Spark plugs

[wmc83]

Looking at plugs for my 250 the manual says to use a b8egv is there any reason why you can't use cheaper plugs such as b8es or b8eg? Will there be any performance difference?

[Freakshow]

its the wire tips. 
So Unless your running PVl ignition then an Es will work for you anyway.

[DR]

This is bound to ruffle some feathers but there's no noticeable difference in performance that can be felt and they aren't as susceptible to fouling. All good to me

[bigk]

I find he opposite Doc. I've had a bad run with ES series plugs (may have been a crook batch) but now religiously use EG series with nil problems so far (over a year now).
Cheers,
K

[090]

I can't justify the expense myself and use them on all my bikes with no drama (ES or HS as the case may be). All different ignition systems, pvl, cdi,motoplat.

[Canam370]

If you are on the throttle hard a lot of your riding time the fine tip plugs are less prone to promoting pre-ignition. They can be more prone to fouling as the fine tip is more easily covered by oily deposits (if your jetting is less than perfect), particularly during start-up or when you are just tooling around.The wider tip ES plugs have a greater area for the spark to pass the deposits. Used to be that a ES plug would be used to start up and clean out then swap to a GV/EIX to race. Hope this helps.

[oldfart]

 Tried them all  with varying results to hip pocket from  EIX to ES. It depends on which fuel you use on the day ( shell is shit ) I prefer caltex and seem to get about 3 meetings with Es series, then I will front up to a meet and they will fowl up with for no  reason . I have put it down to fuel and todays additives. Presently have ES series in bikes.

[JohnnyO]

I run B8ES in all my bikes and haven't had a problem. I can't tell any difference from a BR8EGV and can't justify the extra $$$.

[LWC82PE]

Tried them all  with varying results to hip pocket from  EIX to ES. It depends on which fuel you use on the day ( shell is shit ) I prefer caltex and seem to get about 3 meetings with Es series, then I will front up to a meet and they will fowl up with for no  reason . I have put it down to fuel and todays additives. Presently have ES series in bikes.

Yeah thats correct, nothing wrong with the plugs. Biggest hassle these days is the fuel. Plugs havent changed, fuel has.

The standard NGK ES blugs are anchient technology. I recommend use the recommended plug as per your bikes owners manual or upgrade to a higher spec plug. Manufacturers have selected a particular plug for the engine for a specific reason. Why go against what they say? if you want better starting go with EIX.

[JohnnyO]

Also the BREIX and BREGV plugs are no good with a PVL ignition as they have a resistor in them and are not recommended by PVL.
The petrol/oil mixture and jetting are more relevant to fouling plugs than using a std ES plug.

[wmc83]

Cool I think I'll see how it goes with the es as I've got some jetting to do and I didn't want to shell out for a heap of expensive plugs
Thanks

[BAHNZY]

It depends on which fuel you use on the day ( shell is shit ) I prefer caltex

The cocktails available from today’s fuel bowsers are so far removed from the specification that was available in the early eighties & prior. Could get into a very philosophical discussion over fuels (god knows there have been a few elsewhere on this site) but it is a pointless waist of time for the subject of this thread. The thing to remember is that today’s Hi-Octane, and for that matter ULP and PULP are designed for highly developed fuel injected engines, not for 30 year old air cooled engines with a varying range of 2 stroke lubricants & mix ratio’s that were originally specified for leaded fuels. Is a bit unfair to blame the spark plug for fouling given some of the blends that we throw at it.

[Lozza]

The further up the slippery slope of tuning you go,the better the plug that is required. A 125 kart engine tuned to the point of detonation each time it hit the track, would not complete a lap on a EV,EGV or EG plug demanded an iridium plug. When we switched to proper race plugs laptimes dropped and took a tooth off the rear.
PULP is great fuel, consitenetly consistent, doesn't care what engine it's in you just have to learn what to do to get the most out of it.
Led to believe methanol likes ES plugs but have heard of people using EG/EGV/EV plugs.

[oldyzman]

Hey johnny,
What range of bikes do you run the B8ES in...
Brett

[JohnnyO]

I use an 8 in my 250's and big bores.. Would maybe run a 9 in a 125 if i raced one.