86 125M hard start issue

[afdfirefighter]

Have a very nice 86 125m and ever since I got it, it has been hard starting. First thing I did was rebuild the carb and it started like a charm. Couple days later it would not start unless I used starting fluid. I got a carb on eBay and slapped on it and it started like a charm again. Two days later, well you get the story. What could be the issue? Where should I start?

[gimmeamidget]

Sounds like carb adjustments. Is it smoking or fouling plugs at all and how is the compression? If not burning oil and compression is good I would say you need to adjust carb or jetting size on your pilot.

[afdfirefighter]

What would cause it to start great when the carb is put on and then start doing that? That doesn't make sense...

[Jd110]

what does the inside of the tank look like? Is there rust?

[afdfirefighter]

Nope its clean. Carb is always clean when I pull it too.

[Trike_crazy]

Clean carb, check petcock filter and check valve adjustments. Mine had a hard starting issue and when I checked the valves the intake valve was too tight. Worth a shot and its free

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[afdfirefighter]

I'm still trying to figure out why it will start easily after the carb clean or new carb then it won't. I don't think the valves would be doing that. I will give them a peak but I may add an inline filter on the fuel line to see what that does.

[Trike_crazy]

Only other thing I've had happen is the fuel cap not venting and pulling a vacuum after running for a bit. Thats the only other think of.

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