Hawk Header Help Please!

[blackhawkdown]

Hey men I really need your help on this one. So i bought my hawk last summer but due to my mother being diagnosed with breast cancer and me having arthritis I havnt had any time to ride my hawk. I only started her once last summer and once this summer and let her run for 5 mins. Started with the good ol kickstart and stock fluids/plug so I Im really happy my blackhawk is still alive on life support shes just running lean and needs some more power. Im changing all the fluids specially oil and basics but im also going with an aftermarket header and carb/filter(my airbox was terrible and the seal was non existent). For the header ive read in other hawk exhaust forums that there are two types flange mount & slip on. Im having a hard time telling between the two but ive removed the carb and header and taken a picture so you flock members can help a brother out with deciphering what I have. I think its a slip on but im not entirely sure. Soon ill have this baby airborne thanks to this forum and cant wait to share pics when she is!

https://s14.postimg.io/bk6r38aap/KIMG0488.jpg

Also is this yoshi a slip on?
http://hawk250.com/shop/yoshimura-rs-2-aluminum-full-exhaust-honda-crf230f-2003-2014/

and lastly would this bad boy possibly fit? I found it outperforms a yoshi and has a megabombish expansion chamber which i love! First two are pics of the belparts exhaust system second link is youtube video yoshi vs. belparts...Thanks for your time gentlemen any help is appreciated!!!:tup:

https://s3.postimg.org/m7c2j0y4z/Screen_Shot_2016_08_23_at_8_40_36_PM.png
https://s9.postimg.org/47wcbgv7z/Screen_Shot_2016_08_23_at_8_41_02_PM.png

https://www.youtube.com/playlist?list=LLI_GdozEUsso6OOLxe5s4iA

Thanks again brothers!

[hertz9753]

http://www.ebay.com/sch/Silencers-Mufflers-Baffles/178000/m.html?item=221555811730&ssPageName=STRK%3AMEBIDX%3AIT&_ssn=rch-2012

That is one that most people are using. A couple of guys are using the other one that doesn't a have spark arrestor/screen and that is why I went to ebay to find the one listed above.

http://www.ebay.com/itm/Full-Exhaust-Muffler-System-Slip-On-For-Honda-CRF150F-CRF230F-Motocross-Enduro/111963933192?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D38619%26meid%3D59f85e9bcf9a443882b8cf368717 20fb%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D3215 30699660

[blackhawkdown]

http://www.ebay.com/sch/Silencers-Mufflers-Baffles/178000/m.html?item=221555811730&ssPageName=STRK%3AMEBIDX%3AIT&_ssn=rch-2012

That is one that most people are using. A couple of guys are using the other one that doesn't a have spark arrestor/screen and that is why I went to ebay to find the one listed above.

http://www.ebay.com/itm/Full-Exhaust-Muffler-System-Slip-On-For-Honda-CRF150F-CRF230F-Motocross-Enduro/111963933192?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D38619%26meid%3D59f85e9bcf9a443882b8cf368717 20fb%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D3215 30699660
thanks for your input hertz I actually know about that exhaust i was mostly wondering if my setup is compatible with a slip ons like that and if the other two that i attached pictures of are slip on

[hertz9753]

Your pictures look like stainless steel. It won't bend like aluminum to fit your bike.

Which exhaust are the pictures from? It looks like an FMF exhaust.

[jimwildman]

not likely an expansion chamber, more likely a catalytic converter.

seems like it would interfere with the clutch cable, maybey not but definetly close.

[blackhawkdown]

Your pictures look like stainless steel. It won't bend like aluminum to fit your bike.

