Ayesully810
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Posts posted by Ayesully810
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Brand new gas.. Unless Sunoco is pumping old gas out
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Here's what the plugs looked like the other day when I pulled them out.. Temperature outside was 24 degrees different if that matters. 66 today when I ran it, 90 last Sunday here
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Also both pipes heated up to the same temperature this time after I put new plugs in.
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Update.. Checked compression..
90ish psi in both cylinders (did 3 tests on each cylinder) couldn't check the coil because I don't have a fly wheel puller but i pulled the plugs out and kicked it over with them on the head and they are both sparking.. Put in new plugs and ran much better. Still a little hesitation but def pulling better on the band. I turned the air screws out a half turn but no needle adjustment yet. Here are my old plugs.. They were wet pulling them out and still blowing oil out the back..
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eOP, read that article.
You said yourself that you changed your ratio from 32:1 to 40:1 because your plugs looked black and wet,
The oil in the pre-mix isn't what's making your plugs look that way, it's your jetting.
Your motor was jetted too rich with 32:1 to begin with and now you've added more fuel by going to 40:1.
I wanna make sure I rule out everything else though before I start changing things in the carbs like JD and the above article suggested.
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Chris, my bike is shooting oil out of the back like this article talked about.. Infact yesterday when i was letting it idle, it left a bird shot of oil on the ground and the back of my swing arm after revving it a few times.
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Or you can try what I suggested with your airscrews and needle clip position to see if my theory about you changing your pre-mix is valid.
That too, sorry didnt mean to leave that out, was not dismissing what you suggested, much appreciated. Ill be back with updates within the next day
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OK, let me try to explain this.
5 gallons of fuel is 640 ounces.
32:1 pre-mix you need to add 20 ounces of oil to 5 gallons of fuel. << 660 ounces of pre-mix.
In a specific volume of 32:1 pre-mix you will have less parts per million of gasoline and more parts per million of oil.
Now shoot 32:1 pre-mixed fuel thru your carb mixed with a fixed volume of air.
The 32:1 pre-mixed fuel has less actual combustible gasoline and is now mixing with a fixed volume of air flowing thru your carb into your motor.
The air/fuel mixture has less fuel for a fixed volume of air and is now actually leaner.
40:1 pre-mix you need to add 16 ounces of oil to 5 gallons of fuel. << 656 ounces of pre-mix.
In a specific volume of 40:1 pre-mix you will have more parts per million of gasoline and less parts per million of oil.
Now shoot 40:1 pre-mixed fuel thru your carb mixed with a fixed volume of air.
The 40:1 pre-mixed fuel has more actual combustible gasoline and is now mixing with a fixed volume of air flowing thru your carb into your motor.
The air/fuel mixture has more fuel for a fixed volume of air and is now actually richer.
Your motor is jetted for 32:1 pre-mix.
Now you've now added more fuel to your pre-mix by pre-mixing 40:1. << more ppm of fuel to oil ppm.
Your jets are too large and your motor is running rich and having a hard time getting on the pipe.
Try this, turn your airscrews out 1/2 a turn and raise the clip on your needle up 1 groove and report back.
By turning your airscrews out 1/2 a turn you've added more air to your idle circuit.
By raising the clip up 1 groove you've actually lowered the needle into the needle jet and leaned out the mid-range.
I bet it'll stay idling longer and it'll get on the pipe harder.
I hope that makes sense...
Okay that makes more sense. Thank you for explaining. So basically if this is actually what my problem is coming from, sounds to me like I just wasted 5 gallons of gas and should have just kept it at 32:1 like a good boy
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Running your pre-mix 40:1 vs 32:1 is enough to require rejetting.
Now the pre-mix has more fuel ppm and less oil ppm.
The motor is now running richer even though your pre-mix is lean, fuel-oil ratio wise...
Can you help me understand a little better how that would require rejetting please. So does that mean that the more oil I put in the premix, the motor is going to run more lean? That sounds backwards to me, but I am limited in knowledge so thats why I posted here.
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are you using fresh fuel, same fuel octane, same pre-mix oil and pre-mix ratio?
Yes sir, he ran it with 93. I drained all the old gas that was out of it and put new gas in it.. The previous owner was running it 32:1 and the plugs looked pretty dark so I ran it 40:1 and the plugs are still looking the same. Im gunna have to wait and post pics of the plugs later tonight or in the morning.
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Quick update. I went to check the compression today but didnt have time to take the tank off and check the coil because I had to leave for work early, but I did check the plug caps, made sure they were real tight and then let it idle for a bit. It did idle but not that strong AND the left side is not getting nearly as hot as the right. I could keep my hand on the pipe without it burning my hand but couldnt keep my hand on the right pipe because it was too hot. Left side was sputtering during idle as well.
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Check compression. Owner after me did pop the reeds and did put new Pistons in it. Check compression and report back.
Also check pickup gap between stator and pickup coil. I have wasted a pickup before... Should be the gap of a biz card.
Check spark plug caps too.
Good luck.
Jetting is fine. Little rich but safe.
Your the man JD. thanks for the input, ill report back once I check all those things. Sounds like its nothing major.
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My gues is it wasn't put back together correctly
Idk if this has anything to do with it, idk why it would, but before this started happening (sputtering and not pulling like it should on the power band) I was in the trails about 3 miles from my house and the silencer came loose from the header and fell off, so I had to ride all the way back to the house with the silencer off the header. After I put it back on is when this issue popped up.
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I cannot comment on that.. I just got a few weeks ago. This was my third time riding it, it seemed to run well the previous 2 times I ran it. It had been sitting for the past year though according to the guy that I bought it from. But the issues that are new that I stated above ^ just started yesterday.
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The only thing that was sudden was, not pulling like it should on the powerband, which is obviously my biggest concern. Everything else (plugs, not starting well after fully warmed up) is not new.
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731 elevation
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35 mm pwks with k&n clamp ons
+4 timing
Redline dune port redline pump gas domes 4 mil 66mm blaster Pistons
SLP pipes
Elevation.. I have to look real quick and see, I'm in mid Michigan currently Clio Michigan riding. Jets I'm my sure I wanna say 155 main? Issue just started today, I might have to PM JD it's his his old whip that I bought from a guy that bought it from jd and he didn't change anything on it.
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I'm having some issues with my new ride, maybe you guys could chime in and give me your 2 cents.. ill keep it short and sweet. 1. She starts on the first kick no problem, but once warmed up, She doesn't start that well until several kicks and giving it the throttle. Sputters on the powerband and not pulling that hard once I give it more throttle (4 mil with redline port job.) idles a minute or less before she turns off. Plugs are dark and wet. 40:1 mix pump gas.
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Any pics? The link is not working
Shee ain't running right
in Jetting & Exhaust Forum
Posted
Yeah, I thought 90 psi was low. That was after 15 kicks too