Running warmer, running cooler

[Venturous Randy]

This past summer I noticed on several ocassions that my temps were going up a little quicker than in the past when it was hot. A couple of years ago I did the bikini side panel mod and it seems to have helped in keeping the bike cool. This was even the case when I was pulling a 450 pound camper.

Wednesday I took the bike to work with the morning temp being about 40 degrees to be able to ride home home with it 70 degrees. In my morning ride the temp gage never got off the bottom. Normally it would still go up to about 1/3 on the gauge for that distance.

Well, I finally got down under the bike and discovered that when I pulled the engine to replace the gearset, I must not have set the bypass to the correct position. It normally has the top of the lettering pointing toward the five oclock position. I was 180 degrees off. I rotated it around and took a short ride and the temp gage went up to about 1/3.

It is easy to understand the temp staying low during cold weather, but I suspect that the getting warmer quicker during hot weather was due to the coolant going thru the radiator too quick to cool adaquate.

RandyA

[Condor]

Well, I finally got down under the bike and discovered that when I pulled the engine to replace the gearset, I must not have set the bypass to the correct position. It normally has the top of the lettering pointing toward the five oclock position. I was 180 degrees off. I rotated it around and took a short ride and the temp gage went up to about 1/3.

 

Thanks for the explanation as to where that thing should be set Randy. There has been a lot of posts to the effect that it needs to be set 'on', but I've never seen...until now... anything that explained where ON was. Maybe there has been other posts, but I haven't seen them... I can't believe Yamaha didn't put some sort of arrow and on/off labels on the housing.

[Venturous Randy]

You are welcome condor. I took about a 60 mile ride on it today and it stayed between 1/3 and 1/2 on the gage and the bike ran great. I saw temps on my thermometer up to 68 degrees so it was still a cool day. I just wish I had got down and looked at it this summer when it was so hot.

RandyA