For most customers I do not recommend the bypass valve.
Here is my opinion and some info about the valves.
The Jagg by-pass valve directs the oil away from the cooler when you are riding in cold temperatures. It does not shut the oil off going to the cooler, but opens a passage of less resistance for the oil to travel, thus bypassing the cooler.
If you ride in very cold weather and you don't let your engine warm up properly, I recommend a bypass valve.
I would not recommend a bypass valve unless you do a lot of your riding in cold temps. I put a strip of duct tape on the oil cooler guard if I want to block the air getting to it, if I find myself in very cold weather.
You can always add the valve to your bike later if you find that you need it.
I would make more money if I pushed them. I really don't want to sell something that is not right for my customers.
• As far as riding in cold weather…
• Summer oil 20W-50
• Winter oil 10W-40
Manufacturers want the engine to run above 200 degrees F. This is simply to boil off any moisture. If you ride in cold temps (with the right viscosity oil) and your engine didn’t get above 200F, it will not hurt your engine.
Only when you do this day in and day out, the condensation / moisture may do damage.
So a long rides with a few cold spells will not be a problem.
