Not really that hard to do, you need top pop the glovebox up so you have access to the engine bay, one by one, remove the plug lead\cap to expose the top of the plug, use a proper bike plug tool to get to the plugs or else you will need to loosen the battery box so you can get a socket down the plug tube. Once the plug is replaced, complete for pots 2/3/4 and you are good to go . Corect Plug is a CR7HSA with 0.7mm plug gap Warning - check the manual in the recources section for more info, do not overtighten the plug
oh really? So i can access all 4 plugs from the under the glovebox? Also do you have a link as to what a proper bike spark plug tool is? lol Thanks!
I have one of these. Works a charm. If you get your new plugs first, you can check the size in store before you buy. http://www.supercheapauto.com.au/on...-Plug-Wrench-Flex-13-16-.aspx?pid=12547#Cross
So i decided to tackle the plugs today. What an anooying job !! Battery and the holder had to come out. Had to cut the cable tied loom to move it out of the way just to even get the plugs off lol. Very tight space. All done now - bike runs smoother but still has that miss in top end. Must just be the tune.
Have a look at this thread http://2fiftycc.com/index.php?threads/zxr250a-not-starting-again.2019/page-3#post-18380 There's a video there that talks about diagnosing carb tuning requirements from bike behaviour. May be related to your issue.