gs850 wont rev?

[peterhankinson]

hi
iam on the final stages of restoring my gs850 every thing cleaned, polished, renewed,replaced ect fitted the engine and carbs started up no problem bloody thing wont rev as soon as a little throttle applied coughs and splutters and cuts out backfires from carb one and every 20 seconds or so has a loud bang from lefthand exhaust can anyone point me in the right direction as to where i start looking. the engine has been standing for about year (according to previous owner?)
many thanks inadvance peter (uk) ps cv type carbs

[catbed]

its a good idea to put your bike in your sig so you dont have to say it over and over.

did you adjust the mixture screws at all? back them out another half turn and try that.

[Nessism]

Most likely you need to clean the carbs and replace the o-rings, including those on the rubber carb runner "boots" as we are apt to call them. http://www.thegsresources.com/gs_carbrebuild.htm

http://cycleorings.com/

[peterhankinson]

thanks for info needed to be turned 1 full turn and a bit, up and running just need a final tweek but will leave that to auto shop as they have all the proper tuning gear.. then wait for a bit of good old british sunshine (yea right) and a few minor jobs to finnish it off, and take it for a run many thanks peter