Yamaha YBR 125 won't start

nelly18 · Two Stroke Sniffer Joined: 16 Oct 2009 Karma :

Briefly, bike has been running smoothly for 8months that i've had it. It packed in and thought i'd stalled it (was in heavy, slow traffic heading uphill). It now won't start. I was foolish in letting the engine oil level get low so i thought that's what the problem might be so topped it up. Plenty petrol, checked all the cables, wires etc for loose ones. Engine just won't turn over. Ran battery down in trying to start it, recharged battery and two days later still no joy.

I'm such a novice and had to fork out £65 to get it towed safely home after pushing it for a couple of miles (uphill Sad

). Any help Please!!

P. · Red Rocket Joined: 14 Feb 2008 Karma :

take out your spark plug, pour some oil down there... you definately want to check it isnt seized.
Can you push the bike at all in gear? like forcing it? just plop in 2nd and try to push it should sound like its sucking in air through spark plug hole.

nelly18 · Two Stroke Sniffer Joined: 16 Oct 2009 Karma :

Cheers, i'll try that.

We did previously check the sparkplug and bought a new one as it looked a bit weatherbeaten. It doesn't seem to give a spark too often, even with the new one in (my partner checked it and said this, like i said, i'm novice!).

Ta for advice, i'll let you know how i get on.

truslack · World Chat Champion Joined: 08 Apr 2007 Karma :

When you say the engine won't turn over, do you mean it won't turn over, or it wont fire?
____________________
Current: Suzuki RG 125 Gamma, Honda H100, Triumph Tiger 800XC, Suzuki SV650 (minitwin)

nelly18 · Two Stroke Sniffer Joined: 16 Oct 2009 Karma :

I probably mean it won't fire.

Confused

P. · Red Rocket Joined: 14 Feb 2008 Karma :

so you can press the starter and its like trying to start but wont actually go VROOOOM?
lol

If so check your fuel lines...if its the carbed model..check the float bowls are getting fuel, if they are check the jets.. if they arent getting guel it could be a blockage in the fuel line or fuel tap could be off Razz

or on main tank and only have enough for reserve

TUG · World Chat Champion Joined: 12 May 2007 Karma :

I think you should book it in to a dealer or mechanic or have a family member who knows how to use spanners to look at it, if you have let it starve from oil then the piston and barrel will be heavily scored and you'll be losing alot of compression meaning you won't get it to start.

When was it last serviced? Whats to say your plug hasn't died on you?
____________________
Haz ER-5, innit!

P. · Red Rocket Joined: 14 Feb 2008 Karma :

TUG · World Chat Champion Joined: 12 May 2007 Karma :

truslack · World Chat Champion Joined: 08 Apr 2007 Karma :

DazHornet · Nitrous Nuisance Joined: 24 Sep 2009 Karma :

personally i would (if carb) drain the float chamber of petrol, this will basically pull all the shit out with it. make sure theres fuel in it (silly i know but alot of people do not realise that fuel evaporates quite fast ha.

if you have already tried a new plug, try replacing the HT leads. if there is still no joy try new coils.

after that im stumped! ha

always remember to try the cheapest option first.

i had pretty much the same problem with my hornet yesterday. was turning over but there just wasnt a VROOOOMMM!

i just went out got 4 new plugs. wacked um in and first time on the button i had life Very Happy