2012 Speed R - Chain And Sprockets

Guys

Looking for some guidance/advice on replacing the chain and sprockets on my 12' speed R.

From my local mechanic I have been quoted roughly £200 fitted for stock (not OE) size sprockets (18/43 I believe) and a Tsubaki gold chain (don't know the p/n).

Would you consider this a reasonable price?

And.... what other options have I got? Have been reading lots about -1 tooth on the front and/or +2 (or more) on the rear to give more acceleration, and I guess easier to wheelie! However, I'm not a front end up kind of rider, and so leaning more towards stock teeth, although saying that, I do quite like the idea of quicker acceleration!

What is the chain length - 525/530?

Having browsed the web, it seems like a bit of a minefield, and I don't want to buy the wrong thing!

Bike is on 30k and I think original chain and sprockets, so it's definitely time to replace.

Also, is it best to replace the chain guides too?
Number 20 & 27? in this diagram:



Thanks in advance for those who give me the knowledge

The bike:

 

Hey Dawsy

I am pretty confident I could do it myself yes, however I do not have the riveting tool, and I believe they are quite expensive to buy? Don't know anyone who has one I can borrow either.

I would rather pay the £60 and know it's been done right tbh

 

Just to update, the task has now been completed thanks to a friend of a friend who had the chain splitter/riveter

I went for stock sized front (18T) and +2 on the rear (45T) and it's absolutely bang on! More low down power/acceleration but not so uncontrollable that it wants to wheelie at the slightest pull of the throttle

JT sprockets and DID chain



NB the chain tension was reduced post photo

 

Nope! Based on my GPS speed, the clocks are pretty close tbf