does anyone know the latest price for Dunlop TT900?

actually i know nothing about tyre. i ask this model as it's the original tyre for my honda wave 125S and not to get cheated by local workshop.

i'm riding Honda wave 125. there's a sticker on the engine recommending Castrol and i just changed to Castrol Race 4T 20w-40. i wonder which oil is suitable. i rarely use this bike, sometimes once a week but sometimes continuously for few days. mostly from cold start.

i dont know what's the recommended interval for service as i bought it as 2nd hand and no manual was given to me.

i also heard that it's at the range. the problem is i only do around 500km half a year. i believe the interval can be either in KM or certain period of time, whichever comes first.

my wave 125 cannot start after leaving it for 10 days. it only has kick starter. i managed to start it once in a while with chock but it shut down everytime i try to fuel it. i didnt have this problem even leaving it for 3 weeks last time. i changed the spark plug 3 months ago. where is the plug located anyway?