[Shamsul Kamal]

My bike now have bluish tint at exhaust pipe behind radiator, heat due to lean fuel mixture?

Black "scratching line" due to stone/sand/discolouration?

Pics below.

 

[Stitch]

The "scratch lines" I think are also much like where the blue tint thing, is coming from the heat generated. I think these things naturally happen when they get that hot, it gets the "burnt look"

 

[Limited Edition]

The blue tint looks cool. I can't say for sure if it's a lean mixture. It reminds me of those titanium tips on car exhaust. The scratch line looks more like debris kicked up from the the road and got burnt from the heat of the exhaust. Did you ride somewhere with a lot of debris? Try washing it off.

 

[Stitch]

You can potentially try going at it with metal polish to see if it'll clear up a little bit first ?

 

[Shamsul Kamal]

You can potentially try going at it with metal polish to see if it'll clear up a little bit first ?

I don't really mind about the bluish tint. but i do worried the reason why it is there in the 1st place.

Sometimes, after a hard ride there is a burning smell coming from the engine.

I will ask the hq dealers/service centre asap which is not in the near future since they are about 330 kms away and open only on weekdays.