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DT125R Forum -> Tuning -> What happens when you open the power valve?
Post Info TOPIC: What happens when you open the power valve?
craigbulmer


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What happens when you open the power valve?
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What happens when you open it..
how does the bike behave in the lower revvs?
how bad does the MPG get?
is it still as easy to pull off and ride?
thanks for any replies, want the bike faster so i want to open it but not sure if i should lol
craig


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Yamaha DT125R - 2003
Seiki


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From what i've read , higher top end and lower bottom end .

I plan to run it off the lights bobsled stylee and catch up lol

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Seiki


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source a servo

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Gixergav


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Open the valve.Try it.If you dont like it put it back where it was.
Only you will know if you prefer it by riding it.
MPG will be less if your running in the high RPM more

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craigbulmer


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ok thanks, il give it a go smile

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Yamaha DT125R - 2003
PatMan


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If its lower bottom end then my powervalve cant be open or can it? cos my take off is flipping quick for a DT what you reckon gang?

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craigbulmer


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what have you done to it?
cuz i dont really want a lower bottom, i want a higher top speed and better acceleration, mine has basically none of either atm haha
maybe when this gasket problem is fixed it might be better :/


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Yamaha DT125R - 2003
Jonpearson17


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When you close your PV you get More bottom end power but no power mid-top rpm, Open the power Valve you get no bottom end power but tons of top end power. If you leave the powervalve to do its job you will get bottom end power and top end power.

-- Edited by Jonpearson17 on Thursday 20th of August 2009 02:13:13 AM

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craigbulmer


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so is yours open on your dt?
so doesnt it not accelerate quickly in low revvs?

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Yamaha DT125R - 2003
Jonpearson17


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Mines working so its closed at Low rpm and opens when the revs go up

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