trying to figure out what is wrong with my bike just bought it so i dont know a ton about it. It started fine when i bought it. Took it to the dunes and it just got harder and harder to start throughout the day and now i cant start it. It also didnt like to idle. I turned the idle up kinda high to keep it running and after a few seconds letting it idle it would still die. I measured the valve clearances and they seem to be in spec. It has good spark. The timing is good. But it looks like maybe its not getting fuel? Not sure if im checking it right but i twisted the throttle and kicked it probably 30 times and the spark plug was still dry. Any advice is appreciated thanks.
250F Crf250r wont start / starts extremely hard. Wont idle
- Thread starter 2001yamahashee
- Start date
I would start with cleaning the carburetor really well and try again. Setting the float is a crucial part of carburetor cleaning.
Otherwise, you're completely on the right track by checking the valves.
Next is a compression test, and leakdown test if low. -BIG DAN
Otherwise, you're completely on the right track by checking the valves.
Next is a compression test, and leakdown test if low. -BIG DAN
I would start with cleaning the carburetor really well and try again. Setting the float is a crucial part of carburetor cleaning.
Otherwise, you're completely on the right track by checking the valves.
Next is a compression test, and leakdown test if low. -BIG DAN
Great this is what im looking for. I just want ideas of whats next to check as i check things. How do you set the float?
Are the valve clearances within spec or not? Can't "seem to be" they is or they isn't. Keeping a clean air filter is very important and especially difficult in sandy conditions. Dunes will swallow up a 250f not really the best bike for that but, run whatcha brung I guess. Carb is pretty easy for the basic stuff, plenty of Googly info already but basically, gas fills the bowl lifts the float and pokes a coney shaped plug in the gas hole stopping the flow. Either stops it too late- gas pees out the tubes on the ground or stops it too soon and not enough gas to run the bike. Bend tab. Find happy middle.
Clean jets- I prefer carb spray guitar string magnify glass and flashlight
Good luck
Clean jets- I prefer carb spray guitar string magnify glass and flashlight
Good luck
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in that situation if it starts with the choke on and not with choke off then it is a plugged pilot jet. Hard starting can also be a sign of tight valves.
Pulling th carb is a bigger job than i thought. Not saying i dont want to do it but do you think maybe i should just pull the jets out and clean them instead of taking the whole carb off?
When it comes to bikes, or anything mechanical for that matter, shortcuts are never the best way to do a job. Get used to doing what needs done an do it properly or not at all. Loosen air boot clamps, Lift subframe, leave throttle cables attached and leg carb hang while you work on it. Wipe it down clean before cracking open.
no matter how much gas you dump out it will still have some inside so prepare for that with disposable rags or old t-shirts. Yes it's messy
no matter how much gas you dump out it will still have some inside so prepare for that with disposable rags or old t-shirts. Yes it's messy
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Alright was just wonder because somone said it could be a pluged jet. Im taking it out tonight. Doesn't look very hard
I was just about to pull the carb off (got tsub frame off and shock moved) and was twisting the throttle and i could see it shooting gas straight into the intake. It has good spark and im guessing its gotta be getting fuel because it was shooting it pretty good. We even tryed starting it with starting fluid and it wasnt even trying. Could it not be getting oxygen somehow? Or maybe somthing with the valves or really bad compression? Or should i just still take the carb off and clean it?