question what is the advantage of the Y peice?

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mooseman
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question what is the advantage of the Y peice?

Postby mooseman » Sat Aug 11, 2007 2:03 pm

i see a lot of talk about y bits can someone explain why they are so popular?
2004 Boxer Cup ye ha........
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bluemanc100
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Y Piece

Postby bluemanc100 » Sat Aug 11, 2007 2:59 pm

The Y Piece prevents the engine being strangled by exhaust gases that can't escape the engine

The difference on my GS was remarkable

Not tried an 1100s with a cat , but my boxer cup with y piece goes well!

can't have a y piece and K&N though without power commander or a laser chip, i have had to go back to a standard filter, engine had a flat spot and ran too lean

Anyone got a twin spark laser chip for sale????
Steve Heywood
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winger

Postby winger » Sat Aug 11, 2007 3:32 pm

Yes you can,i ran mine for the best part of 6 years with an open system a K+N and then a SJ filter,it's only in the last 12 months i fitted a PC,yes it's better(miles) but it ain't life and death.
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bluemanc100
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lucky

Postby bluemanc100 » Sat Aug 11, 2007 5:03 pm

sounds like you got away with it

mine was very lean on one cylider, white plugs the norm when ridden hard

its tons better with the standard air filter, i would like to try it with the laser chip , must be a hoot
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NC24, NC30 Uk Spec, VFR 800 Vtec, BMW R850GS (now written off), BMW R1150GS, BMW R1100S Mamola BCR, Buell Ullysses, BMW R1200S, BMW R1100S 05 BCR , Gixxer K7 Thou - Mamola BCR with Ohlins
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Postby Paul » Sat Aug 11, 2007 6:14 pm

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chobbler
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Postby chobbler » Sat Aug 11, 2007 7:17 pm

winger wrote:Yes you can,i ran mine for the best part of 6 years with an open system a K+N and then a SJ filter,it's only in the last 12 months i fitted a PC,yes it's better(miles) but it ain't life and death.


Didn't know the twin spark had been around for 6 years.
My 2 spark was the same before the laser chip. it was a melt down waiting to happen.
Maybe the single spark map was more generous?
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winger

Postby winger » Sat Aug 11, 2007 8:31 pm

My single spark has!!
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SteveH
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Postby SteveH » Sun Aug 12, 2007 6:24 am

Short thread hijack (sorry Mooseman) Can anyone say what power increase can be expected from replacing the cat with a y-piece, and making no other changes? End of hijack :roll:
Steve
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madman
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Postby madman » Sun Aug 12, 2007 8:31 am

In my experience, you won't find anymore top end power with the Y piece, but more mid range.
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nab 301
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Postby nab 301 » Sun Aug 12, 2007 1:08 pm

madman wrote:In my experience, you won't find anymore top end power with the Y piece, but more mid range.


Agreed having done the same, and they don't rattle. 8)
With just the y piece mine is putting out 82 bhp (which would be lower than most)but i've no before and after dyno comparison.

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oyster
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Postby oyster » Mon Aug 13, 2007 4:10 am

i see a lot of talk about y bits can someone explain why they are so popular?

And it's lighter....
Oyster. 1999 R1100S. Almost original.
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Harry
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Postby Harry » Wed Aug 15, 2007 2:54 pm

and it sounds way betterer.
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