MOPED ARMY

Forgot to mention that it has not been port matched or ported in anyway......yet. It does do 46 without the wind in my face though :D

Plug chop says I am close. A little rich with one layer of stocking, dead on with open carb. Could be spark related when hot. So the coils will react with engine temp? I can see how the condenser would, but the coils are about two feet from the head. I suppose they could heat up from use alone though. This problem is new since kitting though. I will check the points. I am on the smallest jet I have (besides the stocker) and on the leanest needle setting. I plan on boring the BING to 15mm but have yet to make it to the machine shop so I have larger jetting. If I lean it out with the oil it would put me closer to my optimum and would be the recommended for break it. BUT if its not a good idea I wont bother.

If there is an air leak but my plug chop is coming up fine I don't understand how that would cause the problem. Not saying that its not an air leak just that I don't understand.

You bring up good points and I will follow your advise thank you schijnheilig!

I have to put it all back together now....

condensor is your problem/

Update*

I hate my life!

So its seems to still get a good blue spark (with different plug) when it doesn't want to start. Also it seems its not entirely unstartable, just super duper hard to get to fire....... maybe.

BUT! I can't work on it any longer because my clutch cable broke/came off so yeah........F'ing fantastic!

Sounds like you just needed new rings to me. I suppose the piston could have warped. Sorry to hear about your misfortune. Out of curiosity did you ever try the new piston and rings in the old jug? I know its taboo to do so because of the rings sealing and all but I would be curious if it ran well. If you have a caliper you could check to see if the cylinder or the piston is out of round. Do you still have the old kit though?

I really haven't ran mine above 35 save for a few quick spurts and I have not seized it. It doesn't get nearly hot enough to melt my spark plug boot either. It also turns over easily by hand. I am going to change plugs and re-gap slightly smaller to see if that helps. First I have to fix the clutch cable though.

Also I am going to let it warm up and pull the plug (I put a nice coat of anti-seize on it) and see how freely it turns over. If it did overheat and warp the piston I can have it trued when I visit the machine shop. Worst case scenario there is new rings I would think.

Hmm, I didn't try new rings or the new piston. The piston and cylinder walls had some gouges.

Pretty stupid on my part, but it was hard to resist the temptation to hit the powerband :D

How's your idle? Maybe you're just running too lean with the throttle closed because of an airleak, or because there's no idle mix adjustment on the bing? I somehow ended up with an airleak at the clamp on both the bing, and the SHA carbs.

When I let off the throttle from 1/8 to idle, it would take a while for the RPM to drop.

you say won't start until it cools, how long does this take

Ok so here is the update.

Fixed my clutch cable

Found a slight air leak in the clamp connection at the carb

Runs rich now so........

Hopefully will have the carb bored by the end of the night (my machinest wont be in the shop until 7ish)

Then my jetting shouldn't be an issue.

My gap was at .025 so a little large so I closed it to .020

A bad condenser will still throw a spark. Umm, it starts when it cools down. Change it. And when you can shut it off , because you choose to, and then when you want it to start right away again, and it works, you will be glad it was so simple.

Update*

Ok so I replaced the condenser and still no go.

I have also since added a 70cc high comp head, fixed all air leaks, port matched everything, up-jetted and plug chopped to perfection, running a b7hs plug now instead of a b6hs, and re-gapped the points a few times.

So..... I am starting to get pissed off. hours of tunning and mucking with stuff has gotten me almost no where. Except now she runs like a mofo up to 46 ish.

Also whats frustrating is that I am constantly breaking down in front of on lookers and usually teenagers. I don't even try and start it back up anymore I just peddle home.

Also what might be of some concern is the fact that when the engine rev's out the points are arcing onto surrounding areas. Actually its more like the points arm is arcing onto the stator plate. I tried to clean the points and surrounding areas but I don't think it did any good.