I use an old drain cleaning spring (a DIY tool thats pretty near useless for clearing blocked drain/waste pipes but quite useful for cleaning exhausts) connected to a drill. Feed the spring in (best to do it from the engine end of the exhaust) attach it to the drill, then go mad but slowly.If anyone has any tips for cleaning out the inside of the exhausts i would be grateful
Once you have the majority of the crud out, then its time for good old caustic soda. If you are using Kr1 pipes then block the outlet of the pipe & pour the evil/deadly soda mixture in (please be careful not to get this stuff on you or anything else you care about, it really is naughty stuff!) & leave for 24hrs or so.
Do NOT use caustic soda on aluminium (like Kr1s cans!) as it will knacker it.
Then carefully (after 24hrs) remove the bung (over a drain is good, two birds, one stone etc) & let the soda out.
Once the exhaust is dry again repeat the process (waste cleaning spring/caustic soda) until you are happy.
Hopefully one day, someone will invent a way of cleaning the inside of a 2 stroke exhaust without resorting to this method [-o<