Viper Motor Transplant Cooling Question

V

viper17

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Joined
Feb 6, 2007
Messages
96
Age
35
Location
Three Lakes
Its been a long time since I've been on here but I've never been able to get rid of my viper motor and I finally have a new home for it. I'm just wrapping up the build of dropping my motor into my IQr chassis. The build has gone great and I'm nearing the end but need to figure out the cooling system. I'm adding cooling capacity but I don't have a viper chassis in front of me to refresh my memory and where hoses go. The yamaha schematic doesn't help either.

I assume the pump on the front of the motor is pulling coolant in and coolant exits the motor via the cylinder head. The hose coming out of the cylinder head goes into the thermostat housing, the bottom of the thermostat housing goes to the heat exchangers, and the other inlet on the thermostat is coming from the coolant tank/outlet of the heat exchangers. Am I missing anything or is this the entire system?

I'll try to get some pictures up when I can. Its a build on a budget so its not very shiny but it is built to take a beating. Can't wait to have that great triple power in the IQr chassis. Thank for the help
 

As well all know the viper motor is "hung" in the viper chassis so that made it interesting to figure out how to mount it. I went with a .500" thick aluminum plate and used 8 of the 16 case bolts along with spacers to create a motor plate. I then bolted this to the existing motor straps in the IQr chassis. Its a little redneck but I'm pretty confident it will hold up, along with two torque arms on the PTO side. The chassis is tight which is why the single pipe was a good fit and took only minor modifications to work. The can is one I had laying around and should be fairly easy on the ears exiting out the side :lol: Had to add a joint to the steering to get around the powervalves and y-pipe. Other than that its going pretty smooth. Have to button up alot of little things but hoping to try it out this winter.

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How will you adjust for ctc and offset? Also will you vent the carbs to airbox or atmosphere, as I believe it changes the jetting.
 
captnviper said:
How will you adjust for ctc and offset? Also will you vent the carbs to airbox or atmosphere, as I believe it changes the jetting.
Click to expand...

I kept the CTC the same as the stock motor and will be running a polaris primary as the taper is the same on the crankshaft. No airbox for now, I will get around to building one this summer hopefully. I'd rather build an airbox so I'm not pulling warm air from under the hood. Maybe I'll do some sort of forced induction like the viper originally came with, but make it really do something. I will most likely have to re-jet with the "custom" exhaust anyway.
 
Trying to get everything together so I can do a test run soon. I'm just getting the bare necessities hooked up, no handwarmers, tail lights, head light, etc. Do I need to have the gauge pod hooked up in order to get spark? I wouldn't think so but I've heard stranger things. I am using the stock wiring harness but I'd like to take it apart this summer and strip out everything I won't be using to cut down on the clutter.
 
Another electrical question. The wiring diagram refers to a motor ground and a frame ground. The motor ground is on the bracket that holds the coils right by the carbs. However I had to relocate this to due to flipping the carb boots. The coils are not mounted to the steering hoop. Is it necessary that the motor ground and frame ground are separated? Currently the motor is grounded to the frame, I believe through the exhaust springs, not sure if this is ok either.

I would change the title of this thread to electrical questions but I can't figure out how to edit the thread title.

Thanks in advance for any feedback
 
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