EugenM

Hello from Romania! Can't believe this topic is from 2009 .... didn't see it till now. I don't own a quad till now... just love to fix them 😁 and fund a lot of help here, great people here from allover the world 🌎🌍.

I'm glad I could help!😉😉 Sorry for blurry video... camera was dirty! VID-20230422-WA0005.mp4

If I don't find anything...and the engine is running great...try to ad some wings....if is flying the wheel is not gonna bother you,, ,🤪

Mech I thought the same thing, but if you search on the internet you find countless pictures of this type of cylinder head and doesn't seem to be anything missing from there https://www.motorkit.com/en/spare-parts-yx125-140cc-/23933-cylinder-head-for-yx-and-lifan-engines-125cc-with-27-and-23mm-valve.html

I've never seen anything like this before either, but I don't see that mechanism having any other role than to prevent the camshaft from rotating in the opposite direction...this is to prevent the timing from shifting...

https://pitbike.pt/en/engines/1290-lifan-125cc-manual-clutch-n1234-kickstarter-e-starter-3701225415453.html And I believe this is the engine...or a clone

I didn't see something like this...I believe is something to prevent the camshaft from rotating in the opposite direction... with the one way bearing...or something is missing from there to be a decomposition mecanism

can you post a picture of the carburetor? Does it have an automatic or mechanical choke?

Probably will help this

Hi, Sorry for asking (I'm struggling to understand some of your expressions, unfortunately I didn't learn english in school). What do you mean when you say that is turn over only when you put your hand over intake...is it starting only that way? Or is not starting at all?

Is the electrical installation accessible now? or do you have to fit other parts to gain access? did you see on my grizzly post I found somewhere under the tank 4 cables that were broken.....(I have never had a Big Bear before and I don't know how different it is from a grizzly) you can search...or are there more the possibility of a main contact being oxidized...and when you measure with a multimeter you have continuity and power, but when you check with a light bulb it doesn't light up because of oxide

For sure something minor.... No power... it's easy...start from battery and follow the power

Good luck with that! I'm sure it will be a good job in the end!

I'm happy for you Gwbarm! I'm glad that we managed to find out the problem! Cheers!

speaking of old age Mech..a grandfather was talking to his grandson and said to him...do you know when you realize you're old? ... When you see a pair of beautiful boobs and you are only thinking that you forgot to buy milk for breakfast!🤪