My bike just splutters, I can't take it over 20, it feels like it wants to go, but it doesnt. I've replaced the stator and the coil unit. s6inletmanifold, 25 carb, s6 air filter, 172, bout it really. I've made sure the carburettor is on tightly, just bought a brand new iridium spark plug. I don't know what else to say to be honest, or do.
try cleaning the carb out mate using a compressor if youve got access to one. sounds like a fueling issue, also check the fuel tap isnt blocked or stuck closed, as you say youve replaced the stator and coil so if its still doing the same as before you can rule those out for the minuite. check reeds maybe too?
sorry didnt read properly. skipper is right. try carb and choke cleaner down the carb whilst running, but you`ll need to rev it abit when you do - its a quick and easy thing to do before grabbing out the tool`s try taking off your carb, strippping and cleaning. its only 20 min job and it will run more efficiantly
spraying carb cleaner in a running engine will lean it out. as for brake cleaner, that stufs just FAR too strong. most p[otent chemical you can legally buy (trichloramethaline i belive its called, hey its early) so again i wouldent sudgest spraying while running, it wont clean the parts of the carb that potentially get dirty anyway... easier to just take it off, pull the slide/bottom out and give everything a good clean/squirt through wiht the carb cleaner. fact is a 2 stroke engine is luybricated by residual oil, atomised into the air and then "condenced" back on to any surface it hits (basicly its sprayd round the engine in the air) using strong solvent based cleaners will remove any stiction/viscosity of the liquid (no lubrication) wich will heavily reduce the life of the engine, this can happen wiht fuel (somtimes described as bore wash) where the bike runs rich in oil and fuel (poor setup/mix quantity's of fuel and oil) the rich fuel overwhelms the surfaces of the engine, turns from a mist back to a liquid and "washes" all the oil away, the "bore" (yes the bore is where the piston sits and is part of the cylinder/barrel) is usually the first thing to go with these conditions. fuel as a mist is more a gas than a liquid, and in such is nowhere near strong enough, nor in high enough concentrations to remove oil (theres just not enough of it to wash the oil away, this is how oil's are formulated and the reason you have to use 2 stroke and not just "oil") so ye, in short give the carb a clean, check the reeds, check the fuel tap, if its not this id be sniffing around the oil seals/rings... but check the obvious things first.
