cold starting lt250r

[NOS455]

I have a problem with my boys 86 lt250r it is a bear to start when it is cold after it starts and warms up kick it one time and it fires right up it has been rebuilt I put new pistion. reeds. gaskets and new 34mm carb with 190-45 jetting the bike runs real good once you get it running... any help for it ?

[NOS455]

no one has any ideas ?

[xlr810]

How fresh is your gas?

What heat range is your plug?

Is the choke operable? 45 pilot may be too small for starting.

How much compression are you getting?

[NOS455]

It is the stock plug and the carb. is new and I have not ran a comp. test because the piston. rings. and sleave are new .. and the gas is good I hope I just got it from the sta. I'll ck the comp. just to be safe from what I've seen I should have had the head milled I seen somewhere that helps starting .. ?

[xlr810]

How does it idle when warmed up? A fast idle requires a fast kick.

Compression: By shaving the head you will raise compression. This will give snappier power throughout the rpm range. As your cylinder breaks in it will also raise compression to a point. Too low compression will make starting difficult, but a high compression sometimes "blows" the spark flame out. If compression is high, try narrowing the plug gap down to about 0.018".

Keep a handful of spark plugs available. They are easily fouled by 2 strokes when they aren't dialed in. You have a 20 year old ignition system... might not spark as strongly as it once did. Might go up a heat range to make it start more easily and resist fouling... (if you were running B9ES before, then try B8ES)

[250exkid]

i would just make sure your choke operates fine.