First time builder here. I have a PK-80. It comes stock with 70 or 72 jet. (I've been told both.) Needle clip was at 2nd from top on a 5 position needle. I put a 68 in and had better results trying to get it started, but it was not quite right. I put 65 jet in thinking I was on my way in the right direction but it got worse. With the original jet it would start and run for a few seconds only with the choke closed. With the 68 jet it would run better and longer with the choke open. With the 65 jet it would not run with the choke open but only with it closed just like the 70 jet. This makes no sense in my book. Why would the 70 and the 65 run with the choke closed and the 68 with the choke open? I could see the 70 and the 68, or the 68 and the 65 running the same way, but why would the one in the middle run differently than the other two? I then changed the clip to the center and I got a really good run out of it (comparatively ... were talking like...12 seconds instead of 3) but then I couldn't get it to run anymore. Also I have another problem which may or may not be related ...
I have a sickbikeparts shiftkit. I don't know if that matters but I'm letting you know. Sometimes I can't get the cranks to go more than halfway around. It seems to bind up and I don't have enough strength to push past the pedals being one up and one down. I've noticed that I could nudge the bike backwards with the clutch lever out and when I did this it would free up whatever was stuck and then I could pedal normally again. But after awhile this was not working very well anymore. What could be causing this?
I have a sickbikeparts shiftkit. I don't know if that matters but I'm letting you know. Sometimes I can't get the cranks to go more than halfway around. It seems to bind up and I don't have enough strength to push past the pedals being one up and one down. I've noticed that I could nudge the bike backwards with the clutch lever out and when I did this it would free up whatever was stuck and then I could pedal normally again. But after awhile this was not working very well anymore. What could be causing this?