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TOPIC: Re:Oil Pressure Spec
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Oil Pressure Spec 1 Year ago
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Test drove an Harley Road Glide 2 weeks ago and I noticed that the oil pressure was around 15 psi. at idle and went up to around 30 psi. at speed. Seems very low to me. Got me to wonder what is the normal oil pressure at idle and at speed for the Roadstar? I can see why Harley's have engine issues if they idle alot.
Vinnie |
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greenpus (User)
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Re:Oil Pressure Spec 1 Year ago
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I have 20w-50 oil and when my bike is hot at 60 mph its around 45 psi and and less then 5 psi at idle.
Cold it's around 80psi/60psi |
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Last Edit: 2012/05/03 17:10 By greenpus.
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Re:Oil Pressure Spec 1 Year ago
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greenpus wrote:
I have 20w-50 oil and when my bike is hot at 60 mph its around 45 psi and and less then 5 psi at idle.
Cold it's around 80psi/60psi
Both of mine are the same as yours ...i doubt they really are below 5psi hot,likely the gauge just is not sensitive at lower pressures... 
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greenpus (User)
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Re:Oil Pressure Spec 1 Year ago
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nightstar57 wrote:
greenpus wrote:
I have 20w-50 oil and when my bike is hot at 60 mph its around 45 psi and and less then 5 psi at idle.
Cold it's around 80psi/60psi
Both of mine are the same as yours ...i doubt they really are below 5psi hot,likely the gauge just is not sensitive at lower pressures... [jpg[/img]
it's hard for me to read my gauge at that low level. I think it's somewhere between 5-8 psi 
the yama manuals says it should be at 8.5 psi at 900rpm idle when hot
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Last Edit: 2012/05/03 18:17 By greenpus.
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Re:Oil Pressure Spec 11 Months ago
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Just installed Shane's gauge on my '07. Gettin' 72psi@75mph and 15psi@idle.
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Re:Oil Pressure Spec 11 Months ago
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My bike runs at 75 PSI when cold but when the oil temperature gets too about 210 it drops to 15 psi at Idol and 50 psi at 75 80 90 or 120 |
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Keep The Speedometer Side
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Re:Oil Pressure Spec 11 Months ago
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I think the old '10psi per 1000rpm' can apply here. So long as you don't lose pressure in the big end (upper rpm) you should be okay |
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Re:Oil Pressure Spec 10 Months, 4 Weeks ago
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Remember, that's 8.5 psi "at the manual" at 900 RPM. If you are not setting your idle with a tach, you could be idling a hot motor with dangerously low oil pressure.
85PSI for the relief valve is plenty of room on top!
$0.02 |
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Re:Oil Pressure Spec 10 Months, 4 Weeks ago
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On my idling at 900 RPM and when hot I get 15 psi now that's coming from the oil pressure testing port I now if your running your gage from your oil port at the barrel you get a lower reading |
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