Hi Folks, my oil pressure seems good but I've had a few cases where it has seemed a bit lower and then a bit later a bit higher again.
Yesterday I did a test run to check out the new primary rebuild and ran up two mountain passes and I think I have now understood the cause/effect relationship.
When climbing (higher throttle, more load and obviously front wheel higher than back) oil pressure seems to be lower than when coming back down, same revs and speed but this time lighter load and engine frequently under compression and obviously front wheel lower then rear (the passes are steep).
It was a mid 20 degree C day, the passes are narrow and windy so was not revving the crap out of it in either direction but would have been revving higher going up. I do have a thermostat in place so would expect oil temps to be similar in both directions.
When riding along on the flats, oil pressure is very much as per the "down" readings around 80 PSI above 3K but while climbing this can drop to around 70 PSI above 3k.
Not earth shattering pressures but I thought it was quite interesting and besides possible engine / oil temp differences I can't think of what would cause such a difference. Was trying to think about oil delivery in the crank under load or compression, bikes orientation, etc, but my head started to hurt.🙄😉
Anyone ever noticed something similar?
Couple pics of the run.