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Post Info TOPIC: Big One' Full System


DTR Respected Member

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Big One' Full System
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I'm looking for a full system that's going to de-restrict the bike without breaking the bank.

I've seen a 'Big One' full system for £155, I'd value your opinion on whether it's a good deal or not and what sort of reputation 'Big One' systems have?

big_on10.jpg
The current exhaust system's in a right state so I've got to replace the lot cry.gif


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I.O.M DTR


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or look for a second hand standard exhaust, and gut it,


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My 2c, haven't heard many good things about this setup - it being mainly power loss and weak performance gains.

I've learnt from being here that best combo is a Dep tail pipe with gutted standard front pipe as Frogboy suggests. Same performance gains as a full Dep if not better at a fraction of the cost.

http://www.activeboard.com/forum.spark?aBID=66365&p=3&topicID=30438573






-- Edited by Spartan on Monday 8th of March 2010 06:48:44 PM

-- Edited by Spartan on Monday 8th of March 2010 06:50:01 PM

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DT125X 2007


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Much appreciated.

My local Yamaha dealer said that all the restriction is in the front pipe so DEP tail pipe and gutted standard pipe looks like the best way forward.

Time to find the angle grinder and spend a bit of time on ebay!

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Nice man, going to do the same with mine but undecided at present, a full dep system does look the mutts nuts tho biggrin

Can you weld too?


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DT125X 2007


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stock pipes go like feck ;)

best way forward :D



btw: i had a full big one system, it actually gives a nice kick when going into the powerband! but i think that might have something to do with being **** in lower revs ! but anyways its not an all bad pipe!
gutted stock is much better tho!

if you get stuck, i have a big one expansion here you can use, barely any rust and not holes. £40 if NEED it, then stick it on ebay later on .. get a stock pipe tho ;)


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Yamaha DT125R - 2003



DTR Senior Member

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dont bother with bigone.. my tail pipe is still good after 3 years but the front pipe rotted with 2 years.. deps aint much better either.. the bigone is stronger than the dep though.. as for power differences, the dep feels like the power is shifted higher up the rev range whereas the bigone has the power a little lower.. get a solid stock front pipe for £30, gut it then get a dep tail for £40 (alu and wont rot!).. dep performance the cheap way.. can even paint the stock pipe silver so it "looks" like a dep!


-- Edited by element on Monday 8th of March 2010 11:39:00 PM

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04' DT125RE 32k miles and counting / 89' DT125R 3RN1 Rebuilt + Supermoto'd.
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