1 86 K100RT Rough Running, Heavy Carbon Deposits Sat Jun 08, 2019 8:54 am
JakeS41y
active member
I've been slowly working my way through bringing a K100RT back to life after sitting in a shed for ~7 years (according to the previous owner) and one thing that I noticed is that it started to run really rough after I was able to get new fuel into it. I rode it to the station on basically empty and refilled with 98 Octane (Premium) in the hope it would compensate for the little bit of dead fuel and lack of recent. When I opened the tank it looked like there was a little bit of smoke in the tank (which might have just been evaporated fuel fingers crossed) and once I refuelled and left the engine started to run rough and would only run "smooth" at or above 1500rpm.
My plan to fix it is to replace the spark plugs (along with a bunch of other stuff it needed, including a rear main seal and new clutch disc among other things) but when I removed the old ones the and had a look at the cylinder head it looked very sooted (I've attached a photo, I think). The plugs where sooted too but they were probably fairly old too. Would this be typical of a recently revived bike? Should I run an fuel additive or something else to try and help it clear the carbon deposit?
My plan to fix it is to replace the spark plugs (along with a bunch of other stuff it needed, including a rear main seal and new clutch disc among other things) but when I removed the old ones the and had a look at the cylinder head it looked very sooted (I've attached a photo, I think). The plugs where sooted too but they were probably fairly old too. Would this be typical of a recently revived bike? Should I run an fuel additive or something else to try and help it clear the carbon deposit?