Which exhaust are the pictures from? It looks like an FMF exhaust.
I dont intend on bending my exhaust ive removed the stock airbox & carb and freed up a lot of space seems like the only choke point is by the clutch cable. The exhaust in the pictures is a Belparts CRF230F exhaust and it outperforms the yoshi from my understanding. It is a brazillian company and they have some great headers on the market with the fmf style which i love. I wish I could just bolt on a fmf megabomb but i know thats almost impossible on a 230 as there are no years compatible only powerbomb :'( Belparts makes a megabombish like header with a FAT expansion chamber heres another youtube link with it on a crf230!

https://www.youtube.com/watch?v=H36-X7vBd74

[blackhawkdown]

not likely an expansion chamber, more likely a catalytic converter.

seems like it would interfere with the clutch cable, maybey not but definetly close.
Im almost 100% sure its an expansion chamber and not a cat. Your right the clutch cable and header mount are my two biggest worries but the expansion chamber and exhaust kit at 300-400$ is almost too hard to say no too. Heres another youtube video of the Belparts outperforming a yoshimura in a dyno or sound test possibly. This and the other video i posted have me convinced its an expansion chamber and the brap is undeniable. Sounds just like my best friends 06' WR250X with a megabomb header. Just my two cents and thanks for yours jimbo slice!

https://www.youtube.com/watch?v=ZgRhwK2BVYM

[blackhawkdown]

Also does anyone know if this yoshi exhaust fits?! I dont know why itd be on a hawk250 site under the upgrades section if it didnt but ive read every exhaust forum here about hawks and china bikes and they say nothing about yoshimuras. It seems like the pipe here is one full piece i feel like it might be an issue getting it to fit on the hawk would love anyone's opinion

http://hawk250.com/shop/yoshimura-rs-2-aluminum-full-exhaust-honda-crf230f-2003-2014/

[BlackBike]

just my opinion...not sure if you would find too much on the subject of name brand parts anywhere on this forum. I don't think many members would be too receptive of putting an $400 exhaust system on a hawk with so little to gain. (but then, i don't get out much)

Good luck to ya, looks h.q.

[chuck]

Also does anyone know if this yoshi exhaust fits?! I dont know why itd be on a hawk250 site under the upgrades section if it didnt but ive read every exhaust forum here about hawks and china bikes and they say nothing about yoshimuras. It seems like the pipe here is one full piece i feel like it might be an issue getting it to fit on the hawk would love anyone's opinion

http://hawk250.com/shop/yoshimura-rs-2-aluminum-full-exhaust-honda-crf230f-2003-2014/
It is similar to the Pro circuit t-4 I've installed on my Hawk,the t-4 was listed for the crf230l too so the yoshi should fit with some modifications.

[blackhawkdown]

It is similar to the Pro circuit t-4 I've installed on my Hawk,the t-4 was listed for the crf230l too so the yoshi should fit with some modifications.
Thanks chuck I actually just confirmed it too because i read the good old parts diagram for the yoshi and its actually a 3 part system (slip in header mid-pipe and slip on muffler) so it will definitely match up with some help from my dremel or screwdriver haha

[blackhawkdown]

just my opinion...not sure if you would find too much on the subject of name brand parts anywhere on this forum. I don't think many members would be too receptive of putting an $400 exhaust system on a hawk with so little to gain. (but then, i don't get out much)

Good luck to ya, looks h.q.
Thanks brother and honestly I just want some extra hp gains specifically bottom end other than doing sprocket sprocket change there isnt much out there. I ride for hours upstate NY high elevation and also in NYC at sea level so i need reliability & on the fly tuning. Thats one big reason why when it comes to exhausts & carbs ive been leaning towards brand name. Ive seen jetting issues with clones and knock offs first person even after a friend took it to a "shop" still had issues (Keihin clone carb on banshee). Im swapping the carb out for a genuine mikuni with K&N clamp on foam filter and trying to get as much hp possible with a nice exhaust. Then again these hawks arent meant to handle a race quality beating but I wanna see it through i get the most outta mine.

[BlackBike]

Thanks brother and honestly I just want some extra hp gains specifically bottom end other than doing sprocket sprocket change there isnt much out there. I ride for hours upstate NY high elevation and also in NYC at sea level so i need reliability & on the fly tuning. Thats one big reason why when it comes to exhausts & carbs ive been leaning towards brand name. Ive seen jetting issues with clones and knock offs first person even after a friend took it to a "shop" still had issues (Keihin clone carb on banshee). Im swapping the carb out for a genuine mikuni with K&N clamp on foam filter and trying to get as much hp possible with a nice exhaust. Then again these hawks arent meant to handle a race quality beating but I wanna see it through i get the most outta mine.

