September 21, 201411 yr hello all just want to know what would be the best spark plug for my 199B? i have used NGK bp5es on other bultacos what you guys useing? cheers bondy.
September 21, 201411 yr NGK BP 5 ES is good. NGK BP 4 ES is my personal choose for trials riding, much better durability and color. The colder 5 seems to run to cold still black while the hotter 4 has a nice brown color as it should. For trails and street riding I would use a 5. Better are the old Champion N-12Y, they offer a broader temperature range but difficult to get in these days.
October 1, 201411 yr Hullo P Schrauber, you can get Un12y plugs at :- the green spark plug co -: but they are quite expensive. Hope this helps,regards,John.
October 1, 201411 yr Author i ham just staying with the NGK bp5es can't seem to get the denso 1 think there all the same anyway.
October 1, 201411 yr Author hello dabster who makes the ix vx? also are they any better Edited October 1, 201411 yr by bondy
October 2, 201411 yr Iridium plugs fire easier. I used to run Champion N11Y or N12Y in my 325 Bultos. I think 12 is same heat range as NGK4. Champion (QN86) is the only plug I have ever had fail prematurely, failed after about 45 minutes running for no reason
October 3, 201411 yr Im going back to the early 80's and its coloured my opinion of champions, and recently never had a problem ever with an ngk, but i change every couple of months tops.
October 3, 201411 yr Bondy, I just looked at the plug in my 199, NGK BPR5EIX-11. We have used this plug for several years, it was recommended by a good friend. Have not had any issues since going this way at all. Regards Larry
October 4, 201411 yr The different types of plug are on here http://wemoto.wordpress.com/2012/08/07/ngk-spark-plugs/
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