The quad is taking a long time to start... (cranking over a long time)
1) Where could I find the specs for checking the valve adjustment?
2) Should I shitch to an Iridium plug? (if they are available...)

Once it runs, it seems to run fine.

 

set both intake and exhaust valves at .004, i wouldn't waste my money on an iridium plug, use a demso plug instead u22fs-u. these are great plugs.

 

My son's Hanma (imported by Sunl) was hard starting. Look to see if there was a adjustment on the choke. There was, but you could only move the cable in or out and not on the cable throw. If I adjusted to close the choke all the way then it would not open all the way. If I adjusted to open all the way it would not close all the way, which made it hard to start. This is how the factory had it, made it real hard to start when cold. I now just use my finger to manually hold the choke all the way closed and it starts right up. Might have to hold it shut for a few seconds. Once it runs on it's own you can use the choke normally, which only takes a few seconds.

 

ghcoe, I had not thought of that, I will check it thanks.

Where can I get a service manual? The one SunL has does not provide any engine diagrams!

 

The only manual that I have found is this forum. But really, the 110cc MIC engine, from what I have found is based on the 70cc, 110cc Honda engines from the 70's. The engines are a direct bolt in for the Honda CT70 and early Honda three wheelers. I believe you should be able to get manuals for these units since they are still popular.