Well...im debating here still......I think im gonna go ahead with the baffle removal... noow....

Do i just punch all the way around the baffle coming out the back and she will jus come out or what??

Need some help here...

sean

 

WTF are you talking about????? Are you talking about removing the "end plate"?????? Don't do that!!!!!! the baffle is inside the muffler, you can remove it by cutting the muffler in half, cut it out, and weld the muffler back together. If you remove the end plate you have zero back-pressure and you will jack stuff up!!!!!

 

actually, all you have to do is unscrew a srcew at the end of the muffler, pull it out and put the screw back in.

 

How will it jack stuff up? I've talked to my grandpa about this subject several times and he has said in all his years of being a mechanic he has never seen any valves burnt up from running a straight pipe. He actually says its better for an engine to not have a muffler on it. To prove that he said he had a car for about 15 years and all he ran on it was a straight pipe and he never once had to grind a valve down. But i could be wrong, are these trike engines that much different than a car engine where they require a lot of back pressure? If so i really need to stop running my 350x cuz i couldn't get one of the damn bolts out for theplate to come off even w/ vice grips on it, so i just ended up havin to punch it out. I haven't rode it much since i did it but i haven't noticed the engine running any differently at all and it still has absolutely no smoke when i first start it every day. Can anyone clarify this for me?

 

You bring up a good point, and I need to revise a little of what I said:

Your grandpa is 100% correct on the straight pipe, but ask him to run the engine with no header/manifold on it and see what he says! You need a tuned length of exhaust for cylinder scavenging, if you go less than required for that engine you will fry the exhaust side of the head. The "safe point" on a ATV is to hollow out the muffler and leave well enough alone. You might be able to cut the header in half and run it fine, but who knows???? PLUS who wants a 140dB noise for 2 hours of riding, right at there right leg??????? I have a stock exhaust hollowed out; and my riding partners complain that after I pass them , they can't hear there bike to shift gears! PlatinumDogg... I would like to suggest........ taking the baffel out and welding the muffler back together, you will get the best of both worlds, free flow exhaust, and it will sound meaner! HAPPY?????

 

I found this very good artical from "White Brothers"

A 4- stroke engine enters the exhaust phase, the piston moves upward, and the exhaust valve opens as spent gases flow into the exhaust pipe making room for fresh fuel. There is however a quantity of unburned gases that remain in the combustion cham-ber.It is at this instant, when both intake valves and exhaust valves open, that a properly designed exhaust system can help scavenge as much of the residual gas as possible. The more efficient the scavenging, the less diluted the incoming fuel-air mixture will be.

the exhaust valves open, a shock wave is generated which travels down the pipe. When it reaches the end of the pipe, negative pulse is reflected in the reverse direction. If the length of pipe is adjusted so that the suction wave arrives back at the exhaust valve just before it closes, a vacuum is created, allowing the cylinder to be charged with a purer mixture. The inertia in one moving exhaust packet assists the flow of the next charge. A purer mixture can now enter each cylinder, resulting in stronger explosions and more power.

Essentially, this type of tuning produces an increase in power over a relatively small RPM range. The suction wave produced is a combination of high energy and short duration. A wider powerband can be created with the use of a diffuser. There are two types of diffusers on motorcycles; Conical and Radial. A Conical diffuser is commonly called a megaphone (or S-Bend/Tail pipe in some cases). A radial diffuser is the E-Series Disc. Basically, a diffuser creates suction waves with a lower energy peak and longer duration. A simple way of understanding the process is thinking of a diffuser as creating a continual series of suction waves, providing effectivea 4 stroke engine enters the exhaust phase, the piston moves upward, and the cylinder scavenging over a much wider RPM range.

 

Thanks a lot for clearin that up for me, you about had me scared that i was hurtin my engine w/ only the baffle out cuz this engine has vry vry low hours on it and i'd like to keep it running strong for many years to come.