Hi Taffy,
I thought you might of know this one my old mucker, if the idle hangs high before coming to rest the idle mixutre is to lean, if the idle drops below normal then rises the mixture is to rich.
Regards
Sparks.
I thought you might of know this one my old mucker, if the idle hangs high before coming to rest the idle mixutre is to lean, if the idle drops below normal then rises the mixture is to rich.
Regards
Sparks.
Joined Dec 2005
1K Posts | 0+
australia
Hi Taffy,
This is the classic sign of leanness hovers above true idle for one to two seconds then drops to true idle but if to lean my not idle smoothly.
Sounds like some thing is set to lean or pulling air or partial blockage on the pilot circuit.
Is this on your FCR carb?.
Regards
Sparks.
This is the classic sign of leanness hovers above true idle for one to two seconds then drops to true idle but if to lean my not idle smoothly.
Sounds like some thing is set to lean or pulling air or partial blockage on the pilot circuit.
Is this on your FCR carb?.
Regards
Sparks.
Ah the Dellorto i'm still on medication after working on those, how long did it take to kick the pills or are you still on them? LOL
The Principal should be the same for any make type of carb, has this problem just occurred?.
Excuse my ignorance with abbreviations but what is WOT
Regards
Sparks.
The Principal should be the same for any make type of carb, has this problem just occurred?.
Excuse my ignorance with abbreviations but what is WOT
Regards
Sparks.
Joined Nov 2001
17K Posts | 774+
Ely, England
wide open throttle
that means it should run lean and it ran fun, coughs a little at lower revs if i'm nice to it so i figured rich. were you with me?
dell ortos can be sorted. i didn't have the nerve to experiment with a DR272 in my little 400 and then a year later i got the info that that was the way to go. thought that my jetting with the leaner DR266 was still good though.
if i didn't know better i'd say it was the advance curve settling down a second or two later and that's your 'country'!
regards
Taffy
that means it should run lean and it ran fun, coughs a little at lower revs if i'm nice to it so i figured rich. were you with me?
dell ortos can be sorted. i didn't have the nerve to experiment with a DR272 in my little 400 and then a year later i got the info that that was the way to go. thought that my jetting with the leaner DR266 was still good though.
if i didn't know better i'd say it was the advance curve settling down a second or two later and that's your 'country'!
regards
Taffy
Ditto, a similar version on my 501, went to FCR and sorted. Could never get the flaot level right and that may be a factor.
Steve
Steve
Joined Oct 2004
350 Posts | 1+
Yellowknife, NT Canada
I'll throw in on this one.
My 06 spankin new 650 does just what you describe Taffy - blip the throttle and it comes right down (doesn't hang like it is lean) in about 2-3 seconds it drops to a slightly lower and steady idle.
I am running Dale's jet kit as he recommends but with the AP still connected and TPS disconnected.
48p/DL#4/150m/FS 1 1/2 turns and AAS to Dale's recommended setting...
It starts without choke hot and cold and pulls well throughout - I have chased air leaks but found nothing so far. The idle once settled down is steady so I really didn't expect to find any leaks.
I am at 1000ft and 70F low humidity on using it as foof street bike
It runs fine but I dislike the dual idle speed quirk....
Cheers
Mark
My 06 spankin new 650 does just what you describe Taffy - blip the throttle and it comes right down (doesn't hang like it is lean) in about 2-3 seconds it drops to a slightly lower and steady idle.
I am running Dale's jet kit as he recommends but with the AP still connected and TPS disconnected.
48p/DL#4/150m/FS 1 1/2 turns and AAS to Dale's recommended setting...
It starts without choke hot and cold and pulls well throughout - I have chased air leaks but found nothing so far. The idle once settled down is steady so I really didn't expect to find any leaks.
I am at 1000ft and 70F low humidity on using it as foof street bike
It runs fine but I dislike the dual idle speed quirk....
Cheers
Mark
Joined Nov 2001
17K Posts | 774+
Ely, England
cheers all
simon it has a 190MJ, 40 pilot and i haven't checked the needle code as i wasn't wearing my glasses!!! but it'll be OEM and it's on C3/5.
the air screw, is it an air bleed as i suspect it is or an ebrichening circuit?
i think it's something to do with the ignition advance change but the casue may be jetting!
regards
Taffy
simon it has a 190MJ, 40 pilot and i haven't checked the needle code as i wasn't wearing my glasses!!! but it'll be OEM and it's on C3/5.
the air screw, is it an air bleed as i suspect it is or an ebrichening circuit?
i think it's something to do with the ignition advance change but the casue may be jetting!
regards
Taffy
Joined Jun 2001
1K Posts | 3+
Berkshire, England
Taffy,
that pretty much looks like it's the stock jetting although I would suggest a 35 or max a 38 idle jet. The 40 is on the big side.
To be sure it's worth checking the needle and needle jet are K51 and DR272.
The screw is an air screw not fuel screw on idle adjustment.
Otherwise you may well be right on the ignition although I have experienced a similar two stage idle problem due to slightly stretched cam chain.
Cheers,
Simon
that pretty much looks like it's the stock jetting although I would suggest a 35 or max a 38 idle jet. The 40 is on the big side.
To be sure it's worth checking the needle and needle jet are K51 and DR272.
The screw is an air screw not fuel screw on idle adjustment.
Otherwise you may well be right on the ignition although I have experienced a similar two stage idle problem due to slightly stretched cam chain.
Cheers,
Simon
Joined Nov 2001
17K Posts | 774+
Ely, England
it has a DR272 simon and i have to confess i didn't return to the bike to check the needle cods. i was there to clean the carb as much as anything...
i note that a 35PJ was standard and that this has been changed to a 40 to get it running.
BTW simon i jetted scoots 470S anfd they weave like buggery! sat on the tank and it helped. guess the rear ride height is vital yes?
regards
Taffy
i note that a 35PJ was standard and that this has been changed to a 40 to get it running.
BTW simon i jetted scoots 470S anfd they weave like buggery! sat on the tank and it helped. guess the rear ride height is vital yes?
regards
Taffy
Joined Nov 2001
17K Posts | 774+
Ely, England
well i tried the 35PJ this morning and it ran sweet. the PS could have been fine anywhere betweeon zero and 3 out it seemed so the pull is now sorted and it's silk smooth.
however i still have this two-stage idle and after chatting to gary grover it was suggested that i carry out a test by removing the blue/white to white from the coil to keep just one advance curve. i was 100% sure this would be the cure but it wasn't!!!!!
anyway, it starts first time warm and about 5 when cold so that'll do for now.
regards
Taffy
however i still have this two-stage idle and after chatting to gary grover it was suggested that i carry out a test by removing the blue/white to white from the coil to keep just one advance curve. i was 100% sure this would be the cure but it wasn't!!!!!
anyway, it starts first time warm and about 5 when cold so that'll do for now.
regards
Taffy
Joined Jun 2001
1K Posts | 3+
Berkshire, England
Taffy said:
Absolutely, the rear suspension is the most important in getting rid of the front end instability on these. Most come out of the factory with far too much rebound damping on the rear shock as well and just a few clicks helps the front a great deal.
Cheers,
Simon
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