660 Carb settings?????
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Right here is one for you guru's
2004 MZ Mastiff completely stock apart from a GPR exhaust system with the baffle still in.
Brand new spark plug fitted, fresh Shell fuel, carb mixture setting is as it should be stock (2 & 1/2 turns out).
I have ran it with a stock mixture setting and it pops and bangs on the over run really badly and very loudly!!!
I removed the plug to check it and it is white on the ground electrode which suggests running lean despite the electrode tip itself was a nice brown/grey colour so the mixture could not of been that far off.
Obviously the popping and banging during the over run does suggest a lean mixture anyway!
So to typically richen the mixture, you turn it in on most motorcycles HOWEVER I have came across 1 or 2 bikes in my time that work the other way round :-/
So I turned the mixture screw in a 1/2 turn from stock (so 2 turns out) which has made no difference on a small ride so I have turned it a 1/2 turn out from stock (so 3 turns out) also to no avail... it still pops and bangs loudly on the over run
???
So my first question is-
1- what way does the mixture screw work on this bike? Does it need to be turned in or out to richen or lean the mixture?
And 2- is anyone else running a stock bike with an exhaust system and still using the baffle? If so, what mixture setting have you found best for your bike???
All info is much appreciated![:-)](./images/smilies/001.gif)
Thanks fellow MZ'ers
2004 MZ Mastiff completely stock apart from a GPR exhaust system with the baffle still in.
Brand new spark plug fitted, fresh Shell fuel, carb mixture setting is as it should be stock (2 & 1/2 turns out).
I have ran it with a stock mixture setting and it pops and bangs on the over run really badly and very loudly!!!
I removed the plug to check it and it is white on the ground electrode which suggests running lean despite the electrode tip itself was a nice brown/grey colour so the mixture could not of been that far off.
Obviously the popping and banging during the over run does suggest a lean mixture anyway!
So to typically richen the mixture, you turn it in on most motorcycles HOWEVER I have came across 1 or 2 bikes in my time that work the other way round :-/
So I turned the mixture screw in a 1/2 turn from stock (so 2 turns out) which has made no difference on a small ride so I have turned it a 1/2 turn out from stock (so 3 turns out) also to no avail... it still pops and bangs loudly on the over run
![Sad :-(](./images/smilies/icon_sad.gif)
So my first question is-
1- what way does the mixture screw work on this bike? Does it need to be turned in or out to richen or lean the mixture?
And 2- is anyone else running a stock bike with an exhaust system and still using the baffle? If so, what mixture setting have you found best for your bike???
All info is much appreciated
![:-)](./images/smilies/001.gif)
Thanks fellow MZ'ers