I have a 44(H) 1984 TY250(L) and I am going through some confusion with spark plugs and resistor caps.

The manual says (yes I have the original manual) use Champion N5G - most cross references map this to NGK B6EV. However on http://www.yamahaty.com/english/bougiesen.html he maps the Champion N5G to B6EVX (high performance - no resistor). Any mono owners out there - what plug do you run?

The previous owner was running BR6ES with a plug cap that has a resistor in it as well. Does the resistor really make a difference? The only thing it does is reduce noise - does it interfere with the CDI?

thanks

Hi,

For what it's worth, I run BR6ES in my 59N 250 - manual says B6EV.

The previous owner used BR8ES (which is what that website you mentioned, lists).

Sorry but I'm not sure if my plug-cap is/isn't the resistor type; all I know is that it works.

John Crane [ http://www.tytrials.co.uk/trailandtrialsuk/prod_43121--3-Spark-Plug-TY250-Mono-amp-Pinky.html ] lists the BR6ES for the 250L.