engine

alright so my mate wants to swap my yx140 big bore out of my nitrous for his zongshen 150 ? is it a good swap should i do it whats the differences? and which one is generally the better motor ? thanks guys :)

Hey all, Today I bought a Dirtmax Dominator +r. 160cc It cost $2995 new but I got it second hand with about 5 hours on it. It's never seen anything more then a small paddock. This is my first big bore engine and I have two concerns with it: Firstly: The engine is quite loud, not the...

Gday Everyone My mate has a twin spar klx style orion pit bike. Pretty much the same as this link here. http://lh6.ggpht.com/_9B5bhxAaYoc/SnKpwOejMbI/AAAAAAAAA_g/zC07-iF4qUk/s720/140ccOrion29bPitBikeRed.jpg The engine in the bike is a 140cc lifan supposaadly, although couldnt find any...

Hey guys, my friends bike engine is having some issues and I just need a bit of guidance and help so I can help him fix it. cheers Engine: 140cc lifan, air cooled Issue: When you are riding in any gear the bike randomly jumps back into neutral. Im unsure if its more prone to over bumps...

Can i put a V2 head on a stock yx150 ?? will the piston hit the vavles or will it all be ok ? cheers fellas

I need help baddd my engine is a 110cc tianzhong and over night it has shit itself it has lost all power i cant even ride in second gear thats how bad it is, it stalls all the time backfires reaally badd and the exhaust note sounds like a fart and really loud and annoying and it takes 5 min of...