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DT125R Forum -> JETTING -> Jetting
Post Info TOPIC: Jetting
Derbyian


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Jetting
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What would the gains be if I was to get bigger carb jets??? 2003 dtr deristricted exhaust, inlet deristricted. Is there a noticeable difference???

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xGINCATx


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I never noticed a difference going from a 210 to a 240 on my 04
And also after doing the so called "inlet" restriction it only made my bike run slower..
Jetting should only really be done if you're playing with the amount of air your bike is taking in (removing the snorkel, cutting the airbox to bits for example)

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Derbyian


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Thanks, it did 80 before and I've recently changed the rear tyre from a 90 to a 110 with big knobblies on.... Think that could be where the speed has gone due to drag? Just thought of trying a bigger jet and prob filter to gain a little .

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NorDt


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When derestricting your exhaust or using a gianelli, dep or anything like that, you should get a 240-250 jet. Or else you will seize. I did.

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Sold the DT, Bought a WR 426. Sorry guys.
Derbyian


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What would recommend 250? 240?

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NorDt


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I dont know. i used 250 on mine with the gianelli. But a jet doesent cost much . just try them out both and do a plug check ;)

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Sold the DT, Bought a WR 426. Sorry guys.
Derbyian


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I'll get both and try them. Did you notice the difference?

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Derbyian


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From standard jet that is

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NEV


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Maybe e-mail these see if they'll post over to U.K Ian.
http://www.mikunioz.com/index.html

or £15 quid on this parts list number 30

http://www.gileraspares.co.uk/spares/epc2.asp?ModelID=9138&pageID=7&uid=0



-- Edited by NEV on Friday 17th of February 2012 09:45:40 PM

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NorDt


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You wont notice any other difference than your engine not seizing.

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Sold the DT, Bought a WR 426. Sorry guys.
NorDt


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atleast i didnt

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Sold the DT, Bought a WR 426. Sorry guys.
Derbyian


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It's got a 240 in already. But I've come across a big problem now. Looks like somebody had played with the mixture before and chewed the screw and threads to bits! Just spent the past 2 hours trying to drill it..... Looks like a new carb is needed or the part at least. Doooh!

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Derbyian


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It's chewed all the thread on the housing as well so no way of getting it out. Will have to get the housing as well . Will any dt carb fit any bike?

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