Performance Exhaust

Is there any type of performance exhaust for engines ranging from 26cc to 80cc. I want my bike to have that performance sound if you guys no what i mean.

 

http://www.motoredbikes.com/viewtopic.php?t=674

 

You will go farther faster if it is done quietly. Stealth is where it is at. :smile:

 

LOUD IS BETTER!!!!!!!!!!!!!!!!!!!!!!

was that some kind of quote? anyway, no, the best exhaust is loud because it doesnt have all that packing to quiet it and that backs up the engine. LOUD IS BETTER!!!!! my opinion, loud sounds better and tells people that there is power somewhere in that dinky moped engine but quiet reminds people of the vespa :shock: and vespas are GAY!

haha...whatever

 

I just rode mine this morning without the muffler (not by choice ) and it was a loud, obnoxious, gutless POS!

 

Re: LOUD IS BETTER!!!!!!!!!!!!!!!!!!!!!!

Basically hes saying you dont want any cops getting too many complaints about your engine noise.

 

Mr. Garcia,
I want to ride the San Gabriel River and LA River bike paths at 5:00am.
No sea birds should be disturb, I want a good look at them. No residential areas should know I have passed through. Rail trails might be an option at some date. Noise and vibration are tiring after an hour of exposure. One can run longer if the ride is smooth 'n quiet.
On the road I wish to offer the lycra set no offence. I may end up running with them for days if I ride the coast (Hwy 1).
My kit will be here Tuesday. :smile:

Running a loud pipe is like putting a siren on the bike. Here I am, look at me, pull me over for a chat. :grin:

 

Well, I've got to pipe in on this one. I'm torn between two schools of thought, and I'm just giving my 2¢. When I first built my bike, I ran it the way it should be, with all the muffler fastened together. Then one day I noticed a sudden surge in power, with a much louder motor. I looked down and noticed my muffler was coming apart! The bottom cylinder had come apart because the long bolt had vibrated loose. Once the muffler was cool, I removed then entire bottom outer cylinder and rode around with it like it was. I LOVED it!! Sure, it was much louder, but the extra boost in power was like a drug. I've never looked back, and I've never once had a complaint or pull-over. Of course, there are other factors to consider, such as: I don't ride nearly as much as most of the guys on here, I don't ride in the wee hours of the morning or after 9 p.m., and the cops in my locale may be more tolerant to me, especially if I don't ride stupid. If I'm concerned about the neighbors, I'll kill the motor and just pedal in. Also, my spark plug is brown and dry, and my motor is still running clean.

 

Re: LOUD IS BETTER!!!!!!!!!!!!!!!!!!!!!!

I bet your mother rides a Hardley Ableson......

 

I gota go with Barret on this one.

I blew an exhaust gasket last weekend and it was bad but good :grin:

I got the rush also but did not go as far as taking the botom off instead I cut the internal pipe off to about half an inch.

It had a similar power boost but was not that much louder especially mid to top end.

I also opened up the airway on the carby to allow for the extra flow

 

haha, thanks for laughing at me everyone for my last post. but i found a better solution for increasing performance without much metal work.

check this out: http://thatsdax.com/BICYCLE_ENGINE_KIT_TIPS.html

i havent tried this idea yet because im gonna build my own custom expansion chamber and custom exhaust and i dont wana have the stock muffler, i wana transform any stock stuff on my motor so that its my own custom ride!

check out that site, not a bad idea.

jon

 

exhaust

you need an expansion chamber on a 2 stroke, silencer mods dont do anything.

 

expansion chambers are cool and all but i dont have the money, time, or experience to fabricate one...so instead i just take the bottom section of the muffler off and take it down, it sounds like shooting a full auto 22 calibur rifle, lol. taking the buttom muffler piece makes a dramatic difference, it gives better tork and its great when im climbin' steep dirt hills.

this is just my opinion, jon

 

Back Pressure

Seems part of speed formula and efficiency. I think if back pressure is eliminated, the engine can run too hot or lose pull?

Frankly, I prefer quiet anyway, as I am often cruising in residential areas.

Trying to quiet my Tanaka and will post separate results, if it is simple, small and works.

 

i like the low profile and quietness too when cruisin down town with an illegal 70cc motorbike (if it was inspected not as a 50cc) but its nice to have that intimidating sound when your doing the stoplight drags. i got some money in my pocket anyway so i figure ill just buy an expansion chamber pipe and modify it to fit my bike, looks are all i need. :grin: :grin:

jon

 

My attempt to quiet the

T-3300 failed, using copper pipe. It did nothing to quell fan and intake noise. All in all, motor with stock muffler is quiet enough, just close to my ear.

Stealth is best...

 

copper pipe!?!?!? copper conducts heat at a quick rate. worst idea ive heard in a long tim...

im gonna buy an expansion chamber pipe on ebay and have my friend fabricate it to my bike with an adjustable pipe :grin:

jon

 

Copper is not

that bad.

I physically clamped it to the exhaust pipe and soldered the rest. It really did not get that hot, as the air and original muffler acted as an efficient heat sink. You could touch it not long after motor shut.

See two pics. I removed explanation as it was a bust, but since you commented... 2 styles

 

HI All,

I've done some reading on the benefits and the design of a proper tuned pipe but my question is how would a back yard mechanic such as myself roll / bend? the sheet metal needed to fab up a tuned pipe (actually probably somewhat thicker than sheet metal since I wouldn't want it to just crumple up like a tin can if I accidentally tapped it against something) .

Welding and cutting the pieces would not be a problem for me to do and I could make templates for the sheets of steel by mocking up the proper design using construction paper and tape).

I am assuming that specialized dies and presses would be the best to make the pieces but what process can be used by the person using average tools
(maybe some body working tools?)

Thanks
Andrew