Yz 125 - Kick Starting

[Madmanadam]

Hey all,
I recently brought a second hand Yz125 (hasnt been thrashed) and in reasonably good condition, before i start riding i can pull the choke on and kick start it in 1 kick, after letting it rev a little and idle for a bit i take off the choke and ride, If after ive been riding for a while i stall or i turn off the bike, it is really quite hard to start it again!
Does anyone know why? It is a reasonably new spark plug and if it makes any difference i am mixing 40:1.
And I thought it could have something to do with the choke, so just to confirm, pulling the choke lever thing UP is ON correct? and down is off?

Cheers.

 

[Madmanadam]

i am using unleaded 91 because there is a sticker by my petrol tank that says unleaded only.

 

[BigRedAF]

I'm assuming that your choke is a black knob on a brass colored plunger not a metal lever on a pivot that raises a brass colored plunger. Either way if the brass colored plunger is being pulled up/out from the carb body the choke is on.

From your description I think your using the choke to start your bike every time?

If that's the case don't use the choke on a warm/hot engine. The choke richens your A/F (air/fuel) ratio for easier cold starting.

When hot and it won't start try holding the throttle WFO to lean out the A/F ratio so it will light off.

Let us know...

 

[warrior91]

Hot bikes start hard.

 

[IndyMX]

Hot bikes start hard.

Poorly tuned hot bikes are hard to start.

 

[Madmanadam]

Thanks all, Ive got it all figured out, just needs a bit of throttle when I start it, bike's great.

 

[yz125MArider]

she needed a little quice to keep kicken lol. What year is it im just woundering. I just picked up a 00' yz125 and cant wait to go riding.

 

[jdon88]

I think all bikes have their little quirks. After my Yamaha is warmed up from riding for a while then stop for 15 minutes or so I have to give it about 1/2 throttle then starts on 1st kick. If I stop for 30 minutes or more then I need to put the choke on and no throttle and it starts on 1st kick. Might have something to do with jetting but thats what works for me.