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Discussion Starter · #1 ·
In one of my 650 that i have never had the carbs apart, I just pulled the carbs apart to clean and found 310 mains. seemed a bit fat to me, but always ran well with brown plugs at 500 feet above sea level at about 10- 30 degrees also running dg pipes, engine has never been bored over ether. what is every one else running in similar conditions ?
 

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My 91 650 with Aaen pipes I ran 270s, 280s, 290s, or 300s depending on temps. Gas was better then also.
 

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in my 600 tripple stock with psi pipes i run 2 sizes over stock (stock was 260) in the mag and center cyl and 1 more size bigger in the pto side. so 280,280,290. down below say 15 degrees i run another notch fatter on all. i always use the rule of thumb of pipes = 2 sizes bigger on jet size then jet for temp.
 

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just took my 91 650 carbs apart and found 330, 330, 310? not sure if i read it right. the two 330's are hard to read. im running decker pipes also.
 

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Discussion Starter · #6 ·
to check piston wash do I have to take heads off? and is it worth checking if plugs are golden brown? running br8es plugs which i think are hotter plugs that br9es
thanks for the help
 

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Rainman56 said:
BR8ES is a colder plug.The lower the # the colder the plug.
^^^^^^^
The above info is incorrect. The opposite is true.

An 8 is hotter than a 9.
 

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tnmemr said:
Rainman56 said:
BR8ES is a colder plug.The lower the # the colder the plug.
^^^^^^^
The above info is incorrect. The opposite is true.

An 8 is hotter than a 9.
x 2. 8 is a hotter plug
 

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^ Could be or could be dirty jets or alot of other stuff
 
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