MOPED ARMY

Norm 2 speed or 1, what year maxi is it , how is the gas flow ,? if its an old maxi ,hows the tank ? clean or full of shit ? if its an old ped the shit hides down the bottom of the tank that puch calls the reserve tank and tho the gas seems to flow clear that shit gets into everything as you jolt and bownce it around make sure the tank and carb are clean clean clean

Sorry , should have put in more info. So it was originally a'78 2 speed maxi mkII, but the 2speed transmission was hosed, so I switched in a whole new 1speed transmission and aftermarket 50cc topend, kept my old stator and flywheel to make the wiring easier.

The tank is sparkling, I spent a week degreasing, derusting, and por-15ing the bastard so gas flows crystal clear. The carb is rebuilit 14mm bing with all new gaskets, needle, jet, float, etc... Clutch is good, new points and condensor. Far as I know this thing should work. The topend is a 50cc aftermarket kit , and I do have a techno boss pipe, but i kept on the old exhaust and #54 jet that ran with the 2hp 2speed engine. I realize I need to tweak and rejet since it's now a 1speed engine (but with the kit and the high torque head, still 2hp?) but still doesn't explain why my lowend pull is so pathetic, even after switching the front sprocket from 18T to 14T. I guess I could put it back but I don't think that's the problem and would probably only make it worse.

Again, when i did slap on the techno boss and up jetted to #60, i could move up to 20mph, but take off still required pedaling, but with the stock airbox and pipe this thing can't get up to 5mph and bogs down at full throttle.

Even if it were jetting issues I still can't see it explaining why I can't get this thing to pull me off the line itself withough pedal help, I'm a big guy (200+) but I shouldn't be able to bog the engine by pressing down on the seat with one hand.

A 54 is not enough 64 is more like it, airleak somewhere?

if your plug is oily and wet its too rich. it should be tan colored.

wow, "make sure your piston is facing the wrong way" sorry I meant facing the right way obviously, my bad.

That one speed clutch is a real weak sister ,when you hold it back by pushing down on the back tire does it rev up or bog down like it wants to move but cant Peaceup Dan

bogs , doesn't rev, no offense taken on the weight, I know i'm big for a one speed, expecting to need some help getting off the line, but still doesn't explain the piss poor top speed. Plus I thought dropping from a 18T to 14T front sprocket would make up for it a little.

Going to the carb spray test this afternoon, see if I'm leaking anywhere. Piston is installed right so isn't that.

God i want my 2speed back.

Try Just taking the tube off the back of the airbox

you have way to many variables,

you need to put together the bike, as you want it, with one pipe, and one carb, all this switching around of carbs/jets/pipes/gearing is sort of like hearding cats

put the techno boss on there, make sure you have a good seal with the exhuast gasket, you can put your hand under there when the bikes runnings, and feel for an air leak, you should have none

test for compression to make sure you have no head/jug leaks, make sure all the top end gaskets are secure, i dont know what that kit should run, but probably somewhere around 150, at the least, i would imagine, anythying less than 120-130 could explain somethings

do you have a stock airboox? put that on to break in the kit, then get a bunch of jets, from low 60's to mid 70's, if not higher, and start with the largest and work your way down untill you have good throttle response, no bogging or four stroking or anything, you should be abble to open the throttle without any ill results

make sure your points are opened to .018, and your timing is set at least remotely right

keep your oil to gas ratio consistent, something like 40:1 for the kit, whats your ratio now?

if your plugs are looking oily and dark,, it could be because the needle setting is the richest, this effects the idle, and coiuld cause your plugs, although potentially looking lean at full throttle, to darken down at idle

i think a large part of your problem is jetting, 50 size jets seem way to small, and you could also have an air leak somewhere,

i would stop messing around with things that wont really solve the problem, tires and sprockets arent the problem

however i would break in a new kit with a top end gear combo, something like 16x40 or 42 minimum, that way you minimize friction in the top end,

the pipe shouldnt be that loud, are you 100% positive you dont have an air leak around the exhuast header?

That tells all, the engine isn't getting enough back pressure (echo) from the unrestricted exhaust pipe my feeling is. whereabouts you live Norm.

you should go see Fred or Joe the Ho, they could help you out

I have a puch maxi luxe with the 1 speed 2hp engine with a stock pipe stock carb and stock motor i have a #66 jet if this will help you basically the same motor setup as you but on a maxi frame