Spark plug replacement

sisdavid · #1 03-31-2008, 08:17 PM

What are the spark plugs that people have tried in these 2 stroke chinese engines. I have tried the champion cj7y, and didn't like it.

deacon · #2 03-31-2008, 08:33 PM

I think that I am running that plug or the motorcraft version it works fine for me but im not very discerning

**Ilikeabikea** · #3 03-31-2008, 08:37 PM

I'm still running the stock plug. But I think a lot people here are running NGK..................

Pablo · #4 03-31-2008, 09:21 PM

Quote:

Originally Posted by sisdavid

What are the spark plugs that people have tried in these 2 stroke chinese engines. I have tried the champion cj7y, and didn't like it.

NGK B5HS works great and they are inexpensive or maybe you could try the next range cooler B6HS, but supposedly the Chinese stock plug is equivalent to the hotter B4HS...which I don't agree with....but the stock plug is slightly different than the NGK in construction and electrode tip length.

As a side note: my reckoning says a NGK BR6HIX Iridium plug would fit...not sure how it would perform.

**paul** · #5 03-31-2008, 10:34 PM

i replaced my plug and not much difference at all. the spark plug wire i changed and it made a huge difference

Bikeguy Joe · #6 04-01-2008, 06:16 AM

Quote:

Originally Posted by CRUISER

i replaced my plug and not much difference at all. the spark plug wire i changed and it made a huge difference

Plug/wire/cap fo' sho'.

http://motorbicycling.com/f30/bicycl...-care-354.html

sisdavid · #7 04-01-2008, 08:40 AM

Thanks for the help I tried the Dimon fire. That is comp "forget the number" to the Champion cj7y, and I do not like the short threads. Could get carbon build up on bottom portion of spark plug threads

toytime · #8 04-01-2008, 05:40 PM

I am now going with a Champian L86c and I love the new sound I seem to be getting.
The plug is a bit too long and I may end up with probs. when I go to remove it but it did change the sound and feel of the bike, almost as if it is running a little richer now, from the sound of things. I have also used the "40501" which is what I seem to remember being an NGK but looking at it now, there is no "ngk" marking.

Bikeguy Joe · #9 05-26-2008, 04:39 PM

NGK B5HS (preferred)
Champion L86C
Autolite 4093 or 425

misteright1_99 · #10 05-26-2008, 05:03 PM

NGK B6HS Burns clean and lasts.....