Honda 750 Nighthawk exhaust system modification

Рет қаралды 133,721

blytheluv

13 жыл бұрын

Some believe low and mid range power can be enhanced by doing this. I show you how.

Пікірлер: 65

@AllThingsSuperMoto 10 жыл бұрын

sounds so sick without baffles

@WolfTheMadMan 6 жыл бұрын

I've always loved the mechanical sounds in the exhaust of nighthawks.

@blytheluv 13 жыл бұрын

It's just slightly louder with a little crisper sound. It has definitely improved power and responsiveness. I am happy with the change. I don't think it's legal to leave off the end pieces, but I am not sure. Somewhere I think I have a clip of the exhaust sound before the modification..If I find it I'll post.

@Hendrix. 9 жыл бұрын

Did you do a before & after gas mileage results?I'd be interested to find out if drilling those holes increased or decreased it.It did sound better.

@hockeynate908 12 жыл бұрын

it does sound better without the end pieces. i have a 91 nighthawk 750 and i am going to try this but try a couple different things with the baffle and see whats good or bad. ill put a video up of the different sounds.

@toomuchbeer07 6 жыл бұрын

Sounded better when you took the inner pipes out and ran it open.

@sweetpotato3950 7 жыл бұрын

modifying exhausts without increasing jet size causes a lean fuel-air mixture that could lead to burnt valves and piston faces

@ugirl2 11 жыл бұрын

my stock exhaust was custom cut shorties with baffles cut, my vid shows them it sounds pretty wicked just got a used vance and hines for real cheap so im selling them.

@blytheluv 13 жыл бұрын

@lynzack No carb work needed with four 3/8's holes on each funnel.

@carrysmith2008 12 жыл бұрын

ill belive all those exhaust modifications n after marker pipes give u more power,when i see a before n after dyno performence sheet.

@jamesbregel3692 8 жыл бұрын

My baffles will not come out even with hammering the pilers as I pull. Nor did pb blaster help, I doubt you will respond but I hope you do.

@papatorr3669 3 жыл бұрын

Well done

@ricardoaurelius 9 жыл бұрын

Great Video.. Thanks..

@blytheluv 11 жыл бұрын

I need to try that carb modification.

@weedy397 5 жыл бұрын

I have drag pipes that sound like yours. Without the backing added back.

@blytheluv 13 жыл бұрын

I drilled four 3/8" holes of each side. It has been working great.

@CraigBMM 4 жыл бұрын

make a video !! lets hear it ! :)

@richiesympson7248 2 жыл бұрын

Did you have to do any re jetting

@jgr144 12 жыл бұрын

i have an 84 CB700s it basically has the same exhaust. i removed the baffles but i cannot remove the mufflers buried inside the pipe is there anyway i can do this without cutting them open

@PrinceKlutz 9 жыл бұрын

I'd like to hear it accelerate thru the gears, approaching thru first and second, and going away third-fifth. That would be a test of sound. Revving it without a load is not a true test. JMO

@dfw_motorrad1329 8 жыл бұрын

+Nomad Ryder The exact thing I think on every exhaust video.

@CraigBMM 4 жыл бұрын

yes .. i'd like to hear it on the road .. going through gears

@gusgarcia8968 8 жыл бұрын

beauty beast sound

@HB-yq8gy 6 жыл бұрын

I did this after watching video, no differences sounds the same.

@blytheluv 5 жыл бұрын

but it's possible your engine might perform better?

@InfernusEternum 12 жыл бұрын

I just hacked off the tube with a cutting wheel, same effect, less labor.

@smokeymcbongwater3561 5 жыл бұрын

Whut u dont do to your factory pipe

@3628778 10 жыл бұрын

thanx

@tonyrichengod9280 3 жыл бұрын

Hello all. I'm wondering if anyone knows this : Does the 4-1 exhaust system of a CB400 Super Four fit on a 4-2 CB750 Nighthawk? I'm trying to swap the system on my 750 for a 4-1 to reduce weight and noise. Would it work? Or are there better options for this? Thank you.

@Long-nd8bq Жыл бұрын

Delkevic makes a CB750 4-1 exhaust that will fit. It's for the early 80's bikes but it does fit. You just have to shorten the muffler pipe a little to get the mount to line up.

@chrisbrowne4064 Жыл бұрын

Sounds like shit should left the baffles out.

@OkJustAMinute 3 жыл бұрын

What is the name of the inner piece? I just bought a nighthawk and the previous, previous owner removed the inner part, for me it's too noisy and I'd like to see if I can find just those parts so I can reinsert them.

@Long-nd8bq Жыл бұрын

baffle

@juntjoonunya9216 6 жыл бұрын

would have been useful if you had the before sound

@conraderb 5 жыл бұрын

Louder is not the same as more low and mid-range power. Back pressure is important, too.

