Big one and dep exhaust systems dtr 125

[Polsta]

im looking to get a new exhaust system for my dtr

full dep is £240 and chrome
full big one is £140 and black , and can be repainted down the line when it gets a bit older

anyone know if they would both give the same performance wise or any pros /cons of them both ?

heard the dep rust really easily,and also dent cery easily,most dts on ebay with them the front pipes are dented right up, that puts me right of them !!

[twotakt]

TBH there isn't much difference between the performance gains from a big one and DEP pipe. Apparently the DEP pipe gives a little more high end power whereas the Big One gives more low end power (I don't know how true this is though).

Personally I'd go for a DEP silencer (for the looks) and a Big One expansion chamber (cheaper and the same performance gains, albeit at a different rev range).

Or you could save the £ and put it towards doing your test (if you haven't done it already) .

EDIT: All expansion chambers will dent, which is a good reason to not buy an expensive one.

Ta,
Jack
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R.I.P. Tareree Shiimi, 1985-2008

[Polsta]

cheers mate

see a full dep for £240 is pricey really, i heard just having a de restricted standard front pipe and a dep rear is just as good ? , i took my exhaust of last week,and the restriction bit on the manifiold bit had already been removed

,ve only had the bike about 3 weeks/month, so im gonna stick with it till next year when my insurance runs out before doing a full test !

[----]

If your going to use it off-road,you should stick with the standard one.
I really regretted paying £240 for my dep system because there was no power gain at all,and i was a bit worryed about going off road incase i dented it.
If your just going to use it on the road,and only want it for the looks then that's fine,but it is really high maintenance.After a few days the front section will start to discolour,and in less than 2 month you will see surface rust.

If i was you id go for the big one as it's black anyway,rather than paying all that extra for the shiny dep which in the end you will have to paint black anyway .

Actually,if it was me i'd keep the standard fully de-restricted front pipe and get a big one silencer
If you spend £240 quid now on a dep system,it'll look rough as hell by the time you come to sell it,which means you will have wasted £240 quid,where as taking my above advice,you can just repaint it and it looks good as new and costs next to nothing .

So have you took it off road yet then?
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DRZ-400sm

[Polsta]

yeah im leaning more towards the big one, as i said above the rusting,easily denting, and price...isnt exactly a winning combination, i was thinking the same as youve just said, buying the big one rear silencer and having that with the standard front pipe, or maybe even buying a whole big one system,as its only £70 for the front pipe, rather than double that for a dep

not taken it major off road yet, as ive been geting used to riding it the last couple of weeks and ive not got any decent gloves or boots yet or found any good places where i wont get in trouble , been on a few tracks tho, one of them is excelent goes right up a hill in the woods and is a legal lane, been up there a few times just getting used to riding on that kinda surface of gravel and mud and that

its a bit crap not having anyone to ride with aswell, which would make it a lot more fun

are public bridleways legal to go down on a bike ?

theres a place opening up soon for bikes on a pay to ride thing, not far away so im gonna gte up there

thanks mate

[element]

[oJaXo]

so does the DEP end can fit onto the standard stock dt exhaust and the big one exhaust?

[AAAthreat]

Yip it should do mate ive heard of a few people who go down the DEP back can and Big One front pipe route. What about buying one of those Tecno expansion chambers from Ebay they go for about 100 I bought one for my DT to go along with the DEP silencer, it sounds like a YZ125 now and not like a scooter its loud as fuck.

[oJaXo]

[AAAthreat]

Ill be honest mate it was not easy to fit and we even had to bend a bracket on the bike so that it would, ive heard of people having similar problems with the DEP pipes.

[AAAthreat]

https://www.vimeo.com/1473583

Here's a vid of the Tecno expansion chamber, it's crap sound quality ill try and get a better camera and record it again. The exhaust sounds better in RL.

[oJaXo]

gotta admit that does sound really nice
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A2 License - 26/03/09 PASSED!
Fs1e -> 03 dt125r -> 99 Hornet 250 -> 95 CB400 Super Four R - > Hornet 600 2013

[AAAthreat]

TY mate Ill try and get a better vid with a good camera the sound quality is terrible on my camera, the bike sounds allot crisper in RL.

