startin when hot

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

Hi all im new to this site been on as a guest for some time.
Any way my little 2001-m1 cg 125 has a starting issue it will start in cold
Or first thing in the morning no problem with less than 2 seconds on the starter
And runs really good for a 125 but when the engine is in full working temp and
I stop for a min with the engine off I try and start it but it seems reluctant
To start it can take up to 10 seconds on the starter.
Is it some type of carbon build up Crying or Very sad

I have done the valves to 0.008 it has new oil. I have changed the exhaust gasket
For a copper compression one when I took the clutch cover off to inspect the clutch
And oil pump when I first got it about 2 months ago. It has a new spark plug in and it looked in good condition colour wise so it’s not lean or rich.

Just don’t get why it is doing this or is it just the character of the bike. Question

Thanks in advance peeps Very Happy

..... · Quote Me Happy Joined: 15 Jan 2005 Karma :

Did you mean 0.08mm on the valve clearances?

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

cb1rocket · World Chat Champion Joined: 30 Jan 2010 Karma :

new spark plug, air filter replaced? Its normally points to the sign of needing the basic service done. Normally a new plug cures this. Try adding a touch of throttle when starting from hot. It does help as the mixture is too rich for a hot engine at closed throttle when starting

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

i put a new spark in not too long ago i will recheck the air filter give it a good clean and re oil it i will try some more throttle next time
thanks Shocked

bennell09 · Renault 5 Driver Joined: 12 May 2011 Karma :

iirc engines run leaner the hotter they get due to technical things i dont/cant be bothered to understand, maybe your running a touch lean then as the bike heats up the mixture becomes more lean thus making it harder to start. the 10seconds on the starter must even out the mixture and allow your bike to start, i had a similar thing on a pit bike a while ago, see what raising the needle/dropping the clip does or if it has any effect atall Thumbs Up

andys675 · World Chat Champion Joined: 08 Feb 2007 Karma :

make sure the plug is right, a DPR8EA-9

P= projected insulator (tip is longer)
9= 0.9mm plug gap

as a DR8EA and DR8ES will fit and work, but the spark is higher up and smaller

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

thanks peeps

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

can't you just use the choke ? :S

mines usually the oppersite and takes full choke to start and nothing after its been ran for a while
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

ill try tonight on way home i hope so because i know that the bike is ment to run leanish (if thats a word) Mr. Green

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

right fookin bike tryed what all have said and still no joy, tryed to start today wen hot and same so tryed kick start and started on second kick WTF Evil or Very Mad

do you think riding the bike with lights on is taking all the power and its not charging the battery but saying that it starts first thing when cold!!!! Shocked

also the air box rubber has been patched up by previous owner could that have something to do with it Neutral

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

yeh they run crap if the airbox rubbers not sealed

only a few quid to replace it
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

yerr

but best to just replace it
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

just had a look only £6 from honda
ta mate
Very Happy

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

if i put in a colder plug do you think it will help because the one in now if for town riding and i do mainly dull carriage ways average speed is 50 / 60 mph Wink

BigGeeking · Scooby Slapper Joined: 07 Jun 2011 Karma :

right have had another look at the plug and it is a 8 gap on the plug not 9 so have got a new one will let you all know how i get on and i have also got a 9 up from 8 on the heat rating so a colder plug as i do a lot of dual carriage ways not much at slow speed or idle i average about 50 - 60 mph over 15 miles so can only do good. lets see how i go
thanks for all the help Very Happy