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Old Yesterday, 08:29 PM   #1
ThatDude114 OP
Joined: Jun 2014
Oddometer: 6
DT175 Carb Jetting

Hey guys,

So I was wondering if anyone has any suggestions on jetting. It's a 1980 Yamaha DT175 it has a 1mm over Wiseco piston, and I premix my fuel. I'm using the stock 24mm Mikuni carb along with the stock air filter and box. I'm lost on how much to adjust the jetting, especially since it's been bored 1mm over. If you guys could offer any insight into what size jets I should be running that would be great, don't really feel like holing an $80 piston.

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Old Yesterday, 08:39 PM   #2
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Joined: Sep 2012
Location: In the hot, hot, dezert
Oddometer: 526
You shouldn't need to rejet, but if you want to sleep well at night go up one size on the main jet to be safe. If it blubbers go back to your previous main jet.
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