kick it , and hard

[OZ FMX]

latley my bike has been a real beatch to start its a 94' CR 250, it started happening about a month ago so that would be like 2-3 rides for me any way i can kick this thing till the cows come home but its only when i try to clutch it it runs, i've replaced the plug checked all the wireing ect.... and cant find a problem i'm running it at 32:1, stock jetting/idle and so on, every thing on it is fine it just wont start, bloody hell this has got me stumped

[-=DV=-]

nah thats just a typical POS honda....lol...j/k bro....i used to have a similar prob with my old old old old cr...back when i was on 80s...91 cr 80...anyway i could kick it for ever...it turned out to be a dead CDI

[crustyfmx250]

he said he checked the wiring.

whats the plug look like after youve kicked it over a few times? that can tell you if its a lack of, or too much fuel.

tried pushstarting?

and does it have a strong spark?

[-=DV=-]

the wiring and the CDI are 2 totally diff things man...it cost me alot of money b4 i got mine sorted out...replaced everything in the whole electrical system after being told that CDIs dont break down...it only came clean after i got a new CDI...theres proof they do break down...lol

[LWilson250]

You guys are overlooking the painfully obvious lol. COMPRESSION. When was your last top end? When you have low compression no matter how much you kick the bike almost never starts.

Low compression is caused by worn piston rings, they are no longer able to make a strong enough seal with the cylinder wall and because of that you get what’s called "blow by".

Blow by is where your cylinder cannot hold the pressure in the combustion chamber and the fuel/air mixture leaks back down into the crankcase through the piston rings.

If you have a compression tester you can check and see what your bike is at. It's a gauge with a hose on it that threads into the spark plug hole, then you simply kick a few times and read the compression.

Now, if you are on a new top end... Well then you got problems. So lets say you have good compression, what next? Are your jets clogged up? Take off your float bowl and blow compressed air through the jets and see if they are all clogged up. Never stick wire or anything like it into the jets, they are made of a very soft metal and will deform, thus ruining your jet and messing up your jetting.

Lee W.

[OZ FMX]

thanx guys, its got plenty of compression, whole engine was rebuilt about 3 months ago i also got my neighbour to check the CDI and it was was fine so i'm gonna take it to a bike shop let them sort it out

[MIKEY B]

try mixing your gas at 40:1
my 2001 rm 125 used to bog then die at 32:1, so i switched to 40:1.

or try using a hotter spark plug...

exe.(NGK) instead of B9ES try B8ES.

[OZ FMX]

might try that, good thinking 99

[LWilson250]

It might also be a good idea to run a resistor type plug like a BR8EV.

Lee W.

[^God^Air^]

Kick kick and it wont start?

Well hopefully you dont have a crack or blown seal in your crank case.. causing it to have no suction or abitlity to spray fuel up to the top end.. it will still have good compression up top but not in the case..
Most likely thats not the problem..

You say when you pull in the clutch... the bike will start.. that sounds like there could be somthing in the clutch or tranny that is dragging.. and making it very difficult to get the bike to start.. Im not big on clutches and trannies.. but it seems odd that it would make it start better..
I hope your in neutral when you try to start the bike.. lol
poor a little bit of fuel in the spark plug hole and then try to start it, if it runs for a few secs than quits.. than you have a fuel problem, where as you arent getting any to the engine.
if it still doesnt start if you put fuel in the plug hole and the plug looks wet when you take it out after trying to start it.. than your either getting too much fuel or the plug is fouled.. or there is some kind of an electrical problem..
maybe hopefully i mentioned somthing that you might not have tried or thought of that will help you out.

[ont.freerider]

yeah the clutch being pulled out is kinda odd, but it makes sense, the clutch acts sortof like a load on the engine, it has to turn the clutch as well as the piston etc. if the clutch is disengadged (lever pulled in) then it takes the load off the motor. watch wat the bike shop charges you for! man i hate those places! thats why i thank the lord im mechanically inclined! hehe :)

[OZ FMX]

i've got a few mates who are bike mech's so i can get it done for next to nothing, the only reason i'm taking it there is this has got me stuffed

[ont.freerider]

i hear ya bro!

[fastkx125]

yeh. i used to have br9eg in my kx and it always used to foul it up so i put in one of my friends plugs off his rm. a b8es and it had heaps more power and the plug has been in there for ages and never ###ked up.