You would need a fitting but as long as you tied on the engine side of your thermostat it would be the same difference really. You might want a valve to shut off the flow.
M5
M5
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Partially installed on a KTM XCW...On the top end I'm going behind the bars, between clamps with two 45 degree brass elbow barbs. The inlet and outlet will both angle downwards. I'm thinking the fittings could angle off to either the left or right then spiral loop both flex hoses as a pair around the front of the steering column, behind the headlight mask to the opposite side, where both hoses will tuck behind the radiator to and route downward to their respective connections below. This way the hoses will do a spiral on their way down making them more naturally flexible. Trying to avoid restricting my steering action as I plan to leave the whole set up installed all year long (hand heat for those colder, wet fall days as well).
The alternative to this would be to flex one hose to the left and one to the right but both still starting behind the bars is preferred rather than starting them facing them forward, which would put the hoses right into the back of my headlight mask and odo, also competing for real estate with the brake and clutch hose routing.
Newduck, on page 2 post #32 of this thread you suggested:
wps 12-7130, wps 22-0061cl or mcmaster 52375k12
I ordered the clear vinyl McMaster hose with nylon reinforcement so that I can see the coolant. Have you tried the clear hose already or just the fuel injection hose? I'm thinking I'll also put a 1/4 shut off in case there's a leak at the beginning (and to throttle the heat if needed down the road). However, up in Ontario we're still fighting the Indians it seems...can't find either the Motion Pro or the Raider shut off valves at Crappy Tire or Princess Auto. Do any Canucks out there know where I can get these light weight 1/4 turn valves or a similar one that allows unrestricted flow?
I'm generally a fan of Rocky Mtn ATV/MC and Tusk products, but I tried this radiator cap on my 500 EXC and it didn't work at all. Out of the box, it was impossible to get it to twist all the way on. So I put just enough of a bend on the two tabs so I could get the cap installed. But then it leaked badly when the coolant temp was only up to 120 or so. I went back to the stock cap along with a Trail Tech temp gauge and haven't had any trouble since. But this was the only time that I've ever had any issues with a Tusk product, and I know that there are plenty of guys who use this cap and like it.
By the sound of it it seems that the problem was with the fit of the caps you guys tried. This one fits nicely but it is tight on my KTM 300 XCW. We will take the stock caps as redundancy on the first ride to make sure the Tusk unit does not leak and let us down.
Has anyone tried this temperature gauge:
http://www.gnarlyparts.ca/Tusk-High-Pressure-Radiator-Cap-with-Temperature-Gauge_p_2571.html
I like analogue gauges but I wonder if it's the best place to check your temperature - right on the top of the radiator?
A quick caution to those trying to port their own handlebars for coolant heating DIY. First: Centre drill, then pre-drill, then tap then break tap and spend the next hour extracting broken tap to save handlebars.
The milling machine set up was only to square up the drilled hole and start the tap so that everything was parallel. After turning the chuck by hand just to start both taps so that it was square, I then took the bars out of the vise and used a t handle to tap deeper which is when the tap broke. I find the 7075 is really tough even with lots of tapping fluid. Luckily, the tap was not too deep when it broke so I was able to salvage the hole and tap deeper but one should beware of tapping for pipe fittings in the bars. Turned out fine in the end.