took the plugs out this arvo
and they were clean YAY
thanks for all the help people!

my step parent person rang sprint 2 day and they said it sounds like a crappy carby
him and a mate got the compressor onto it and re adjusted the timing
now she runs good
ill clean the sparkys 2morro and see if they go black, hopefully not
if they do

My advice...
Your running to rich in you mixture and your timing may be out causing incorrect burning of the fuel/air mixture leaving carbon deposits in the chamber.

My advise would be to give her a good tune up once over and as stated above it will reward you in many ways.

Cheers

dont have a manual
and its pissin here at the moment so....
when i adjust the mixture it begins to die but ive never screwed it right in.
i also looked on the id plate and there is nothing there? (on the carby)

Another pretty common carb fault;

Can you stall the engine with the mix screw, carefully screw it in and when it leans out enough it should stall, if it doesnt stall someone may of wound it hard all the way in and damaged the end which will cause rich idle. If it does stall you can eliminate that issue and wind back out to where it was originally. Then start looking at float level etc.

Do you have a manual?

the choke plate is open when the choke is all the way in
i just replaced the plugs which are bp5es (and gapped them)
and they are dry and sooty
also at idle when the engine is warm no choke, fuel spits out the exhaust.

didnt say that itd cause them to go black, was mearing checking for optimum running

Are the plugs dry & sooty or wet & oily? Dry & sooty would indicate a rich mixture while wet & oily would mean an oil control problem.

My plugs would get wet & oily and even crusty every couple of weeks. I finally had the time to tear it apart and discovered I had broken two valve guides in half.

it also could be burning oil.

Incorrect gap will not cause black plugs, but excessively rich mixture will. This could be compounded by the wrong heat range plugs.

The book says NGK BP5ES from memory & in normal use these are perfect. I used one stage colder BP6ES in my old B10 sedans 1200 GX engine as most of my driving was done at highway speeds out here in the sticks & this proved to be just fine.

My money says that you should pop the air cleaner assembly off the carb & you need to hold the workshop book in one hand & return ALL carb adjustments back to standard with the other. Check the float level in the little window as part of this exercise
Once done, give the engine a full & proper tune up & it will reward you for your efforts with great economy, smooth running & willing performance. Go for it.