CBR250R won't start

[SMOKEU]

I just replaced the battery on my bike, and now it cranks over nicely but it just won't start. There is a strong smell of fuel so I'm thinking that it may be flooded. I tried starting it with wide open throttle and it still won't start.
I have made sure that the kill switch is on the 'on' position. Do I have to take the spark plugs out to clean them before it will start?

[=cJ=]

Yep, I'd do that.

Might also pay to check the plug gap while you're there, my one before the last one I had (yes, I've had two of 'em now ) tended to blow the plug gaps open which made for hard starting.

[SMOKEU]

Yep, I'd do that.

Might also pay to check the plug gap while you're there, my one before the last one I had (yes, I've had two of 'em now ) tended to blow the plug gaps open which made for hard starting.

It's going to be a cunt of a job to get to the plugs.

[p.dath]

Getting to the spark plugs out will be a big job. Easier to just let it sit over night.

Was the bike starting before you replaced the battery?

[SMOKEU]

Getting to the spark plugs out will be a big job. Easier to just let it sit over night.

Was the bike starting before you replaced the battery?

Before I replaced the battery it would start when cold, then stall after a few seconds as usual and then it wouldn't start again. It would turn over, but very slowly. The new battery seems to have solved the problem of the engine not wanting to crank over fast enough.

[Racey Rider]

Are you running it on 91 octane?

[The Pastor]

Drain carbs. Stay away from throttle on start up.

[=cJ=]

It's going to be a cunt of a job to get to the plugs.

Three of them are a piece of proverbial.

There's the dreaded fourth plug though, which has been located using plans drafted in the deepest levels of hades...

[p.dath]

Another long shot; wondering if the bike is actually starved of fuel. Any chance the fuel tank is almost empty? Try turning the fuel tap to reserve and see if it makes a difference.

Can you see the fuel filter? Not full of shit is it?

[SMOKEU]

Another long shot; wondering if the bike is actually starved of fuel. Any chance the fuel tank is almost empty? Try turning the fuel tap to reserve and see if it makes a difference.

Can you see the fuel filter? Not full of shit is it?

Fuel tank is about half full. I have tried turning the fuel tap to reserve, and it didn't make any difference. I can't see the fuel filter because I have to take off the windscreen, fairings, fuel tank etc to get to it. Looks like the bike will be sitting in the garage gathering dust from now on because I can't be bothered sorting it out if it's going to mean I have to strip things apart yet again.

[hayd3n]

Fuel tank is about half full. I have tried turning the fuel tap to reserve, and it didn't make any difference. I can't see the fuel filter because I have to take off the windscreen, fairings, fuel tank etc to get to it. Looks like the bike will be sitting in the garage gathering dust from now on because I can't be bothered sorting it out if it's going to mean I have to strip things apart yet again.

il buy it of ya for $400

[DesmoDAZ]

Hi, drain the carbs to get rid of any crap in the bowls, do this via the drain screws on the carb bowls, then remove the spark plugs and check them all, if they havenot been changed for ages save yourself a lot of hassels and buy 4 new ones, they are not cheep but really the best way to make ant small capicity 4 cylinder bike start and run well is to shout them new plugs, I've done a fair bit of work on the CBrs and the whole choke system and mechanical mechanism can be a bir of a problem, while your under the tank give the choke sliders on the carbs a good shot of crc or similar and make sure the chokes pull on and slide off correctly. Check you even have sdpark, check all fuses, undo the kill switch off the handle bar and give a good spray of contact cleaner, dry and re assemble. Lay off the throttle and use a little choke on start up. good luck

[SMOKEU]

il buy it of ya for $400

I have just received a $1000 bid on it.

[2 wheeled worx]

has the bike been sitting for awhile sounds like the idle jets and pilot jets are blocked try removing the carbs and bowls if you need any help contact me on 027 728 4888 also these hondas have trouble starting sometimes even from short sitting time drain the carbs via the srew at the bottom of each carb and then try cranking it up again

[Phreak]

I have a similar problem with mine, especially on really cold mornings. I use full choke, and NO throttle when starting. Sometimes takes a little bit of persuasion, but it cranks up eventually... But sometimes it'll start up no problems! Typical Honda... Lol.

New battery for winter is the best start, maybe get your carbs balanced and tuned again and new sparkies at the same time.

Hope it pans out good for ya!