Starting Problems

[Tomahawk]

Ive posted about this before but didnt think anyone would see what else i have to say if i just posted back haha.
Anyway too the point my bikes not been starting well for about a month now and its annoying. It will bump start easy its just on the starter it just doesnt give me anything and just pisses about. Then when i release the starter button it makes a hissing noise as if its releasing air from somewhere? Is there like a compression release valve or something when its starting? Its just once the bikes started and warm i get no such problems. Ive got new spark plugs to put in but dont think they will do much.
Help please.

[Evilchicken0]

Various things can help cold starting.
New plugs always help but propbably won't cure the problem.
That it bump starts easily is interesting, I'd say the battery is probably not spinning the starter quick enough when it's cold but when it's warm the engine chatches a little easier. Have a look at the battery connections and the earth cable. Try some jump leads to a car battery (don't run the car when you try this) use some "motor bike" jump leads the clips are smaller and easier to get onto the battery, if that works then replace the battery and maybe go for a higher rated one.

[Tomahawk]

Yeh will give that a go. Like you said about the battery it just sounds like its not trying at all there is just nothing there. And when i give it throttle it makes it worse. I brought a battery not to long ago but will still check. Next week im checking the carbs and float heights compared to my old carbs. Even tho my old carbs made it run so so bad it started fine with them on so maybe the new ones just arnt set up too well for starting the bike.

[Evilchicken0]

Are these carbs balanced and set up ???
If / when they are you should wait till the fuel pump finishes open the choke and hit the button, no throttle

[Tomahawk]

That may be the error i made. When i brought the new carbs i only checked one float bowl and its was fine. Put the carbs on and it ran fine but didnt start too well. I was just happy to have the bike running nice for once. Maybe they need balancing or the pilot jet is wrong. I will see what the settings are like in my other carbs idle wise as it started on with them on just was shit it all other aspects.

[Evilchicken0]

It sounds like the carbs just need to be set up for the bike. Give them a clean and take them to dyno for a dyagnostic, there souldn't need to be any need for them to open them if the bike's running well.