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Phantom Surging, air suckage
Posted: March 25th, 2008, 10:28 am
by VoR
Anyone experience this before? I'm just trying to get some ideas as to where to start my search.
Just rebuilt the top end and everything was great at home. Started her three times and everything seemed fine. Got out to Superstition this weekend and after a short time it started to surge at idle like it was lean. Did not seem to effect anything other than idle.
I'm going to start with some carb cleaner spray on the boot to see if there's a crack there.
The only change I've made is running 927 vs Super M.
I'm hoping its not in the case somewhere
Posted: March 25th, 2008, 10:32 am
by britincali
They will surge when they are running too hot also.
Posted: March 25th, 2008, 11:00 am
by VoR
It was very hot this weekend, but I'm pretty sure it was doing it right after starting her in the AM...
Posted: March 25th, 2008, 11:16 am
by lewisclan
pilot jet ! where was your mixture screw?
Posted: March 25th, 2008, 10:25 pm
by TYSTYX
lewisclan wrote:pilot jet ! where was your mixture screw?
+1
Posted: March 25th, 2008, 10:30 pm
by Ported&Polished
main bearing seal
Posted: March 25th, 2008, 10:56 pm
by iggys-amsoil
Ya check that to be sure.
Its a big change from SD to Superstition in air temp and Humid.
In my case I rode Perris this last weds, and Sunday. Weds I had a little surging. The air temp was cooler than Sunday. Sunday was about 10* hotter and the air was a lot dryer because of a slight Santa Ana wind. However I had NO surging at all on Sunday and I didn't change a thing.
Also turn the mix screw in, even down to half a turn, if it goes away at less than half a turn richen the pilot.
Posted: March 26th, 2008, 7:41 am
by VoR
Thanks for the input, I'll have to mess with the screw.
I forgot to mention this in my first post, but when putting the top end back together I did notice one of my reeds was not closing 100%. There was a gap of about 1 mm. And when I got home last night I noticed I do have a slow oil leak...seems to be coming from the oil seal behind the sprocket
Could it suck air from there? Never been inside the bottom end
Posted: March 26th, 2008, 9:41 am
by lewisclan
cant suck through that seal, but you need to get those reeds changed before your next ride
Posted: March 26th, 2008, 9:55 am
by Caseys500
VoR wrote:Never been inside the bottom end
Nor do you have to go there to change that seal. You can just pull it out once you remove your sprocket. I had to take mine out piece by piece until I could get the collar out. Then the rest of it came right out. I think it is like a $6-$8 part and saves a lot of mess. If the collar is groved then get a new one of those...I think it is like $12.
Posted: March 26th, 2008, 9:56 am
by britincali
The countershaft weeps on both my bikes, I consider it an auto lube for the chain
Posted: March 26th, 2008, 4:57 pm
by ou812
The countershaft weeps on both my bikes, I consider it an auto lube for the chain
See now thats some serious home brew R&D happening right there!
Posted: March 26th, 2008, 9:43 pm
by 4Z
ou812 wrote:The countershaft weeps on both my bikes, I consider it an auto lube for the chain
See now thats some serious home brew R&D happening right there!
Indeed!!
Posted: March 27th, 2008, 2:41 am
by iggys-amsoil
ou812 wrote:The countershaft weeps on both my bikes, I consider it an auto lube for the chain
See now thats some serious home brew R&D happening right there!
Didn't Harley invent that years ago?
Posted: March 27th, 2008, 1:50 pm
by kkvslayer
Did You Tourqe your base studs? a base gasket leak could also cause surging.