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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes
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TOPIC: Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes
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paulfuller (User)
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Do OEM 1600 have smaller I.D. vs 1700 head pipes 7 Months, 1 Week ago  
I am trying to figrue out if 4vn and 5vn stock header pipes have same or different inside diameter? Or is the number just different to meet EPA branding rules.
 
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Last Edit: 2017/02/19 10:23 By paulfuller. Reason: vague
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 7 Months, 1 Week ago  
They are the same and interchangeable thru 07. 08 and newer have the 02 sensor bung in them and will fit the older bikes but the hole for the O2 sensor needs to be plugged.
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 7 Months, 1 Week ago  
Thanks, so the different part number on the back of the pipes is just CYA for Yamaha and the EPA
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
So why different part number? I know raphazen had pics of his mufflers comparing the outlet side and the 1700 and 1600 mufflers and the 1700 appeared to have larger holes size, and the mufflers looked larger in diameter as well.
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
Don't know, but they all fit and are interchangeable as stated above.
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
paulfuller wrote:
So why different part number? I know raphazen had pics of his mufflers comparing the outlet side and the 1700 and 1600 mufflers and the 1700 appeared to have larger holes size, and the mufflers looked larger in diameter as well.
That is interesting, I have always heard that they are interchangeable, with the FI bikes needing bungs. I have never heard anything about them maybe having a different size I.D.
Maybe the 1700 is larger to get air out faster due to the larger displacement?? Seems like the stock 1700 exhaust would be a little bit louder than the 1600 then. But, maybe it's it not enough of a difference to tell.
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
Thanks davej but I just want to find out for sure. I have some 1700 mufflers and 1600 header pipes the mufflers are 34mm id at the outlet side and the pipes are 30mm id at the exhaust port side. Anyone got a set of 1700 pipes and a 1600 mufflers they could check for me?
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
The OEM muffler has a thick outer gasket to fill that gap. it actually slips around the header pipe and the muffler slips over it. here is the part number

. .Gasket, Silencer
5KS-14755-00-00

it is #8 on the parts fiche
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  


That wasn't what I was asking, I am trying to find out the inside diameter (id) of a 1700 header pipe (exhaust port end) of the pipe, and the 1600 id of the hole on the mufflers at the noisy end.
 
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Last Edit: 2017/07/17 10:46 By paulfuller.
 
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Re:Do OEM 1600 have smaller I.D. vs 1700 head pipes 2 Months, 1 Week ago  
paulfuller wrote:
That wasn't what I was asking, I am trying to find out the inside diameter (id) of a 1700 header pipe (exhaust port end) of the pipe, and the 1600 id of the hole on the mufflers at the noisy end.

Forgive me if I'm wrong but don't you mean the outside diameter (od) of the header pipe and the ID of the muffler inlet? Having the ID of both pipes won't give you much of an indication if one fits snugly over the other, or am I missing something?
 
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