first run on new pipes and pods

[Overboost]

ok, heres the deal..

 

have to rev it to get it to move from idle, not high, just dont take off smooth.

 

second,

 

once your moving, say, 15 MPH you gun it, it bogs (hesitates) and then rips ass, fast.

 

third,

 

if your 3/4 throttle, you pin it, it hesitates for a second, then just roars....

 

forth,

 

if you just cruise, and are around half throttle or less, it like labors the engine, then it takes off like you just hit the throttle but you dont move it. its like it loads up, runs the extra gas out and then speeds up.

 

any input?

 

I have 320 jets, 27.5 pilots, longer needles on middle clip (of 6) 1200' elevation 45-55 degrees

 

it is like it has this hesitation throughout the power band, once you get past it, about 2 seconds, it just flys. and its rich..puffs black smoke every time it does this, plugs have a black ring around the electrode when chop is done.

 

I jetted it down to 300 and 25 pilot

 

[AKheathen]

lean out the oil a bit, and go back up. those are clasic lean symptoms. the smoke is from too much oil

[Overboost]

oh yea, thats what I forgot to add,

 

oil was mixed at 40:1 with yamalube 2R oil

 

I mixed it richer than the usual 32:1 I run because it was colder out, I didnt want it to run lean.

 

also, when just at idle, if you run it and pull the plugs, they are wet with gas....

 

if you run it hard, they are dry, I ran it WFO shut her down and pulled plugs, gave em a chop and they had the black ring.

 

WFO on the GPS it topped out at 72.1 MPH with a 15 tooth sprocket.

dont know if that is slow, fast or average, but it beat my friends DS 650 with a KN, exhaust, CDI and 14 tooth sprocket. beat him out of the hole, down the road and when I let him get 3 lengths or so ahead, I would catch and pass him around the top of 5th

[AKheathen]

actually you run less oil in the cold, because it doesn't really atomize and burn off as much as the summer. pretty good to beat out the 650 ds. 72mph, on a 15- you must be running 18's?

[Overboost]

tires are 20's

 

and no matter how much I stayed in the throttle, it would not go over 72.1

 

his on his GPS hit 66.7 and he was also on 20's, he is going to 22 tires, and I was going to a 13 tooth but I think my 15 is fine for me.

 

would dropping a clip on the needle help?

 

I have no problems except when at part throttle, and the pin it. as long as you keep in it, it is great, you let it cruise or idle, it loads up so to speak.

 

that is why I dropped the jetting. I dont want to go leaner on oil, I thought the 40:1 was a bit too lean for yamalube. I dont want to go 50:1, thats what my snow blower runs. big difference.

 

I normally run 32:1 ratio and never have a problem. but that was with stock pipes and box. it ran great then, I did nothing else excpet change out the pipes, filters and jet it from 210 and 25 pilots to the current 320 and 27.5, thats it, it never did this before hand.

 

so it must be in the jetting somewhere, just need to find that happy medium now.

[AKheathen]

think of it this way, your jetting ratio is 2:3 from then, till now. so now, @ 32:1 with the new jets, you are like running 20:1 on the previous. 48:1 would be the same amount of oil as you were running before @ 32:1. i pretty much guage the oil mix by the smoke, but i double checked by how much oil is actually in the juggs. dropping th needle will help the low-mid throttle, but you are having lean problems up top. mix some fresh 40:1 and try again. running less oil will richen up the fuel, too.

[Overboost]

that is what I was running, 40:1 with yamalube R2

 

I ran 32:1 on my old stock setup.

 

so your saying go back up in jetting to my 320, and mix my gas to about 48:1 ??

 

I am having this issue at lower speeds and off idle, it does do it up top but not near as much as idle to mid

 

once it gets going it runs great, just hesitates down low. no backfires or anything, but it does smoke when it is warm while idling, it didnt do that before.

it only smoked when you first start it, then got warm and would quit, now it smokes when you start it, and tapers off when warm, but still smokes a bit at 180 degrees

 

I will jet back up to the 320 and remix some gas @40:1 to be sure

 

I mixed 16OZ to 5 gal if that helps.

 

EDIT:

 

I found this little mix calculator on the net. just though it was kinda neat

http://www.csgnetwork.com/oilfuelcalc.html

Edited April 5, 2009 by Overboost

[black sunshine]

32:1 OR 40:1 is fine. Too much oil is not your problem. You don't solve a "lean" issue by changing your oil ratio, it is a fuel/air problem.

 

If it isn't too much trouble, how are you doing your plug chops?

 

Once you've nailed that, try leaning your clip position, this is probably causing your bog.

 

 

[robert0762]

Check for air leaks. Mine was doing the same thing and I had a peice of one of my intake gaskets missing So it was lean no matter how much I jetted up

Edited April 5, 2009 by robert0762

[Overboost]

I am doing my chops on brand new plugs running WFO, warming on older ones. cutting them with a dremel

 

I did change my needles back to stock. I had aftermarket ones in there that were about 1/4" longer and the taper was different.

I switched back to stock needles and it seems to run much better off idle. I wont know that this helped until I can get it back on the trails next weekend and run her WFO again. flint tends to frown on people running quads at 70MPH on the roads around here.

I have been testing on my side yard, I dont get out of first but it has a much better low response. I can putt around and it dont bog or buck around.

I jetted it back up to the 320/27.5 until I can verify the needles were not the issue. I cant see it wanting a bigger jet, but I guess every bike is different.

Edited April 5, 2009 by Overboost