Idle screw fell out of my yamaha beartracker250 so i put it back in and i cant get it ajusted right even when i have the screw idled down it will be the right idle for it but it wont stay in any help

SOURCE: hesitation problems 2003 yamaha wr 450 f

sounds like a jetting issue. change the main jets starting from the largest one you own and work your way down.

SOURCE: yam ybr125 wont idle off choke,also cannot find idle control scre

you may need to replace your spark plugs

as the idle should remain constant as long as the tune of the bike is good IE oil changes done regularly / plugs cleaned and or gapped , air filter cleaned or replaced all of these can affect your bike.

hope this helps

SOURCE: Yamaha TTR 250, Idling Problem

check the inlet manifold rubber has not seperated from the aluminium part of the manifold ,this is very common on the ttr 250 and will cause the exact problem you have,if it is seperated either replace it or repair it with some good quality rtv sealant avoid sillicone sealant as it is not petrol resistant and will turn to jelly.adam

SOURCE: backfiring and won;t idle

check the gasket, etc. rubber housing between carb and engine. these will occassionally crack and cause problem you have descriped

David Parker

• 333 Answers
• Posted on Sep 17, 2009

SOURCE: i have a yamaha pw 80 that starts but stays revd

Check the screw on the side of the carb in the middle, just under the slide and screw it counter clockwise.If this has no effect I suggest you check the cable adjusters to make sure you have free play on the cable.

please leave fair comment if I have helped you

thanks