poor spark on a 87 250r any help

[chrs]

Ok we have done a bunch of wool on this thing bold runs great cold but when it warms up looses spark after about 5 min any body have any help for me

[chrs]

Ok sorry about spelling on my phone doin this but we have dumped over $800 to make this bike go and not having any luck yet so hoping someone has had same problem and knows how to fix it

[Chazz of Blades]

Wait, what?


What year is it really?

What have you done to it?

[chrs]

Ok it is a 87 my brother bought it last year bike is board 40 over has fmf gold we replaced coil plug tried different stator cleaned gas tank rebuilt Carb

[chrs]

Bike warms up tried choking when it starts running rough doesn't change when warm pulled plug grounded out on motor spark is yellowish and poor

[chrs]

Leaning towards stator or cdi the stator we tried was brand new but pickup was bad on it

[Vealmonkey]

Check ground and clean. Check connections to your on/off switch and clean all connections. Make sure you have the right plug. Check static timing. Is your coil an old coil or a new coil? Kick harder and faster! LOL.

[chrs]

Kicks hard but will backfire when warm its 40 over should kick hard but bike was taken all apart and had new gaskets done on jug bike did run like crap before hand to

[chrs]

There shouldn't be any timing on there that can be screwed with could there thought stator just bolted on in one spot couldn't be moved around

[Chazz of Blades]

AAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHhhhhhhhhhhhhhhhhhhh hh. Ok.


TRX! Alrighty then, had me thrown for a bit of a loop, it's too late to do that to a poor old geezer like me.


Liiiiiiiiiisteeeenn tooooo Veeeeeaaaaal, he knows what he be doing the saying of the things or the nature of the thing in which the manner of you spake.

[chrs]

Ok bit we have gone all over all of the bike jets are set for the bigger jug what's the chances of a cdi being problem runs great cold that takes,me away from the kill switch and some of the electrical

[just ben]

normally when a cdi goes bad it just doesnt work or is affected by vibration. I dont know where they are mounted on an R but if its close to a heat source I suppose it ciuld affect it. but I have never really heard of on any machine

[tri again]

old trick is to heat suspect components with a
hairdryer one at a time when you KNOW it should run,
like before the whole machine warms up.

Compressed air can also cool components enough to duplicate
heat/cold related failures.