4 replies to this topic

[gi125]

hi,
i have a 05 sherco 125 and it is a bit smokey

my dad has dropped the needle to weaken off the mixture but it still smoking , running on 50 to 1 on castrol

would a new piston and rings resolve it or do you have anymore suggestions

thnks

[copemech]

Run the bike on 80:1 full synthetic, or at the very least Yamaha 2R semi-synthetic, easy to find usually.

Then go out and blow the smoke out og it to get all that oil out of the exhaust!

[gi125]

copemech, on Aug 10 2008, 06:46 PM, said:

Run the bike on 80:1 full synthetic, or at the very least Yamaha 2R semi-synthetic, easy to find usually.

Then go out and blow the smoke out og it to get all that oil out of the exhaust!

thnks i will get me dad doin tht then

or is ut just the exhust because its got alot of stuff in it ?

[copemech]

A 50:1 mix is more commonly used in older air cooled motors.

With the watercooled motors, the 80:1 ratio with high quality oil seems the standard now, although some may argue to a point. Fact is, many who do not ride really hard have successfully run at 100:1 for years now without problem.

If you have ridden your bike for a length of time at that ratio. the muff is bound to be full of oil. They can clog up badly and the sherco muff is not easily cleaned(another story).

What I normally recommend is a good hard run down the road a bit through the gears, like a drag race. Done about a half dozen times will get the exhaust REALLY warmed up, and chances are it may light off some of the oil and start smoking like a freight train, just billowing, that is the excess buildup!

Let it cool down and try it again! When the excess ig is gone, it will stop that! After that, only a periodic hard run or a tough trial with some good long uphills will keep things from excess buildup. And if you are a young lad just putting about a lot and never really revving the crap out of it, you may well consider the higher ratios even. Put this way, if the pros can run 80:1 you should be just fine.

Bar end plugs help keep your bike from blowing up when you fall on the throttle side!

[gi125]

thnks for tellein me that i will do i tomorrow and run it up amn down the road

i will reply back if it doent work