Air leak?

[GW's Motorized]

But we DO help people by telling them how to do it Gordy...lol...Have you been sleeping in class again when I help people tune their NT's and BoFengs???...lol.

I'm talking about this specific carb that we don't have experience with

 

[Chainlube]

I'm talking about this specific carb that we don't have experience with

We all have experience with that carb, it's a ee HP.

 

[GW's Motorized]

We all have experience with that carb, it's a ee HP.

Today i mounted a new carby on my engine, a delorto sha clone from aliexpress.

This is what I read

 

[Chainlube]

This is what I read

That's what they are. Except the ali one is a knockoff and not good at all. A real one is hard enough to tune without any air leaks. No one wants to put a $120 carb on an MB.

 

[Andrew1234]

That's what they are. Except the ali one is a knockoff and not good at all. A real one is hard enough to tune without any air leaks. No one wants to put a $120 carb on an MB.

where do you get the real one?

 

[LunchMoney]

I diched the NT carbs after a second one was leaking fuel everywhere, no fuel valve needles to buy

 

[DAMIEN1307]

I diched the NT carbs after a second one was leaking fuel everywhere, no fuel valve needles to buy

Your not the first with leaking NT carb, I replaced mine with the JRL BoFeng carburetor...Looks alot like a NT but built much better, plus it also has a fuel emulsifier tube in it as well...Smooth response through all throttle ranges.

I got mine from Amazon here in the US, although most kit motors here in the US are now also using the BoFengs with the new models...I do not know if they are available in Lithuania or not though.

https://www.amazon.com/JRL-Carburetor-Stroke-Motorized-Bicycle/dp/B08N9WYS1V

 

[francisjohn]

Today i mounted a new carby on my engine, a delorto sha clone from aliexpress. It ran very rich from the start but i thought i could warm it up a little and it could lean out. Was 4 stroking for like 25 minutes but ran good when climbing hills. Got it nice and hot and it was perfect. Decides to stop for a bit and noticed when i pull in the clutch, the idle slowly comes down and the engine dies. Okay, i needed to get gome somehow. So, back on the road. It 4 stroked for like 5 minutes and started to run amazing. Saw a straight road and decided to test the max speed. Got to about 50km/ph and suddenly the engine started to stop on it's own.
Is it an air leak? I know it is definitely not near the intake. Can air leak to the engine thru the exhaust connection?

Few things.

1. Four stroking is normal when cruising or accelerating.
2. On speed runs, I as well have WOT and the idle lowers drastically thus killing the engine.
3. If there is a bad exhaust gasket, it isn't necessary an air leak like you would have with a bad crank seal. You will have a higher idle though which is normal. Most important, technically this would lean it out. Just as cutting a 1/2" hole or removing the exhaust cap.

I would take into consideration, if everything was fine before but introducing a carb caused problems, exploring that vicinity.

 

[francisjohn]

I diched the NT carbs after a second one was leaking fuel everywhere, no fuel valve needles to buy

I love PZ carbs. The 48mm mount is superior. The intake and carb design is absolutely horrible.

 

[LunchMoney]

Few things.

1. Four stroking is normal when cruising or accelerating.
2. On speed runs, I as well have WOT and the idle lowers drastically thus killing the engine.
3. If there is a bad exhaust gasket, it isn't necessary an air leak like you would have with a bad crank seal. You will have a higher idle though which is normal. Most important, technically this would lean it out. Just as cutting a 1/2" hole or removing the exhaust cap.

I would take into consideration, if everything was fine before but introducing a carb caused problems, exploring that vicinity.

No, everything was terrible actually, insane fuel leaks and a screaming idle was not a great experience i had before, i am just happy i can brap again :') So, anything that can be done? Or is there nothing to worry?