You definitely sound fired up! Look forward to the Build.

[Ariel Red Hunter]

Thanks brother and honestly I just want some extra hp gains specifically bottom end other than doing sprocket sprocket change there isnt much out there. I ride for hours upstate NY high elevation and also in NYC at sea level so i need reliability & on the fly tuning. Thats one big reason why when it comes to exhausts & carbs ive been leaning towards brand name. Ive seen jetting issues with clones and knock offs first person even after a friend took it to a "shop" still had issues (Keihin clone carb on banshee). Im swapping the carb out for a genuine mikuni with K&N clamp on foam filter and trying to get as much hp possible with a nice exhaust. Then again these hawks arent meant to handle a race quality beating but I wanna see it through i get the most outta mine.
Good idea. The head pipe is the worst I've ever seen for exhaust gas flow. At the minimum, change the head pipe, and you will be even happier if you use a copper o-ring gasket between head and pipe. I like the VM 26 Mikuni for this engine. Very easy to tune, and parts are easy to get. There are pages of info on that carb, if you hunt for them, on this forum. I would much rather have a more open muffler/spark arrester than a tachometer on an off road bike. You don't have time to be looking at a tach when you are going through the boonies. Your ear will quickly learn where you are at, rpm wise. The pilot jet, and the throttle cutaway control low end, up to 1/3-1/2 throttle. Ideally, when you have the right main jet in the carb, the needle will be in the middle slot. If necessary, raising the needle a notch richens the mixture, lowering the needle weakens it at up to 3/4 throttle. Hope this helps you.

[blackhawkdown]

Good idea. The head pipe is the worst I've ever seen for exhaust gas flow. At the minimum, change the head pipe, and you will be even happier if you use a copper o-ring gasket between head and pipe. I like the VM 26 Mikuni for this engine. Very easy to tune, and parts are easy to get. There are pages of info on that carb, if you hunt for them, on this forum. I would much rather have a more open muffler/spark arrester than a tachometer on an off road bike. You don't have time to be looking at a tach when you are going through the boonies. Your ear will quickly learn where you are at, rpm wise. The pilot jet, and the throttle cutaway control low end, up to 1/3-1/2 throttle. Ideally, when you have the right main jet in the carb, the needle will be in the middle slot. If necessary, raising the needle a notch richens the mixture, lowering the needle weakens it at up to 3/4 throttle. Hope this helps you.
Thanks for the encouragement hunter! There are so many dam vm 26s out there im having a hard time deciding on that too...these two genuine mikuni vm26s caught my eye although they are spigot mount so i would need a spigot to flange mount but let me know what you fellow bird gang members thing about these two on a hawk!!! They share the same jet types as a banshee i think stock which makes availability almost universal which i like...here they are

www.ebay.com/itm/New-Real-MIKUNI-26MM-carb-VM26-606-ROUND-SLIDE-CARBURETOR-/310776591031?hash=item485bba72b7:g:eUgAAOxy4dNS-Pep&vxp=mtr (http://www.chinariders.net/www.ebay.com/itm/New-Real-MIKUNI-26MM-carb-VM26-606-ROUND-SLIDE-CARBURETOR-/310776591031?hash=item485bba72b7:g:eUgAAOxy4dNS-Pep&vxp=mtr)

http://www.ebay.com/itm/New-Mikuni-Round-Slide-VM-26mm-Carburetor-ATV-Dirt-Bike-VM26-8074-/231467847234?hash=item35e48f0e42:g:hR4AAOSwwbdWQkW S&vxp=mtr

[pete]

wish I could find out what if anything is inside the
power bomb / mega bomb....
quite easy to build with a couple of Stainless cones..




..

[Azhule]

wish I could find out what if anything is inside the
power bomb / mega bomb....
quite easy to build with a couple of Stainless cones..




..

Nothing was inside the "FMF PowerBomb" header on my Kawasaki KLR 650... just an open pipe with an "expansion chamber"...

