I just replaced the R43S that were in the engine with the R44S that I bought off of Ebay. All I can say is what a difference it made. The engine is smooth and the throttle response is almost instant with no hint of hesitation like before. I also looked at the R43S that came out and all except 3 were carbon fouled. I won't run that cold of a heat range plug ever again and I strongly advise that others do the same. These engines need something a little hotter to get the most out of them and the R43S just don't do it.
Hello mrbuick65 I may be in need of 44s plugs are you still offering a set for sale? you can email me if you wish I am new to this site so please forgive me if my reply contact method is incorrect regards Barry PS. its telling me I must remove my email address not sure how to do that I will try!
