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post #1 of 9 Old 06-16-2014, 12:06 PM Thread Starter
 
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another 954 exhaust question!

yo yo yo! so im looking to get a new aftermarket pipe on my 954 but had givin some thought to possibly modifying the stock one. im really just looking to make the bike sound better/louder. i was wondering if anyone has cut down the stock pipe n how to do this. i know aftermarket pipes are pretty much a straight thru design n thats pretty much a no-brainer but i really have no idea whats going on inside the stock 954 pipe. ive looked on youtube n searched for some info on the subject but couldnt find a write up or a video. i know people have surely done this n would love it if someone could point me at a nice write up or just give me an idea of what id be getting into on the inside of the pipe n what i could expect out of the sound it makes after chopping it down. thanks!!
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post #2 of 9 Old 06-18-2014, 11:29 PM
 
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Re: another 954 exhaust question!

Hey there! But cutting your pipe is not always the best idea but it can work! You just have to remember that cutting the pipe or upgrading to an aftermarket setupwill allow for better airflow out of the exhaust, causing your air-fuel ratio to change which will affect how your bike runs. So if you plan to cut your exhaust or buy aftermarket be ready to buy a Power Commander or some thing similar and have it dyno tuned.

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post #3 of 9 Old 06-19-2014, 12:21 AM Thread Starter
 
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Re: another 954 exhaust question!

im probably going to buy an rs3 yosh pipe just because i found one thats brand new for less than half the price. my hope is to just find a shop with that yosh box in house to re-map it for the bike n save me the cost of the pc right now. i was told by the dude thats got the pipe i wouldnt need to cut the spark arrestor off for the rs3 so hopefully thats the case. i mean im fairly confident the spark arrestor its self doesnt do much one way or the other to affect the back pressure but im not gonna chop it off if i dont gotta. im not even worried about the hp gains id get from a aftermarket pipe to be honest i just want it to sound more the part. i like a loud bike personally
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post #4 of 9 Old 06-19-2014, 12:30 AM
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Re: another 954 exhaust question!

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Originally Posted by 954Kevin View Post
im probably going to buy an rs3 yosh pipe just because i found one thats brand new for less than half the price. my hope is to just find a shop with that yosh box in house to re-map it for the bike n save me the cost of the pc right now. i was told by the dude thats got the pipe i wouldnt need to cut the spark arrestor off for the rs3 so hopefully thats the case. i mean im fairly confident the spark arrestor its self doesnt do much one way or the other to affect the back pressure but im not gonna chop it off if i dont gotta. im not even worried about the hp gains id get from a aftermarket pipe to be honest i just want it to sound more the part. i like a loud bike personally

Do you mean that the Yosh box will remap the Honda ECU?
If you're only changing the muffler you shouldn't need to map anything.
Cutting the cone off is _very_ common, it won't affect performance.

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post #5 of 9 Old 06-19-2014, 5:59 AM
 
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Re: another 954 exhaust question!

The rs3 yoshimura is a good one, but since you have a stock one you can play a bit with it. Shortening the muffler, and changing the density or type of the mineral insulation may do the right job for you

Remember, as bladeracer said above - you don't neet to remap anything, if you are only changing the muffler.

Actually if it is not a track/race bike - remapping doesn't make sense to me since the HP gain/loss is felt on the track and the numbers are in rare cases reaching 10-15 hp if you have a really good exhaust generation and a really experienced tuner to map it to the bike.
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post #6 of 9 Old 06-19-2014, 8:28 AM Thread Starter
 
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Re: another 954 exhaust question!

yeah the yosh box remaps the factory ecu. now its said that the yosh box isnt a pc and has its limits but that for light mods like a slip-on and a filter or things of that nature the yosh box works great. it just doesnt have the same amount of adjust-ability as a pc. they do it in house with a dyno but its a lot less expensive than the pc. its just an option i guess. like i said im just a street rider and the 954 is well into having enough power for me personally. im not trying to win any races except with myself and im on a budget. but i do want it to sound better. i mean it runs great with the stock pipe but it could sound a lot better. i found the rs3 brand new in the box fr 150$, its never even been installed n guy said he paid 350$ so im gonna buy it. its a pretty good deal and im not exactly the biggest yosh fan but the rs3 kinda fits the look of the bike well and i already know a yosh pipe sounds pretty good. im going to check around for the yosh box at some of my local shops but like i said i dont even care about hp gains all tho i wouldnt turn them down. i just dont want any decrease in performance but like bladeracer said its just a bolt on and i dont think throwing a bolt on pipe is going to do anything but good for how it runs if anything but it should sound a lot better and louder. it just is to quiet and i for one think you outta be able to hear a bike, specially a liter bike coming a block away!
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post #7 of 9 Old 06-19-2014, 11:40 AM
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Re: another 954 exhaust question!

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Originally Posted by 954Kevin View Post
yeah the yosh box remaps the factory ecu. now its said that the yosh box isnt a pc and has its limits but that for light mods like a slip-on and a filter or things of that nature the yosh box works great. it just doesnt have the same amount of adjust-ability as a pc. they do it in house with a dyno but its a lot less expensive than the pc. its just an option i guess. like i said im just a street rider and the 954 is well into having enough power for me personally. im not trying to win any races except with myself and im on a budget. but i do want it to sound better. i mean it runs great with the stock pipe but it could sound a lot better. i found the rs3 brand new in the box fr 150$, its never even been installed n guy said he paid 350$ so im gonna buy it. its a pretty good deal and im not exactly the biggest yosh fan but the rs3 kinda fits the look of the bike well and i already know a yosh pipe sounds pretty good. im going to check around for the yosh box at some of my local shops but like i said i dont even care about hp gains all tho i wouldnt turn them down. i just dont want any decrease in performance but like bladeracer said its just a bolt on and i dont think throwing a bolt on pipe is going to do anything but good for how it runs if anything but it should sound a lot better and louder. it just is to quiet and i for one think you outta be able to hear a bike, specially a liter bike coming a block away!

I know it can remap Suzuki ECU's, just never heard of it working on Honda.

Yep, the LEO's love to hear us coming...

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post #8 of 9 Old 06-19-2014, 12:14 PM Thread Starter
 
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Re: another 954 exhaust question!

you know im not real sure if it works on a honda or not? i know the ecu has a chip n storage for the maps just like any ecu n so i just assumed itd work on the honda as well? maybe not tho. ive tried to find out online n im not finding any examples of it used on a honda. o well guess ill just hafta wait till i can afford a pc but ill see how it feels without it because im getting the pipe and the pc will hafta wait if i even think it needs it!
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post #9 of 9 Old 06-19-2014, 5:44 PM
 
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Re: another 954 exhaust question!

I have also never heard of yoshimura box for Honda. Actually the PC is the only thing I have seen on Hondas, not including cheap junk boxes simulating the air temp sensor. Maybe its better this way.
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