@youridv 5 жыл бұрын

no they don't kzfaq.info/get/bejne/oNCAmLOQs9SWcmg.html here's a very detailed 9 minute video by an engineer explaining why "needing backpressure" is a myth

@bricklayerlzdp9825 4 жыл бұрын

Run it without baffles and retune. Sounds way better

@shawnwhite08sw 11 жыл бұрын

I have a 650. it's not quite the same design exhaust, but is it the same concept to doing so?

@blytheluv 5 жыл бұрын

probably

@cosmoswanderer5936 9 жыл бұрын

can i take my those out completely on my 250cc 2005 ? i need it to be louder i was almost hit by a car the other day.

@noahbillingsley8347 9 жыл бұрын

If you want to burn the exhaust valve out and have to get the engine rebuilt then go right ahead. You can't take those out you lose back pressure

@noahbillingsley8347 9 жыл бұрын

If you want it louder just buy custom pipes and get the bike jetted that's the proper way to do it

@AlightBULLDOG 9 жыл бұрын

Noah Billingsley actually all you have to do is possibly the jet the carb. You burn valves by running lean and engines lean out because of enhancements but usually take more than straight pipe exhaust to do that. If you deleted the stock air box and put shorty pipes on it then yah probably. But all you have to do again is re-jet.

@brianmurphy2382 6 жыл бұрын

loud pipes don't save lives,smarter riding does

@JesusGarcia-fg6xy 4 жыл бұрын

@Boards0nfire 12 жыл бұрын

I have a 450 nighthawk, how did it run without the baffles? I want to take mine out completely, think it'll run good?

@blytheluv 5 жыл бұрын

i think so, but some people say you may need to modify the carburation

@JesusGarcia-fg6xy 4 жыл бұрын

@lynzack 13 жыл бұрын

did any carb work need too be done? ie jetting changes

@blytheluv 5 жыл бұрын

i added the small washers to needle jets

@blytheluv 5 жыл бұрын

you can probably search on that (adding small washers to increase fuel flow)

@elijahjohnston3172 Жыл бұрын

@@blytheluv how many did you add one or two? Im planning on removing the baffles entirely ive read online people having great success with removing the baffles and shimming the needle jets

@drewboyles6719 6 жыл бұрын

Sounds like someone lit a duck on fire

@carrysmith2008 9 жыл бұрын

after your done messing with your factory exhaust system,put ur bike on a dyno machine and ur gonna see,you didnt improve in anything it just got louder,ive had 2 buddies put there bikes on a dyno machine after removing the pipe baffles and both bikes,lost between 1/2 to 3HP on top end and the bikes fuel economy dropped from 45MPG to 38 MPG..

@blytheluv 9 жыл бұрын

I didn't/don't recommend totally removing the pipe baffles; the modification I did involves drilling a series of holes into the baffles and re-installing them. I wanted to refer you to the web page that I used as a guide, "Tim Hodge Exhaust Mod" on www.nighthawk750.com, but it appears that web page is not working at the moment... But I was able to see a cached version of the page: webcache.googleusercontent.com/search?q=cache:RtmlTDGTpecJ:www.nighthawk750.com/mods/exhaust.html+&cd=1&hl=en&ct=clnk&gl=us&

@bruceclark5627 8 жыл бұрын

then you need to tell your friends to tale the time to rejet their carbs because after the same mod and rejeting my 1982 450 night hawk seen on a DYNO at C.W.MOTORSPORTS in effingham ill.a 7 h.p. increase at the WHEEL .that also included opening the air box with a stock replacement air filter.

@bruceclark5627 8 жыл бұрын

also the baffle wasn't removed it was opened up.next time watch the whole video before getting snarky.nothing worse than being arogant and wrong.

@MrPavePaws 5 жыл бұрын

4 into 1 replacement. Starts pretty quietly. Up to the power band it sounds like it wants to be seen. At 4500-8000 it has this wheeee that let's ppl know I'm passing them. If I coast in a more relaxed gear (30mph in 3rd not second) it sounds like a classic 50s muscle car BLUB BLUB BLUB.

@elijahjohnston3172 Жыл бұрын

Remove the baffles entirely and shim the needles in thr carbs with 1 or 2 #4sae washers. Will run like a bat out of hell. Thank me later

@timkis64 Жыл бұрын

you got to be careful with honda's.they use backpressure combined with lean carb. jetting to get by the EPA.they are very lean to begin with.when you reduce backpressure it leans them out farther.thats why many honda's run worse than stock when you reduce stock backpressure WITHOUT increasing pilot & main jet sizes.why in the hell would anyone want a louder but slower bike without upping carb jets to compensate.its like only wiping half of your ass.