MOPED ARMY

Can you get the jets for that carb? its the bing that comes with the 505/1d

What parts did you swap?

Do you know how to set timing?

What carb are you using?

what pipe do you have on it?

What muffler do you have on it?

What is your gearing?

Did you or someone you know tie a boat anchor to the moped while you weren't looking?

What air filter do you have?

Are your brakes dragging?

On the flywheel there are 2 marks, one is the top dead center mark the other is the ignition fire mark.

There is a mark on the engine case where the TDC mark lines up when the piston is at top dead center. You swapped the flywheel so it's going to be in a slightly different place than it was before, so you might need to make a new mark.

Spin the flywheel in the direction of the arrow and you points should just start to open up right as the ignition mark passes the TDC mark on the engine case.

Adjust it by any way you can- move the strator, move the points, bend the points, whatever.

As for Jetting- you probably have a 58 in there. Once you have it running use a new plug and see if you are running rich or lean, and adjust it. Use a filter, make an airbox, Etc.

where would there be a restriction? im running an open air box and a biturbo.

i lied. i ripped it today and it goes 32 on a flat, 25 uphill, and 38 down hill. Did anyone have any luck eliminating the jug gasket on these?

i weigh 145

On a lot of sachs's the gearing is 11 on the front, and 44 to 48 in the back.

What kind of compression are you getting, and have you gotten the timing set right yet?

so today i cranked the stator plate as far as it would go one way and tested it as i moved it back until it felt best. timing is not the issue. what causes four stroking because it sometimes will do that at wide open throttle but not always. im wondering if i should get a stock filter on there or maybe somehow up jet. i feel like its a carburation issue but i dont really know how to troubleshoot this type of problem.

DOWN JET!

If it is four stroking could i mill a bit out of my carb opening to allow more air?

i used the whole d motor and a stator from the a motor i took off. the crank is from a g3 with a d motor. the biturbo is a sachs header welded to the biturbo expansion chanber then theres the biturbo muffler. its that 2 pieced deal that 1977 sells. i really appreciate the help.

I'm having the same problem with my 5051d. I flipped the intake and put a 16mm dellorto with a uni pod on there. I'm currently running a 60 jet. Plug shops seemed OK but it only does 29mph and spits up fuel soaking the filter. I also have the tomos bullet and Sachs header (larger then the bullet). What fuel ratio are you running? I also did a lot of porting. My 504 foxi has better top end very disappointing.

I used richer gas and the four stroking stopped. im assuming that its because the gas is thicker and its acting as if the jet were smaller. but im still at 32-33 mph.

Your four-stroking went away because by adding more oil to your gas you are actually leaning out your mix.