Gary_in_NJ wrote on 10/20/16 at 07:23:35:Papa Bear wrote on 10/20/16 at 05:32:15:
How many plugs does the bike have?
This question makes me suggest that your bike be dealer serviced.
I can certainly see where my question would prompt such a reply.

I spent some time researching last night and had numerous sites where the plug number was listed under 'SPARK PLUGS' (plural)
I just wanted to be sure I wasn't missing something.
I'll be 73 yrs old soon, my first bike was a 1964 Suzuki T20
I also owned a 500 Titan along with a 1965 BSA 650 Lightning Rocket, Triumph 200 Tiger Cub, '79 Kawa 400 LTD. etc.
I quit riding in 1980 as my alcoholism was causing me to repeatedly drink/ride/crash - I had to quit riding or quit drinking ...so I quit riding.
Fast forward 35 yrs (I joined AA in 1989 and have 27yrs sober) and I picked up a little 150 SYM Wolf that I put 21,000Km on in a couple of years. I rediscovered the joy of riding - riding sober is a lot better than riding drunk !!
My little 150 is a blast for urban/suburban riding but I wanted something that I could get out on the highway with ... not too big, not too small. The S40 seemed to catch my fancy.
If you loved the 200 Tiger Cub or BSA 441 you will love the S40 even more.

Anyway, I read about the cam chain tensioner - are they bad right out of the box or can I enjoy this bike for a while before having to address the tensioner? My bike was owned by a lady and I ride like a grandfather (which I am) so do I have to be worried about it yet?
Also, what about fuel grade - does the S40 run it's best on regular fuel or it it worth gassing up with mid-grade or high-test?
Do you guys/gals use Iridium spark plugs or regular ones?
Thanks for your time:
Bob