Ive never had a power-valve equipped bike before, among other things I mainly rode/raced yz80's from 87-89/90 and I had a couple questions about the power-valve on my 03 rm 125 I got last month.
Far as I understand the valve is open at low rpm, and closed at higher rpm controlled by exhaust pressure, is this correct?
I kinda figured that the action of the valve and the powerband of the engine are tuned to work together in a way. When the valve opens/closes is it something I will/should feel when riding the bike?
I dont see anything on it in the manual, is this valve adjustable? or require any adjustment?
I havent had a chance to really get out and ride the bike much, I dont think its been fully up to temp. either, the couple of times I cruised it down the street is the only riding I have done yet. I went through the carb and verified the jetting is all stock and the previous owner said he ran 40:1 which is still in the tank(manual says 30:1 which is what I plan to run in it), I notice alot of exhaust coming out of the "breather" tube on the exhaust valve(again this is when the engine is cold/barely warmed up), is this normal?
Thanks for any replies.
Far as I understand the valve is open at low rpm, and closed at higher rpm controlled by exhaust pressure, is this correct?
I kinda figured that the action of the valve and the powerband of the engine are tuned to work together in a way. When the valve opens/closes is it something I will/should feel when riding the bike?
I dont see anything on it in the manual, is this valve adjustable? or require any adjustment?
I havent had a chance to really get out and ride the bike much, I dont think its been fully up to temp. either, the couple of times I cruised it down the street is the only riding I have done yet. I went through the carb and verified the jetting is all stock and the previous owner said he ran 40:1 which is still in the tank(manual says 30:1 which is what I plan to run in it), I notice alot of exhaust coming out of the "breather" tube on the exhaust valve(again this is when the engine is cold/barely warmed up), is this normal?
Thanks for any replies.
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