upjetting dt for a dep exhaust?

[lee125]

hi just bought this dep exhaust for my bike for a bargain of a price
and i was wanting to know what size jets i need to put in my carb so it runs properly and not lean thanks

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=017&item=270037289276&rd=1&sspagename=STRK%3AMEWN%3AIT&rd=1
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cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[hmmmnz]

page is not coming up, im assuming its just the end can, if so 1 size up on the main jet should do it, if any thing at all, if its a free'r flowing full system then up 1 or 2
put it on and go for a quick blast and see if she is running lean, i didnt need to change my jet when i just replaced the can
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[lee125]

hi no its the expansion chamber the front bit
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[Tim_H]

i'm interested in this too. (Just fitted a big one front pipe.)

as it's revving much higher now, the bike gets a sort of - i'm about to seize slowly - feeling after a sustained length of time in the powerband.

Also where does one buy the jets from?

[lee125]

the size jet in my carb at the moment is 240 do i nee a larger one? if so how big thanks
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[hmmmnz]

i dare say you will need a larger one, as to how large i couldn't tell you, i would get a selection from 1 size up to 4 sizes up from standard, and have a play,
remember to make sure you have enough 2 stroke oil flowing when you up the fuel mixture (i presume it an auto oiler) not a mix in the gas tank job.
good luck.
it looks like a nice pipe
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[element]

Certainly is a bargin. They are around £150 new! Have you posted on DRI? theres alot of DT owners on there
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04' DT125RE (run-a-bout) // 89' DT125R (rebuilt + supermoto conversion)
SPARES FOR SALE. 2RK TZR // 82 DR125 // DT125R/E .... PM ME...

[lee125]

whats the website for dri? cheers
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[lee125]

found it i googled it lol have put a post on there aswell
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[lee125]

no ones getting back:( lol anyone have any idea or know where i can find out? thanks
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[Jebus]

you cant really adjust the oil feed on a dt, upjeting is more a case of trial and error but for a full system you will need to upjet, and for the front pipe you will dont need to for the can tho.
____________________
2nd time around CBT: 8/9/11
125 Varadero

[Tim_H]

if you've got a 240 jet, then it's a late bike - '99 on. (according to Mr Haynes) with the later carb. - Mikuni TM28SS.

(Interestingly the earlier DT's had 26mm carbs)

The 240 is standard, but I know of nowhere who sells larger ones. - i'm trawling the net as I type.

By upping the amount of oil, you actually make the fuel / air even leaner, so it's not an option really.

Either leave the oil pump alone, or pre-mix your own fuel.

For the top end revs that the new front pipe will allow, it's definately worth having more fuel than less.

Perhaps doing a plug kill test (if that's what it's called) will answer our question.

[Jebus]

if the jets for all mikuni carbs are the same then these guys www.dirtbikestore.co.uk will sort you out, along with many over very sexy offroad bits for your dt. As far as the plug test goes, this is what dep recommend when fitting a full system, for this get a new plug, gap it right and stick it in. run the bike up 2 normal operating temp then stop it, let it cool down a bit so you dont burn your fingers then pull the plug back out and if its the proper colour then you shouldn't have anything to worry about, if its anything else it will let you know what you need to do regarding mixture adjustment or jetting. I really dont think that you need to do anything that major.
____________________
2nd time around CBT: 8/9/11
125 Varadero

[lee125]

hi i managed to get a 250 jet off my dealer but didnt run good so upped it to a 260 and seems to be running well now but need to get a dep or big one rear silencer so it runs smoother than it is thanks
____________________
cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years

[JpWard]

I needed different pilot jets (Mikuni) for my Yam Quad and i just cross referenced parts from another Yam and got my local dealer to bring them in!

What is the sizes for a 06 DT when you put a front and rear pipe on as my wee bros will be doing this when warrantee is up?

[Tim_H]

I personally don't think that the silencer makes hardly any difference to the jetting.

You've already freed up all the required breathing by replacing the front expansion pipe.