buzzword
XS650 Addict
More educated minds here might disagree, but unless you’ve got oil flow issues, that doesn’t seem terribly hot to me on an air cooled bike. What is the shear temperature for the oil you are using? Is the bike detonating or noticeably losing power at any RPM range? Is it using an abnormal amount of oil? Are you getting oily smoke through your exhaust? Are you noticing any metal flakes, glitter, or shaving on your sump plugs when you change your oil?Took it for a 30 minute ride today to see how hot the bike gets and this was the result:
View attachment 170892
115C at its highest which is 239F. Kinda makes me want to install an oil cooler. It took a long time to get that hot and then the clutch started to slip a bit. Other than that it was a nice ride.
If the answer to the latter of these is “no” then I’d probably run it until something presents actual symptoms. The problem with those dipsticks is they don’t present an acceptable temp range, and even if they did, that might vary based on any number of factors. So you can worry all you want about it, but I’d lightly suggest finding out the shear temp - or the temperature at which your oil loses lubricity + becomes a liability rather than an asset to the system - and use that as a first step toward establishing a threshold for concern.
Too long, didn’t read? Here’s two points of consideration:
1. 239F is likely not “too high” from an oil temp perspective on an air cooled engine with not much blocking the breeze.
2. More data is not always helpful without context.