October 14, 200916 yr I am sure it has been mentioned somewhere here but a quick search did not turn up the answer. What NGK plug to I need for my almost complete M159? I have ordered the rings and clutch thrust bearing. I have turned a box of parts into what I hope will be a running engine.
October 14, 200916 yr I use a B7ES in mine. Most NGK catalogs say BP5ES but i think that plug is a little too hot. I used the same B7ES in my M159 for 4 years and never fouled it, never had any problems with it. I probably had 150 hours of riding on that plug. I only changed it as a preventative measure not because it wasn't performing properly. Steve
October 14, 200916 yr If you are using it for trials competition a BP5ES is ideal. I use BP5ES in my OSSA, Bultaco and Montesa twinshock trials bikes with no issues. If you are doing road riding or energetic trail riding, then go for a cooler plug.
October 14, 200916 yr Author Thanks for the advise maybe I will get one of each and see if it make s a difference Mike
October 14, 200916 yr Here's my notes on the spark plugs. [url="http://web.me.com/davefriesen/Site/Bike_Updates_Blog/Entries/2006/8/17_The_Power_of_
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