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9th August 2012
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Know It All
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Join Date: Jul 2012
Location: Victoria
Posts: 154 Sportster/Buell Model: XL 883 Sportster/Buell Year: 1994
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So,detonation is combustion before the spark? But caused by compression like in a diesel?
sorry..i am a newb...,but you gotta start somewhere...
Here are some samples of my bike starting cold and running..(I thought it might "talk" to some of the more experienced ears...
Thanks Kindly.
AWOL.
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9th August 2012
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The crazy one...
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Join Date: Mar 2006
Location: Heatville
Posts: 2,517 Sportster/Buell Model: rigid 88" highly modified Sportster/Buell Year: '03 Sportster/Buell Model #2: iforgot Sportster/Buell Year #2: 80's Other Motorcycle Model: crs Other Motorcycle Year: 80's
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Quote:
Originally Posted by awol70
So,detonation is combustion before the spark? But caused by compression like in a diesel?
sorry..i am a newb...,but you gotta start somewhere...
Here are some samples of my bike starting cold and running..(I thought it might "talk" to some of the more experienced ears...
Thanks Kindly.
AWOL.
Cold start to idle 94 sportster XL - YouTube |
If that's how it idles after fully warmed, you need to speed-up the idle. It should idle around 1000 RPM.
That sound's more around 700 rpm; much too slow. It needs the rpm's for proper engine lubrication. You might want to check the jetting. The PO may have jetted incorrectly. Oil tank temperatures will fluctuate depending on ambient air temps. Look for 180F-220F. I run much hotter so switched to synthetic to help with high temps.
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9th August 2012
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Know It All
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Join Date: Jul 2012
Location: Victoria
Posts: 154 Sportster/Buell Model: XL 883 Sportster/Buell Year: 1994
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actually,the idle does pick up after a little riding.
This was a cold start..in hindsight , I guess i should have included a "fully warmed' clip..
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9th August 2012
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Land Speed Record
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Join Date: Dec 2009
Posts: 701 Sportster/Buell Model: XL1200R Sportster/Buell Year: 2004
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Looks like your butterflies are backwards. They looked like they were closing when you revved the engine.
+1 on the idle speed. Way low
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9th August 2012
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Master Bike Builder
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Join Date: Apr 2012
Location: Mojave Desert
Posts: 2,047 Sportster/Buell Model: 1200S Sportster/Buell Year: 2002 Sportster/Buell Model #2: XLH883 Sportster/Buell Year #2: 2003 Other Motorcycle Model: Triumph Bonneville Other Motorcycle Year: 2012
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Quote:
Originally Posted by awol70
actually,the idle does pick up after a little riding.
This was a cold start..in hindsight , I guess i should have included a "fully warmed' clip..
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Yes, the idle is low, especially for the air mixture
What is the idle/pilot jet? If a 42, try a 45. |
9th August 2012
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Chief Harley Engineer
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Join Date: Apr 2012
Posts: 525 Sportster/Buell Model: XLH 883 Sportster/Buell Year: 1991
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Love the paint on that tank.
I would think if your oil is hot enough to melt plastic, you'd smell it for sure and if you took the cap off there may even be smoke!
My bike runs about 180 here in Southern California, but I'm right on the ocean.
What kind of funky oil routing is going on? I don't think my 1991 has those "T' and "L" fittings, seems needlessly complicated and more places to leak.
John
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9th August 2012
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Land Speed Record
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Join Date: Mar 2009
Location: Santa Cruz Mountains
Posts: 738 Sportster/Buell Model: XLH1200 Sportster/Buell Year: 1995 Sportster/Buell Model #2: S3T Thunderbolt Sportster/Buell Year #2: 2000
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Quote:
Originally Posted by John Harper
Love the paint on that tank.
I would think if your oil is hot enough to melt plastic, you'd smell it for sure and if you took the cap off there may even be smoke!
My bike runs about 180 here in Southern California, but I'm right on the ocean.
What kind of funky oil routing is going on? I don't think my 1991 has those "T' and "L" fittings, seems needlessly complicated and more places to leak.
John
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My 95 has those fittings. They have rubbed a hole in 2 of my oil lines too. They do not look melted though and I know the last few months we have had some pretty hot days here and my engine was getting really warm. I don't have a temp gauge, so I cannot guess the temp.
__________________
"...Dumb all over, A little ugly on the side... "...Frank Zappa...
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9th August 2012
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Know It All
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Join Date: Jul 2012
Location: Victoria
Posts: 154 Sportster/Buell Model: XL 883 Sportster/Buell Year: 1994
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Quote:
Originally Posted by John Harper
Love the paint on that tank.
I would think if your oil is hot enough to melt plastic, you'd smell it for sure and if you took the cap off there may even be smoke!
My bike runs about 180 here in Southern California, but I'm right on the ocean.
What kind of funky oil routing is going on? I don't think my 1991 has those "T' and "L" fittings, seems needlessly complicated and more places to leak.
John
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this is located right where the drain tube butts up against the frame.. |
9th August 2012
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Master Mechanic
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Join Date: May 2005
Posts: 299 Sportster/Buell Model: Sportster Delux 883/1200 Sportster/Buell Year: 1988
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You can get a brass reducing tee here:
http://www.fastfittings.com/product/32352
They can be hard to find. This doesn't have the twist yours does, but it'll do. Do not get the one at Home Depot; it is meant for PEX tubing and will be too small.
But you need to get to the source of the problem too. Get a thermometer oil cap and start from there. Maybe it's just that the hoses are not the proper length or not routed well and are stressing the tee. |
9th August 2012
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Master Bike Builder
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Join Date: Apr 2012
Location: Mojave Desert
Posts: 2,047 Sportster/Buell Model: 1200S Sportster/Buell Year: 2002 Sportster/Buell Model #2: XLH883 Sportster/Buell Year #2: 2003 Other Motorcycle Model: Triumph Bonneville Other Motorcycle Year: 2012
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Quote:
Originally Posted by John Harper
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My bike runs about 180 here in Southern California, but I'm right on the ocean...
John
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A well jetted motor should not see oil temp above 230 F.
Then, only for parade duty.
I occasionally saw 215 F, 40 miles from the ocean, pulling a long grade at high speed.
Mostly about 185 F, one valley in from the ocean. |
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