hawk stock exhaust question

[eco4arcs]

If i unscrew the muffler cap and remove the hitech mesh baffle will i reap any performance benefits beyond the more satisfying sound?

Any jetting change suggestions? Running 115/30 now.
thanks

[farmbath]

I couldn't tell any difference other than the sound is better.

[Sport Rider]

I punched mine out with rebar and probable gained 5 HP on it!

</sarcasm>

:-D

Seriously...nothing of consequence gained.

[BlackBike]

hell, sport rider says it's true (5 hp), in fact sign him up for a late nite infomercial (make sure to use the British accent)

[Azhule]

Depending on the design of the HAWK exhaust I'm sure a few ponies can be gained depending on what all you change/remove from the restrictive exhaust, just look how nasty and restrictive the Bashan header is and the muffler is no better

First they jam some kind of Coil/Spring/Soda Can inside for your exhaust gasket

Then they do a crap job and weld the INSIDE of the header making it at least 2/3rds as restrictive as it should be

[lee47512]

Originally Posted by Azhule

Depending on the design of the HAWK exhaust I'm sure a few ponies can be gained depending on what all you change/remove from the restrictive exhaust, just look how nasty and restrictive the Bashan header is and the muffler is no better

First they jam some kind of Coil/Spring/Soda Can inside for your exhaust gasket

Then they do a crap job and weld the INSIDE of the header making it at least 2/3rds as restrictive as it should be

Do you have all the clean air stuff? evap and egr stuff? That looks to be a catalytic convertor my hawk has none of that at least I don't think so.

[Azhule]

Yeah my bike came with most if not all that nonsense, the header also has a small sound dampening Baffle/Restriction built in it shortly after the "Big Egg/Catalytic Converter".

I'm sure after I change out the exhaust and tune my 197cc Bashan properly I could see an extra 5 - 20% (if not a little more) HP and Torque across the entire rev range... but it was extremely restrictive compared to others from the looks of things

[culcune]

Originally Posted by BlackBike

hell, sport rider says it's true (5 hp), in fact sign him up for a late nite infomercial (make sure to use the British accent)

I knew it!!!

[BlackBike]

Originally Posted by Azhule

Yeah my bike came with most if not all that nonsense, the header also has a small sound dampening Baffle/Restriction built in it shortly after the "Big Egg/Catalytic Converter".

I'm sure after I change out the exhaust and tune my 197cc Bashan properly I could see an extra 5 - 20% (if not a little more) HP and Torque across the entire rev range... but it was extremely restrictive compared to others from the looks of things

yes, definitely help you in your mile high zone.

anything possible, think wide nonrestrictive stainless tube, smooth inner bore. (give me money, lots of money.) someone will take a poke at it, too many people signed up recently (gear-heads cant resist).

[lee47512]

Originally Posted by culcune

I knew it!!!

Didn't he go to jail for pot or something lol?

[2LZ]

To the best of my knowledge, we don't have dyno numbers on the Hondoid pushrod motor regarding HP gains with mods but they are available for the Q 200 OHC motor. Using that as a comparison,....proper jetting and exhaust mods did give a full 5hp gain from 15 to 20....and for those who have been asking, this is what an FMF Turbine Core 2 sounds like. I will say this...putting a breather, proper jetting and a slip on pipe (no cat) on all of my Hondoid pushrod motors has definitely increased the performance.

[Azhule]

Those Zong OHC engines are 'fairly cheap' to get too, under $700 shipped for the air cooled ?223cc? version, and it should bolt right in place of my current pushrod motor/frame mounts if my measurements are correct (drool). Once the Mrs. gets used to riding a motorcycle I might have to swap out for a bigger, better, more powerful Zong OHC engine (or a different bike all together )

But back to exhausts, does anyone know if the HAWK and Bashan exhausts are "interchangeable"? The inexpensive and free(er) flowing HAWK exhaust would be a nice addition to any restrictive Bashan Dual Sport... but are the measurements and frame design similar enough to work?

I'm also looking into a FMF PowerBomb Header off a few different Honda's, if any of them measure out right I might be able to pick one up for as 'little' as $150

[ughmas]

Originally Posted by 2LZ

To the best of my knowledge, we don't have dyno numbers on the Hondoid pushrod motor regarding HP gains with mods but they are available for the Q 200 OHC motor. Using that as a comparison,....proper jetting and exhaust mods did give a full 5hp gain from 15 to 20....and for those who have been asking, this is what an FMF Turbine Core 2 sounds like. I will say this...putting a breather, proper jetting and a slip on pipe (no cat) on all of my Hondoid pushrod motors has definitely increased the performance.

nice sound... I think you officially sold me on the TC2 for my tt250 in due time. I wasnt sure how a 2-stroke pipe would sound on a four stroke.

[Jayman77]

Originally Posted by lee47512

Didn't he go to jail for pot or something lol?

Yeah but I bet he could sell the heck out of the stuff

[SpudRider]

Originally Posted by ughmas

nice sound... I think you officially sold me on the TC2 for my tt250 in due time. I wasnt sure how a 2-stroke pipe would sound on a four stroke.

About 7 years ago I installed an FMF Universal Spark Arrestor on my Zongshen Sierra 200. This silencer meets U.S.F.S. requirements for sound levels, and a spark arrestor. It increased the power output from the engine, and dropped a lot of weight from my motorcycle. It is well built, and easy to repack. I am very glad I installed it.

http://www.chinariders.net/showthread.php?t=7196