[glynny1]

ive just bought a dt 125 , and im wondering what would give her a nice deep throut sound , my friend had a bigone exhause but ive never heared a dt sound the same im thinkin he may of drilled holes in the airbox , i dont want to ruin the bike just a nice note

[bykerbaz]

[feckless]

[bikersupermot...]

just to add my experience :-

i bought a 2005 dt125x ... it already had a dep full system on it and the powervalve cables had been disconnected and the valve pinned open.

it rode so badly. at traffic lights, it had so little power to get moving that 50cc automatic mopeds overtook me. (no rev counter on the newer dt's, but im guessing) but at around 7/8000 revs it wud fly ... the power came in hard and the front wheel wanted to lift.

thats totally useless in city traffic but ok on open roads where i cud keep the revs high and the bike on the boil.

i had the power valve re-connected up to see if it wud give me bit more bottom end and less top - but didnt seem to make any difference!.

the next day out riding, the bike started misfiring under load and backfiring when trying to keep it from stalling at traffic lights. eventually it died.
the piston was fried. the top ring had welded itself into the piston solid.

so now im looking for a standard yamaha pipe (if anyones upgraded their dt and doesnt need the old pipe - pls drop me a line! ) to get it back to standard.

all that upgrading to a dep pipe by someone has caused me to have a broken bike for some of the best weather in scotland (we dont get much as it is!!) so i wouldnt recommend it. (the silver front pipe looks nice tho! but its been too much trouble)

knowing what i kow now, id never change from the original pipe and wish the last owner of my bike didnt either as its just been cost and hassle to me now.
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tinybikes

[bikersupermot...]

it in my previous post i know ... but if you've upgraded the exhaust on yr dt .... an dont need/want the original front and back pipes ... drop me a line if u wanna sell em ...

i got a 2004 dt125x electric start (supermoto version) so any of the pipes from a 2003 onwards i thinks wud do the job (someone correct me if im wrong here pls, thx!)

id b really grateful - i want a bike to ride for whats left of scottish summer!
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tinybikes

[bikersupermot...]

latest update on my dt125x ... just bought an original yamaha (older + derestrictred) dt125r front pipe to replace my (nice lookin but useless) dep front pipe ...

and tonight i bought a fresco end can to give it a nice noise but keep the performance of the original de-restricted yamaha exhaust!.

with the power valve all re-connected up ... am hoping this combo will give me some decent bottom end a bit less of the wild (that destroyed + blew up my engine!) top end! will know next week when the pipes are here and attached!
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tinybikes

[c_dug]

Mate it sounds like it wasn't re-jetted when the DEP pipe was fitted, causing it to run lean and too hot.

Or alternitivly if it was re-jetted then it may run rich with the standard pipe back on it, 2 strokes can't really just be mix and matched with the parts, as somebody above said, you need to know what you're doing.

If you're any good with a set of spanners I personally would take the carb apart and just double check what size jets are being run and what they should be, better to be safe than sorry. Rather do that than do another full rebuild in a months time

c_dug
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[bikersupermot...]

hey cdug ... thx for the update ... im useless when it comes to the techy stuff like jet sizes etc ...

for the standard yamaha derestricted front pipe that im fitting ... what jet size(s) will give the best low end performance?
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tinybikes

[c_dug]

Really wouldn't have a clue to be honest, put a thread in the workshop section and somebody with a bit more knowledge on the subject will give you a hand i'm sure.

Although what your asking for is pretty specific, so I wouldnt be suprised if you get told you but a couple of jets going up in size from the original and then just testing to see which feels best.

c_dug
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[baldyowldbike...]

[quote="Polsta"]im looking to get a new exhaust system for my dtr

i would try to get a hold of a turbokit fullsystem. they are 'E' stamped so raod legal. just put one on my step sons dt and its transformed the bike. get in touch with mailto:thor@te-motorcyclespares.co.uk or https://www.te-motorcyclespares.co.uk/ the person who sorted us out was called david, knows his stuff too.
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only really on here as just fitted a turbokit pipe to my stepsons little dt50r and cant believe the thing wheelies in 2nd offa throttle!!!!!!!!

[baldyowldbike...]

[quote="Polsta"]im looking to get a new exhaust system for my dtr

i would try to get a hold of a turbokit fullsystem. they are 'E' stamped so raod legal. just put one on my step sons dt and its transformed the bike. get in touch with mailto:thor@te-motorcyclespares.co.uk or https://www.te-motorcyclespares.co.uk/ the person who sorted us out was called david, knows his stuff too.
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only really on here as just fitted a turbokit pipe to my stepsons little dt50r and cant believe the thing wheelies in 2nd offa throttle!!!!!!!!

[johnmicy]

thanks for postings

Exhaust Systems