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So I've noticed that the head and engine are getting very very hot after only a few minutes of running. Even though I have changed the oil it has a burnt smell and I've only ran it for approx 20min in total. When I first did the oil change after getting bike it had a lot of sludge visable...

Turns out that the timing chain is broken. This is getting interesting.

After some investigation it turns out my timing chain is off as pictured. Any ideas as to where to go from here?

Thanks motodevo. Is it possible to adjust clutch when bike is not running as it's a semi automatic? If so, how would I go about doing this for this type of engine? Thanks for your time.

So this is where I'm at. Bike has spark but has basically no compression at all. I can easily turn kick starter by hand. Makes no difference if spark plug is in or not. I'm thinking the piston rings are gone or one of the 3 valves are stuck. Can the valves cause lack of compression or just...

Hi all. Just wondering if anyone knows what sort of bike/engine this is? I've never worked on one before. Thanks.

Thanks motodevo. Replaced both and now starts and runs great after a good carb clean.

so this is where I'm up too. The bike has now stopped trying to turn over when I connect the battery. Battery is still fully charged. I have tried crossing the solenoid and the starter very slowly cranks over but nowhere near fast enough to start bike. So I took spark plug out and crossed...

So I tried disconnecting the anti theft and it makes no difference. Checked over wireing again and everything looks ok. I then tried connecting the battery and it tried to turn over engine very very slowly then stopped whilst both the key and ignition switch were in the off position. Turning key...

Thanks. Will it start with the anti theft device attached as I have no remote or anything with bike? Can this be bypassed to see if it starts? Thanks for your time?

Hi all. I have a 110cc Chinese quad bike that I'm having electrical issues with. After removing fender to expose wireing I have noticed it has some sort of anti theft device (see pics) and also has a black wire not connected to anything from what I ussume is part of factory anti theft device...

Will I have to drain oil prior to replacing o ring? Would you know where I could get a workshop manual from?

Thanks so much for your help motodevo

I think I've worked out how to post pic.

How do I post a pic? Sorry I'm new to this site

Hi. I have just posted a reply to this about my wildcat js90y that I'm hoping you can help me out with. Thanks Daniel

Hi all. I have recently come across a jianshe wildcat js90y. After starting I have noticed a small oil leak coming from a bolt that's around a thread on the oil cover plate near the oil filler hole just above the rear brake peddle. I tried tightening bolt but still leaks between the bolt and the...