te450 coolant temp sensor in the cylinder, can I add one!

I'm riding with two other 450 guys,who's bikes both came with fans. I have a fan to add but i really want to install the OEM temp sensor intop the cylinder without removing it. ( Don't need any top-end work right now).

Somebody with good knowledge ..... can I drill and tap a new hole in the cylider side...,(I see a casting boss on my cylinder), where Husky installs it.

Specifically, is there enough space within the water jacket area to allow me to use a standard "3 tap set". ( tapered, plug and bottoming)

Last, what thread size is the temp sensor. ( haven't ordered it yet...).
Thanks guys, Dave

I really doubt you would have enough clearance to tap the cylinder wall for temp sensor.
A much easier route is to install the sensor in the radiator.

A Trail-Tech Vector from Motorsportz will come with a temp pickup for the radiator hose. Very easy to install.

Yes, I have the Trail-Tech Vapor with the "hose" temp sensor and I like it but it's not suitable to operate the Husky fan. It's just a thermocouple, or RTD, I dunno which. The fan requres a switch...like a bi-metalic switch that in turn operates a relay to power the fan.

Anybody, while they had the cylinder off, looked into the water jacket at the temp sensor?


Dave

Oooo, I see what your getting at. Buy the sensor and thread/tap a hole in, say a Uptite aluminum "Y" piece.

Hmm, wonder if that part has sufficient wall thickness to do that?

Hmmm.
Dave

I didn't read your post well enough, I guess I was in too big of a hurry this morning. I now understand what you are after.
It does seem like the boss in the casting would be there for just such a purpose. The fitting on my 610 appears to be 1/4" NPT, but it is hard to say for sure without removing it.
Is there room to put another fitting in a hose similar to the Trail Tech fitting?

Or you can do this.

yeah Hammer,
I was thinking just that as well. Is that the stock Husky temp. senser....maybe from a 450?

Did you do that mod or is it OEM on a 510 or 610 ?

If you did it, did you use the Husky relay too to power the fan

Thanks for your help !
Dave

Edit: oh crud, forgot to ask, if you knew what size thread the senser is. 1/4" NPT?

The metric pipe thread that is very common is British Pipe. It is so close that most times they are interchangeable. At least in my experience. In my previous post I should have said "it looks like 1/4" BP". I thought about it later and almost edited the post but it was too late.
After looking closer at the fitting on the 610 today, I don't think it is pipe thread. So I looked at the Halls on line catalog and it appears that the p/n is 8000 BO385 and it uses a gasket. Since pipe fittings don't it must be another thread. Probably time to call George or someone else who will know.

I've got a Husky thermo-switch, gasket and relay coming for the 450, ( in stock at Hall's, ..... nice).
I haven't decided where to put the switch just yet.

dave

The parts came quckly from Hall's, ... (two days....thanks Halls), and I checked the Husky temp switch threads are 10mm x 1.25 pitch. Straight threads with a o-ring for a gasket. It'll require a bit more than just drilling a hole and tapping it .... needs a shallow groove to retain the o-ring.