E50 bad takeoff

E50

Treats 50cc with o ring head

Tecno circuit

15mm Bing w/82 jet, needle clip second from top

Blue springs on the clutch, at 25lbs using the fishscale method.

From takeoff bike starts pulling, then it bogs out and doesn't really rev at all then it starts accelerating again. It's like there is a dead spot in the powerband

It feels the same as if your clutch springs are wayyy too tight and the bike doesn't really go anywhere. Tuning seems pretty good otherwise, if not a little rich

So clutch or carb tuning?

Re: E50 bad takeoff

What's the timing set to?

Re: E50 bad takeoff

* wormdirt * /

> Mike Boyd Wrote:

> -------------------------------------------------------

> What's the timing set to?

16° which is max without taking a Dremel to it, gap is at .018" I believe.

Re: E50 bad takeoff

That is pretty tight clutch springs for a 50cc setup. I’d try 15lb and reassess

Re: E50 bad takeoff

mess w the needle height, its guessing its one way or the other. move it up, lean bog, if u have a sticky choke, choke it half way to enrichen the mix for a second and gun it, if it takes off youll know its lean.

Re: E50 bad takeoff

16 is way too retarded, try bumping it up and see what it does.

those 50cc puch kits suck, they are way overported for single speed. you're better off with a ported stock cylinder.

when your clutch is slipping your just turning horsepower into heat, if you don't have enough torque to dig out of that hole you wont go anywhere.

you didn't say what your gearing is but i usually run those 14x45 and let them scream, you'll be surprised how hard they will rev out with that circuit pipe. 14x43 is usually where you get your top speed.

Re: E50 bad takeoff

* wormdirt * /

> Graham Motzing Wrote:

> -------------------------------------------------------

> 16 is way too retarded, try bumping it up and see what it does.

>

> those 50cc puch kits suck, they are way overported for single speed.

> you're better off with a ported stock cylinder.

>

> when your clutch is slipping your just turning horsepower into heat, if

> you don't have enough torque to dig out of that hole you wont go

> anywhere.

>

> you didn't say what your gearing is but i usually run those 14x45 and

> let them scream, you'll be surprised how hard they will rev out with

> that circuit pipe. 14x43 is usually where you get your top speed.

Running 16x45 currently. I have a 15 front I've been sitting on that I'll try out. I'll bump the timing a smidge as well.

Top speed is pretty dogshit as well, maybe pushing upper 20s.

I was hitting a wall with tuning, after the enormous effort just to get this thing running.

Re: E50 bad takeoff

* wormdirt * /

> pat splat Wrote:

> -------------------------------------------------------

> mess w the needle height, its guessing its one way or the other. move it

> up, lean bog, if u have a sticky choke, choke it half way to enrichen

> the mix for a second and gun it, if it takes off youll know its lean.

If anything its running lean, idle screw is pretty far out still.

Re: E50 bad takeoff

woah my bad i didn't even read your post that carefully

82 is crazy huge, you should be like high 60's low 70's max. i'd try a 66, 68.

if its really that lean you probably have an air leak somewhere.

don't fuck with your timing until you have it running ok ish, 16 timng is good enough for getting it tuned in, but you'll want more advance to see full potential.

16x45 gears is good to get it broken in and tuned, i usually break in with taller gears and gear down depending on how the bike runs.

Re: E50 bad takeoff

* wormdirt * /

> Graham Motzing Wrote:

> -------------------------------------------------------

> woah my bad i didn't even read your post that carefully

>

> 82 is crazy huge, you should be like high 60's low 70's max. i'd try a

> 66, 68.

>

> if its really that lean you probably have an air leak somewhere.

>

> don't fuck with your timing until you have it running ok ish, 16 timng

> is good enough for getting it tuned in, but you'll want more advance to

> see full potential.

>

> 16x45 gears is good to get it broken in and tuned, i usually break in

> with taller gears and gear down depending on how the bike runs.

Really? Roff and some other folks recommended 78-80 range for the kit and bike. As far as air leaks, I've sprayed it w/ carb cleaner, run and o ring in the carb and tap it while tightened to get it to squish, it has new gaskets as of last weekend which didn't change anything. New studs with flange nuts.

The only thing I can think of is a hairline crack on the carb where the intake goes in from the previous owner tightening the shit out of it.

Hmm I'll check it out though

Re: E50 bad takeoff

Probably Fred /

> Wesley Ambrosini Wrote:

> -------------------------------------------------------

> >

>

> > -------------------------------------------------------

>

> >

>

> The only thing I can think of is a hairline crack on the carb where the

> intake goes in from the previous owner

throw carb away

Re: E50 bad takeoff

* wormdirt * /

It's a non issue. Excessive cleaner spraying yields no changes.

Re: E50 bad takeoff

Probably Fred /

> Wesley Ambrosini Wrote:

> -------------------------------------------------------

> It's a non issue. Excessive cleaner spraying yields no changes.

How do you spray when you’re riding it

Re: E50 bad takeoff

* wormdirt * /

Good point I guess. I JB weld "patched" the crack just for shits n giggles anyway

Cranked on the intake studs a little

Dropped the jet to 72

Takeoff is better but the mid-range is definitely lean as hell a lot of hesitation.

Re: E50 bad takeoff

Don't forget to replace that spark plug. Often overlooked. I'd also clean and set points at .014" if they aren't new.

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