Tachometer is nuts

[darrsi]

As my fazer is a carb model. How does this faulty TPS affect the bike? Will it make a difference to the handling? I think my carbs need ballancing, but I'm not sure it's related to the sensor.

A faulty or knackered TPS will make the bike idle roughly, be very jerky under 3000rpm with the need to really use a lot of clutch to control things, and the bike will generally run a bit shite.
Even when the TPS was not in the correct position i learned to realise the difference in feel of the bike.
You need to check the TPS positioning before and after a carb balance so if you think it's faulty don't even go near the carbs yet.
Also, when contemplating a carb balance, you need a clean/unclogged air filter as well for best results.