best exhaust for fast take off

[TheRealDune]

Hey everybody,
its payday and im looking to get an exhaust to get me going quicker. I have a 48T sprock and i am 250 . Dont want to end up buying a pipe that wont help me out , so i thought i would ask the experts here at the forum.

 

[Pluto]

I am no expert but have been reading as much as I can about this hobby. I ended up installing the set up from Sick Bike Parts. Not the cheapest out there but I think it is a quality piece.

The instructions for their pipe says that by shortning the supplied copper piece of the pipe you are able to tune for low end torque or high RPM power. Your choice. I did not test it out as I cut it short, want low end power too. But mainly cause I think it looks better short.

Cheers, David

 

[Kioshk]

I have an X80 with a standard NT Carb, standard muffler, on a 29" motorized bicycle with a 56T. I top out at about 25MPH (cruising), and off-the-line is pretty impressive. If you're looking for good starting acceleration, I suggest a sprock upgrade.

 

[TheRealDune]

I have an X80 with a standard NT Carb, standard muffler, on a 29" motorized bicycle with a 56T. I top out at about 25MPH (cruising), and off-the-line is pretty impressive. If you're looking for good starting acceleration, I suggest a sprock upgrade.

36T would be best for starting accel right? X80 which exhaust would that be? Ty for your help

 

[Kioshk]

Nope, 56T; (typo?). More teeth, more acceleration, less teeth, more speed. X80 is a 66cc kit; comes with a standard catalytic muffler. You might also consider drilling out the muffler innards. I did this on a previous build after it got fouled by too much oil and became constricted. The noise increase was negligible, but the accelleration improved markedly.

 

[maniac57]

Just for information Dune, I'm 250 plus and I run a 36 tooth for lower rpm's and less vibration at cruising speeds. I run a homemade pipe and it pulls my big behind just fine.
The pipe made up for the loss of low end from the gearing.
I will never go back to a 44.
BUT I live in a relatively flat town. If you have hills that slow down a 44, you WILL have to pedal with a 36.

 

[TheRealDune]

Just for information Dune, I'm 250 plus and I run a 36 tooth for lower rpm's and less vibration at cruising speeds. I run a homemade pipe and it pulls my big behind just fine.
The pipe made up for the loss of low end from the gearing.
I will never go back to a 44.
BUT I live in a relatively flat town. If you have hills that slow down a 44, you WILL have to pedal with a 36.

Thanks Maniac your info is greatly appreciated=)

 

[Will122391]

If you want takeoff speed, the bigger the sprocket the better. But since you are going with a 36t, I would get the SBP exhaust and leave it as long as possible. The less you cut, the lower the torque will be. However, the power will still not be that low.

 

[Pablo]

You want torque my man. Bottom end grunt. A pipe can and will help. But we ARE talking about a 66cc 2T engine.

 

[ivan H]

Agreed. Torque is wot ur after, & for a 2 stroke, an expansion chamber will give u by far the best bang for bucks in this regard, no matter if ur motor is stock or wild. SBP have a good one that is easily tuneable & adaptable to practically any installation. U wont regret buying one. Cheers

 

[Pablo]

Gear down, lower the RPM of the power band, maximize torque to the ground. Your MPG will suffer a bit but it's worth it. Raising compression also helps.