Winter Battery Blues - Spark Plug Blacks Finally I did the simplest thing. I took out the spark plug. It was printed with letters NGK B8ES Japan. The spark plug was black. I could smell gas on it. I called motorcycle dealer and asked if he has that spark plug in stock. He did. Drove there picked up 2 plugs and put new one in.
When I tired a non-resistor plug in my G5 it idled really high. I'm surprised it didn't on yours.CJ
Because the darn thing was actually GETTING spark! ...... Other than controlling the secondary coil collapse oscillation - you don't NEED no stinkin' RESISTORS!!
Glad you got it sorted! But how did that plug get so black - does anyone have any ideas? Time honoured laws of carburation mean the mixture was rich but this is not possible in EFI theory. Surely repeated failed attempts at starting while using choke would at worst oil the plug? And it's not a two stroke either. Am I missing something really obvious here?
We run 7s on bone stock Liquid coooled engines. 8s on Liquid Cooled Engines with performance mods, and we even run 9s and 10s on fored induction engines.My old 84 RZ runs 10s.
SIngh Ji.I would still check your Bat voltage with the bike runing from time to time.All the signs are there.on my C5 I found the double earth straps and a projected nose.If on installing this on your bike your Idle RPM went up. Then it means your engine actually likes the Plug. Just back off your Idle 1/2 turn. (On the EFI you will need a screw driver with a 90 Deg bend.
Wrong plug for the UCE.Way too cold, non-resistor and not a projected tip.The correct NGK plug for the UCE is NGK BPR 6 ES or NGK BPR 6 EIX.That's 2 heat ranges hotter, got a resistor and a projected tip.The B8ES is the correct plug for the old iron motor.When I tired a non-resistor plug in my G5 it idled really high. I'm surprised it didn't on yours.CJ
Glad you got it sorted!
In your opinion NGK BPR 6 ES is the way to go. When you got your G5, did you notice what spark plug was in it ? Was your bike also recalled and if so did the dealer put in a different spark plug after repairs ? Do you have a picture and dimensions of original plug ? Are you running the BPR 6 ES now and how is it ?
The C5 has two plugs. So I fail to see how a plug could prevent you from starting up.Ive tried runing the bike on a single plug and it runs fine. Even with the other terminal shorted.The HT coil as used on the C5 is just like the coil as used on the Banshee / RZ / LC.One coil two leads. Both sparks happen at the same time.
wow you lucky guys. Im all envious now.Learn something new here every day.So is this a central plug or is it off to one side.And I take it the second plug hole is blocked off.I should have a compatiblity sheet which lists all plugs with equvilents from other companies I will try and dig it up and post it.