduces compression heads; stock 39mm & 44mm have smaller areas, higher compression 47 to 52 mm have larger areas & bigger valves, lower compression gaskets; many of the BBK suppliers supply gaskets that are thicker which reduces compression, and puts stress on the camshaft and journals; stress is extra friction which reduces power and harms the engine done right a 47mm BBK can supply enough power to perform exceptionally well and in some cases outperform the 50 & 52 only 1 supplier I have found that offers enough product differences to allow customization and obtaining the most power and he has to source from several wholesalers to get it |
|
|