MOPED ARMY

Point gap is about .016. The timing is adjusted to what the paper work said with the kit. I think it's like 22mm btdc. I never lubed anything in the flywheel. What does that entail? Same with points cam cleaning... thank you!

Thanks Don! I'm going to pre-mix with premium from here on out and go up on the main jet.

It's starts up, idles & runs great until it starts making that awful noise. Hopefully I will see some progress.

That is a must

The points ride on a cam on inside of flywheel just like valves or lifters ride on the cam in a car that must be free of rust and lubed, the pad need to be turned over/ cleaned then oiled

If you don’t service the magneto you will wear out your fiber points follower real quick, the points will close causing retarded timing and loss of spark and you’ll go slower and slower until there’s no spark, Or in extreme cases just sparkless right then and there,

It’s the first thing I ever do to a bike is remove the flywheel and service check everything out, I also inspect what I will say seal and crank end for rus/leakages

This is a puch ignition but all points ignitions are pretty much the same

If you can read my phone finger writings

Thanks everyone for chiming in!

I put 91 gas in it at a 40:1 ratio oil.

I updated from 54 to a 58 main jet.

drove it for about 5 minutes & it's still making that sound at that certain throttle position. I was thinking its pre-detonation because its a knock near the engine. Maybe it's the chain hitting the bike at that certain rpm or something?

Before this I had a phbg & a bigger pipe and it didn't make this noise. (I was even running 87 fuel). Now I switched to the stock carb (14/12 sha) & the pancake exhaust and this is when it started making the knocking noise.

If I can't figure it out I may end up having to replace the bearings and oil the flywheel stuff that was mentioned and go from there. I'm just confused because before it didn't make the noise and after the stock carb & exhaust now it makes it.

I will check all this easy stuff first. Thanks Don! I did notice the other day that my chain rests on a metal piece of my frame but when I put tension on the chain it lifts off of it. Not sure if my mid throttle range could make less tension and cause it to hit? I will also check engine mounts.

Thank you for the info! I never knew about the less than 3/4 sitting on the bike. Thanks again Don, I will work on it this week and let ya know what I find out.

I never replaced bearings when I got the bike, just the crank seals. So worst case scenario it could be a bearing.

I'm hoping for just something clanking like the chain or flywheel. It seriously is after I just barely let off the throttle once the bike is warm. Only happens at a random mid throttle position not at idle or WOT.

I have a guy in my town that has helped me out with timing and misc things. He still thinks it is pre-detonation. He wants to retard the timing even further to see if he can get it to run cooler and not knock.

I do have a small air leak where the sha meets the intake. Waiting on a o-ring and new shim in the mail. I also ordered some 60 range jets just incase I need to upjet futher.

Fingers crossed I figure it out and it will be something easy. Probably not though..... haha

Thanks Don for all the help! I will let you know what I find out.

Clean and gap the points at .014" and then check timing. sixteen thousandths is a little wide.

You shouldn't be pre igniting unless you have the compression real high, but I doubt you could even start it. Try a cooler heat range plug and maybe upjet a bit. You can maybe try messing with thw different slide cutaways too, seems like more of a carb tuning thing than an ignition if it is directly relatwd to a certain throttle position and not an rpm.

I haven't played with tuning sha slide cutaway, I know they can work, but I cant help you there. Im more of a bing guy. Back to the matter at hand, when you say mid throttle is it more pronounced when its loaded up and you're accelerating at half throttle or is it when you're ripping and then back off the throttle while your still up in the revs. You got the type 2 shim/o ring combo? Nice, that should clean up the leak.