Honda Spree performance exhausts?!?

sru1317 · Post by **sru1317** » Fri May 22, 2009 9:45 pm

Where the heck can I find an aftermarket exhaust for my '85 spree??

If they don't make them anymore....is there a 2-stroke exhaust from another model that will bolt on the spree?

I don't want to spend a fortune...but I have to get rid of my very restricting stock pipe!

Thanks in advance!!

burnt_toast · Post by **burnt_toast** » Fri May 22, 2009 10:16 pm

noiseguy made some famous "highway speed pipes" for the spree back in the day

otherwise no aftermarket pipes made, you have to cut and weld your own

sru1317 · Post by **sru1317** » Sat May 23, 2009 1:24 pm

What about modding up another 2-stroke pipe?

Is there a specific model that fits close to the spree would that I could mock up a little easier than making a whole new one?

wiguy05 · Post by **wiguy05** » Sat May 23, 2009 1:38 pm

sru1317 wrote:What about modding up another 2-stroke pipe?

Is there a specific model that fits close to the spree would that I could mock up a little easier than making a whole new one?

Please try the search function, it works wondefully as all of this has been discussed many, many times before.

Also, buy a dio

burnt_toast · Post by **burnt_toast** » Sat May 23, 2009 5:06 pm

sure you can weld up a 2stroke pipe, thats exactly what i meant..

dio swap is way to go for serious pwr

Lunytune · Post by **Lunytune** » Sat May 23, 2009 8:48 pm

Can you go with a free flow or do you need a certain amount of restriction? How noisy would a straight pipe be?

turtle13 · Post by **turtle13** » Sat May 23, 2009 10:09 pm

for a 2 stroke engine to run correctly you require the restriction for the unburnt fuel to flow back into the cylinder to be burnt.
the animation shows why it is not necessarily restriction, but the expansion chamber that is the important part.

toboggan · Post by **toboggan** » Sat May 23, 2009 10:32 pm

It seems pretty simple to build an expansion chamber. What medals would be best for this? and what diameter pipe should you use for the intake pipe, and the end pipe?

thanks!

~toboggan

Kenny_McCormic · Post by **Kenny_McCormic** » Sat May 23, 2009 10:39 pm

Contrary to popular belief, a 2 stroke will run fine with a straight pipe, megaphone, no pipe, etc. But you have to know what the words RICH, LEAN, and MOLTEN ALUMINUM mean. I can prove this if needed.

toboggan · Post by **toboggan** » Sat May 23, 2009 10:41 pm

Care.. to.. ehm.. elaborate? lol

Lunytune · Post by **Lunytune** » Sun May 24, 2009 7:32 am

turtle13 wrote:

It appears to me that a straight pipe might create a lot of muffler explosion, plus running the risk of McCormic's law.

I have noticed that the tail pipe is very small in comparison to the exhaust pipe and in comparison to the expansion chamber... What we call a muffler. So in reality, the "muffler" has little to do with controlling noise and is designed more for combustion control.

Now how do I apply this to ballistics?

burnt_toast · Post by **burnt_toast** » Sun May 24, 2009 9:55 am

could you run a straight pipe on a 2stroke? sure, would it be a good idea is another question

it "would" run with the correct length and taper but have a super narrow powerband, be loud as crap and very inefficient

also stock exhaust does not have an actual expansion chamber but rather baffles and redirected exhaust flow for broader powerband

go learn about 2strokes first if question expansion chamber pipes, then come back and share the knowledge

for a spree, best bet: buy pocketbike 50cc chamber pipe and source spare spree muffler chop header and mate to pocket chamber then weld on mount tabs or fab brackets

burnt_toast · Post by **burnt_toast** » Sun May 24, 2009 10:17 am

could you run a straight pipe on a 2stroke? sure, would it be a good idea is another question

it "would" run with the correct length and taper but have a super narrow powerband, be loud as crap and very inefficient

also stock exhaust does not have an actual expansion chamber but rather baffles and redirected exhaust flow for broader powerband

go learn about 2strokes first if question expansion chamber pipes, then come back and share the knowledge

for a spree, best bet: buy pocketbike 50cc chamber pipe and source spare spree muffler chop header and mate to pocket chamber then weld on mount tabs or fab brackets

toboggan · Post by **toboggan** » Sun May 24, 2009 10:23 am

Where would the best place be to get a 50cc pocket bike exhaust?

circusracer · Post by **circusracer** » Sun May 24, 2009 10:52 am

Ebay is full of them.