KimB

Hi Everyone, Okay so I think I had a look at it yesterday, I did the oil in the bore thing it wouldnt start but did have much more compression, I then managed to fire it with a spray of easy start once up and running it was same as before, revs fluctuating quite allot, it seemed to get worse the warmer it got. If I then put the choke on the revs would drop down around tickover. I also checked for air leaks and totaly stripped the carb again to make sure all of the seals and everything else was fine, which it was. Once it was warm I could start it fine but as soon as it was cold it wouldnt start. ? Thanks Kim

Unfortunatly not, Checked twice. Thanks

Good idea ! I will have a look Thanks

Hi thanks for the input, The bike does tick over low but idles high and goes low, I know i wouldnt have put it in backwards as that was something i was always taught Thanks Kim

I did laugh. Hopefully I can , I've certainly been putting it off ! Thanks for the welcome

Thanks for the welcome

Uhh, Thanks for explaining that. Will give it a go tomorow thanks for your help

Thanks for the detailed reply. Hi yes I put everythig back how it was, The previous owner tried to do a rebuild but bodged it and used silicone instead of replacing the gaskets . So put all new top end gaskets on. I forgot to add its a 2005 so carbed model with 8000 miles I didnt check the piston or ring gap, wish i did do it now ! The spark wasn't too bad. But i will remind myself late/tomoro. Sorry if im being silly but i didn't understand these two bits of what you said : in gear and rock the bike does it. The bore could be washed out with fuel and there is not enough compression for the bike to start. It takes a faulty plug out of the equation. Thanks again Kim

Hello everybody, Im Kim from hertfordshire, I've not long bought a Ybr 125, seems a nice little bike. Other than the issues im sorting out. I have a full bike licence, I did it when i was 20 just before they changed the rules, I just need to wait my last couple months before its derestriced. Not long now ! I'm a mechanical engineer, and have spent a few years racing and riding motocross but having a little break now. Nice to meet you all Kim

Oh really, I didn't know Sorry. Yes I did.

Hi everyone, I bought a YBR as a non runner, I had to do a top end rebuild on it, everything seemed fine and went well. It does start but only with easy start ? When it does start the revs seem to sit quite high ? Any ideas what it may be ? I have adjusted the valves as well so it isnt that. Any thoughts would be great to hear. Thanks Kim