PowerBomb Header is designed for extra HP/Torque at higher RPMs

MegaBomb Header is designed for more HP/Torque at lower RPMs

[Weldangrind]

wish I could find out what if anything is inside the
power bomb / mega bomb....
quite easy to build with a couple of Stainless cones..

I can't imagine how I would build a stainless cone in my shop. A slip roller would be one way, but I don't have one (yet).

[pete]

You can buy them... for joining tubes of diffrent dia's
i havn't got a set of rollers for cones that small either..


...

[pete]

Nothing was inside the "FMF PowerBomb" header on my Kawasaki KLR 650... just an open pipe with an "expansion chamber"...

PowerBomb Header is designed for extra HP/Torque at higher RPMs

MegaBomb Header is designed for more HP/Torque at lower RPMs

Thanks
good info...
now just find a good piture of a Mega bomb on a 250cc bike so
I can take a scale of a known size part of the bike then
measure the mega bomb useing that scale...



..

[REBELyell]

Looks like an "anti- reversion chamber" to keep consumed/exhausted gases from re entering the combustion chamber. it has a cone shapped pc inside and directs any unwanted backflow of dead gases to the sides, within the pipe chamber instead of flowing directly back thru the center of the pipe and back into the cylinder during cycles of low pressure. http://wiki.clubcivicquebec.com/images/f/f1/Anti-reversion_chamber.jpg

[Ariel Red Hunter]

Thanks for the encouragement hunter! There are so many dam vm 26s out there im having a hard time deciding on that too...these two genuine mikuni vm26s caught my eye although they are spigot mount so i would need a spigot to flange mount but let me know what you fellow bird gang members thing about these two on a hawk!!! They share the same jet types as a banshee i think stock which makes availability almost universal which i like...here they are

www.ebay.com/itm/New-Real-MIKUNI-26MM-carb-VM26-606-ROUND-SLIDE-CARBURETOR-/310776591031?hash=item485bba72b7:g:eUgAAOxy4dNS-Pep&vxp=mtr (http://www.chinariders.net/www.ebay.com/itm/New-Real-MIKUNI-26MM-carb-VM26-606-ROUND-SLIDE-CARBURETOR-/310776591031?hash=item485bba72b7:g:eUgAAOxy4dNS-Pep&vxp=mtr)

http://www.ebay.com/itm/New-Mikuni-Round-Slide-VM-26mm-Carburetor-ATV-Dirt-Bike-VM26-8074-/231467847234?hash=item35e48f0e42:g:hR4AAOSwwbdWQkW S&vxp=mtrSome how I missed this, blackhawkdown, my apologies. In my opinion, and if I was buying a carb for the Hawk, I would buy the VM26-8074. And I've got what I think are good reasons. I would never spend money for a carb that does not give me the absolute maximum performance, especially for less than a hundred bucks. This carb uses a cold start jet instead of a butterfly choke in the intake area. So what, do I hear you say? Because the butterfly and the shaft it is mounted on acts as a flow restricter on the intake side. If I'm spending my money, I want the maximum performance I can afford. I don't think the choke assembly really hurts performance until you are above half throttle. But I want it all. Now that's just my opinion. But it is based on working with this carburetors sisters as well as Mikuni's for more than sixty years. I have no opinion on square slide carbs. I only worked with round slide carbs. Like Amals, Dell Ortto's, Bings, Keihins and Mikunis.

[Ariel Red Hunter]

Looks like an "anti- reversion chamber" to keep consumed/exhausted gases from re entering the combustion chamber. it has a cone shapped pc inside and directs any unwanted backflow of dead gases to the sides, within the pipe chamber instead of flowing directly back thru the center of the pipe and back into the cylinder during cycles of low pressure. http://wiki.clubcivicquebec.com/images/f/f1/Anti-reversion_chamber.jpgThank you for that link. An "anti-reversion chamber" would be of advantage on an engine tuned for mid-range power and torque. Like on a Hawk. But if you are tuning for maximum power at the upper part of the range, and had an exhaust cam to utilise reversion (to ram raw air-fuel mixture back in the head) then that style of anti-reversion chamber would not be helpful. Perhaps even harmful.