Posted February 07, 2001 - 04:07 AM
Thanks in advance,
Posted February 07, 2001 - 08:18 PM
EKN#3,#168main,#45pilot,#100air, 1 3/4turns out,open air box,open s/s header&silencer,clean filter and fresh plugs. This set up works excelent on my bike but not johns, after more experimentation thismorning we went to a #178 main and fresh plug the first run was excelent hauled ass at WOT, turned around and opend it up again got to about1/2 throttle in 3rd and power died again.It seems like it needs the richer main but is then to rich in the low to mid throttle fouling the plug enough to prevent a good spark at the leaner WOT.I am thinking about going back to a #42pilot,back off the pilot screw 1/2-1/4 turn,drop the needle to clip #1 and maybe a #175main, would this be too lean in the lower throttle with the EKN, Am I on the right track if not let me know.Thanks mate,
Posted February 08, 2001 - 03:56 PM
All/any feedback is much apreciated,thankyou.
[This message has been edited by Andrew in OZ (edited 02-08-2001).]
Posted February 08, 2001 - 05:34 PM
The top clip should be too far lean at 1/4-1/2 throttle. This REALLY sounds like something else has a problem other than normal settings.
Has the nozzle come loose in the carb?? The nozzle can sometimes loosen and lower when pulling out the main jet. Is there any possibility it is resting lower? Inspect things carefully. make sure the main air jet is not clogged.
A leaner needle option is EVN, but look elsewhere first. Go back to stock jetting if you must.
[This message has been edited by James Dean (edited 02-08-2001).]
Posted February 10, 2001 - 02:05 AM
Totaly cleaned the carb, blew out all jets & passages checked needle&seat and float level, installed Ekn#3,#170main,#45pilot#100air,1 1/2 turns out and went for a ride, it started 2nd kick no choke or priming, there is a slight power drop around 1/8-1/4 throttle,from 1/4-3/4 is reasonably good(felt stronger&more responsive before in #2clip pos) from 3/4 to WOT is still stumbling?/missing it is more noticeable in the lower gears, 3rd gets to 110km/h, 4th 130km/h then it feels like it's run out of fuel 5th is good till aprox 145km/h then power drops off, speed still picks up but very slowly to around 160km/h, when stock with only exhaust mods it did around 165km/h. so we put the #178 back in and no other changes, there did not seem to be any difference in performance but out the exhaust and around the spark plug was a lot more carbon, the insulator? was dark tan but not black, this indicates to me that the #178 may be too big. I also noticed that at idle the pilot screw had no efect until it was turned out aprox 2 1/2 turns, should'nt it stall when turned all the way in? should i change pilot jet to a #42 or #48?I think #2clip pos is the best mid range it's had would this be OK not too lean? Should he get the ignition system checked for the WOT miss? THANKS FOR YOUR HELP
P.S. what are the std jetting specs for "01"YZF should I start at these settings?
[This message has been edited by Andrew in OZ (edited 02-10-2001).]
Posted February 10, 2001 - 12:36 PM
You may still want to try a #162 or #165 main (same as YZ stock). Are you using the same air filter oil?
The #45 pilot at 1 1/2 to 2 1/4 turns is acceptable. (YZ uses #42 and EJP#4, close to EKN#4)
Considering your bikes are identical including jetting the electrical sytem is suspect. You may also want to go back to stock to confirm that the problem is still present.
Hope it gets resolved soon.
Posted February 11, 2001 - 01:40 PM
EKN#3,#168main,#45pilot#100air,1 3/4turns. I'll let you know how we go with the sparky otherwise thanks for your time & help.
Posted February 11, 2001 - 02:11 PM
Posted February 11, 2001 - 09:53 PM
Your very first post said you tried a smaller main jet, what size?
Good luck getting it sorted out.
Posted February 12, 2001 - 03:49 AM
when changing needles ie. from K to N, how much does it affect the fuel screw?
My carb is a FCR'98, I was running YZ timed, de-oct'd, 100 airjet, 48 pilot, 165 main, EKP-3, 2turns. I worked great but here in old Blighty the weather had taken a turn for the worse so I tried the EKN-4 1.5 turns which just stummbled and spluttered, I then went back to Clip 3 and 1.25 turns the spluttering stopped but have since fouled a plug, (the first time for 10months), It looks to me like the change from K to N is more than 1 turns on the fuel screw. Also what are the max and min amount of turns on the fuel screw? Thanks in advance for any pearls of wisdom.
Posted February 12, 2001 - 08:37 AM
If you and your buddy have the same carb/bike have you swapped carbs/tps sensors? does this still cause a stumble at WOT.
Posted February 12, 2001 - 12:33 PM
you've blagged andrew from oz's thread. slapped wrist. i've not been able to say this before because i come from 'old blighty' as well.
we are experiencing low pressure streams from western europe.
you've jetted up when the pressure went down. possibly went the wrong way!
JD is our jetting guru. he may help.
Posted February 12, 2001 - 04:28 PM
Don't go past 1 turn on the pilot (fuel) screw using a #48 pilot jet, unless it really needs it. There is a high risk of fouling plugs. I think you were on the edge in both cases and it was just a matter of time. Go in 1/2 turn and give it a try.
Posted February 12, 2001 - 06:32 PM
Posted February 14, 2001 - 02:07 PM
Taffy,JAMES MJ's tried were #160,#162,#165,#168,#170 & #178
AhamayWR426, swaping carbs over was actualy the first thing we tried with no afect which is why we thought the bike just needed to be jetted differently,so that cancels out the TPS, THANKS!!
Posted February 14, 2001 - 07:46 PM
Thanks for the update.
Getting back to your plug checks it sounded like the 172 was slightly rich. Did it not perform as well as the 168?
Posted February 15, 2001 - 02:02 AM
Plug readings were as follows #162-white, #165-very light tan,#168-medium tan,#170-dark tan with a "whisp" of black,with the #170 the miss felt smoother (did not seem to hit as hard) I think with the #168 the power is building up faster when the rev limiter cuts in making it more noticeable.We are also using shell optimax unleaded(98) which has an octane rating aprox 2 points higher than premium unleaded(95-96) / 5-6 points higher than standard unleaded(92-93),From memory it was the higher the octane the richer the fuel, If I was using premium fuel the #170 would probably be the right jet to use. Ive been looking at the VORTEX ignition does any one know of any problems or downfalls with it?, sounds like it would be the perfect match for YZ timing and "E" series needle!
Posted February 15, 2001 - 09:04 PM
[This message has been edited by Clark Mason (edited 02-15-2001).]
Posted February 16, 2001 - 02:34 AM
Thanks for the info, I'll be looking for one tomorow, they should'nt be hard to find here in Australia. Have you used any of the vortex tuners tools? aparently the ETK(Engine Tuners Kit) can be used to adjust ignition curves and rev limiter on other CDI's. Hmmm... might need one in the tool box
Do you have any instalation or adjustment tips?
[This message has been edited by Andrew in OZ (edited 02-16-2001).]
[This message has been edited by Andrew in OZ (edited 02-16-2001).]