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DT125R Forum -> Tuning -> Spluttery at 7000rpm?
Post Info TOPIC: Spluttery at 7000rpm?
mammoth200


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Spluttery at 7000rpm?
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Just after a little bit of help and advice gents, I've had my DTR a little over a week, and I love it, brilliant fun to ride around on, and I'm getting more fun out of it than I used to get on my Mito!

However, I have recently found that in most gears, moreso in fifth and sixth, when I get to 7000rpm it coughs splutters and struggles. I haven't done a compression test as of yet, but I dont think the rings need changing or anything. If I let the bike hang between 7-8000rpm then I can eventually get it to push past the barrier in that gear, but if I want to carry on like that i have to smash the tits off it all the way through the rev range.

I'm hazarding a guess that the powervalve blade might need cleaning?

The other thing I wanted to know is, how can i find out if it has been completely and correctly de-restricted? I'm guessing its the usual routes of exhaust (I have a 2003 DTR with a full dep system) and carb jets, but what are the de-restricted sizes?

Also, is there supposed to be any sort of airbox mod when de-restricting? After scouring the internets for details on this I've found a few good nuggets of information, but no real definitive guide. Unless I didnt look hard enough and I'm missing something... lol

I do remember reading something about a wire that needs disconnecting somewhere? Not sure if that applies to my particular model.

Any help is much appreciated, cheers gents.


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Dingle001


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Im sure I remember reading about a similar problem on this forum a couple of months ago. Go back a few pages and i think it was suggested it was a PV problem.  If that doesnt work, it sounds like it could be running a bit rich on the midrange so check that the needle clip is in the central slot. It could be on a lower slot. Good luck and hope this helps.

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CooS


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U need to up-jet mate

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mammoth200


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Okay cheers for the help so far, I'll see if I can track down that thread, that's fair enough if I need to upjet, but to what sizes?

Cheers

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You are one person, out of 7 billion people. On one planet, out of 8 planets. In one starsystem, out of 100 billion star systems. In one galaxy out of 100 billion galaxies

and you are enormously insignificant.
louisBOSS


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myns doing this , at about 7k it gutters like splutters, only get to about 7and a half , its got a 230 main jet with a full dep .Might up jet or do you think 230 is fine , Its a dtr

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mammoth200


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Best to upjet to a 260 I found, however I did do quite a few little mods to get mine working perfect, its all in this thread

http://dt125r.activeboard.com/t41768293/carb-jetting/



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You are one person, out of 7 billion people. On one planet, out of 8 planets. In one starsystem, out of 100 billion star systems. In one galaxy out of 100 billion galaxies

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Reef


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that link jus refreshes the page mate :)



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GADGET


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yup it does lol

shame as im havnin the same prob with my mates dt but higher up the rev range

every gear so its deffo a carb prob/or the coil

am going to try both (carb/coil) on my dtr and will let you all know if it still happens then we will know at least lol

any other suggestions greatly appriciated

thanks guys



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PatMan


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I had this problem awhile back Put a new spark plug in that was that sorted try that

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mammoth200


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Bumped the old thread with the details in as I can't get the link to work :s

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You are one person, out of 7 billion people. On one planet, out of 8 planets. In one starsystem, out of 100 billion star systems. In one galaxy out of 100 billion galaxies

and you are enormously insignificant.
louisBOSS


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Hi myn never rev past 8.5k ive had it now , my old aerox what my mate has now keeps beating me . the ped is quick has

stage 6 pro
r pipe yasuni
21 mm carb
malssio hype overange varitoe
malssio overeange torqe drive
rollers
clutch spring , did have clutch



Myn is a r reg , dtr 125 full dep pipe , Its now doing what it did a few weeks ago, just doesnt want to rev out in any gear .When i get it fixed so it revs half decent, should i look every were, or is it normal for my dt to rev to 8.5k . ?

The power valve is fully open , its not that boggy low down tho , its alot and i live in the city .

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mammoth200


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Louis, read the thread called 'Carb jetting' it's a couple of threads below this one.

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You are one person, out of 7 billion people. On one planet, out of 8 planets. In one starsystem, out of 100 billion star systems. In one galaxy out of 100 billion galaxies

and you are enormously insignificant.
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