• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

Another one Bites the Dust

Tinken said:
Still never answered my question. I asked because you cannot typically use Evans coolant in a motorcycle, it is too viscous to flow properly. This was not a fault of the product, but of your own. If you had put the wrong oil in your engine and it failed, would you blame the oil?

We developed our XF to be specifically used in small motorcycle systems and works perfectly. It is manufactured by Evans for us, but is not "Evans". We have a new coolant coming which I designed called XF2 which flows even faster than our original product. Both our coolants can be combined with water in an emergency, but there will be no need to add out on the road otherwise.
Click to expand...

When will the newer XF2 be available? I went to the ZipTy website and it said the XF+ coolant was unavailable.
 
I have been running Zip Ty XF coolant. I have about 2500 miles on the coolant. So far it has been great. It seems to cool my bike better then the stock coolant. I am basing this statement on the fan does not run as much as before the ZF was installed.
 
Baddrapp said:
I have been running Zip Ty XF coolant. I have about 2500 miles on the coolant. So far it has been great. It seems to cool my bike better then the stock coolant. I am basing this statement on the fan does not run as much as before the ZF was installed.
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Thanks, I must have had a bubble stuck.

Final answer, had to be a bubble stuck.

I have to admit, it is totally strange opening a radiator with the engine hot, and no pressure. I may still try this stuff later on down the road, I need to process this whole ordeal.


Thanks all for the support and ideas. :cheers:
 
I am also running the Dobeck EJK. I have it adjusted to where it is adding a lot of fuel in the lower rpm's. I am sure it has lowered my engine temps. Our bikes run extremely lean at anything except full throttle and high rpm's. I noticed anything above 7000 is rich which is good.
 
I didn't have time to read the full article, can you remove it permanently?

Edit: It does look removable and that's what I would recommend. We remove them from all of our motorcycles, including our larger displacement KTM adventure bikes.
 
Basically the original poster did a fulllllll drain, likely there was an air pocket at either the thermostat causing it not to open (needs hot fluid to open it) or an air pocket causing a lack of coolant flow.

What say ye experts?
 
It is on the right side of the radiator. It is the round insert on the bottom of the tank. It would be great if we could remove the thermostat.
 
Tinken said:
I didn't have time to read the full article, can you remove it permanently?

Edit: It does look removable and that's what I would recommend. We remove them from all of our motorcycles, including our larger displacement KTM adventure bikes.
Click to expand...


Are you removing the Thermostats because you are running the ZipTy waterless coolant ? What are the advantages/disadvantages running without a t-stat ?
 
Tinken said:
How did you remove the oem thermostat before putting yours inline?
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I'm going to get a bunch of photos here directly to post for discussion.

The more I look at this crazy setup, the more I don't like it, yet can appreciate what they were trying to accomplish.

My guess is that the engineers wished to create a constant flow of coolant through the engine. The thermostat appears to allow the crossflow of the radiator. When the bike is cold, it diverts the flow right back into the hose. When warm/hot diverts the coolant accross the bottom half then back across the top half to the inlet hose to the pump. The bulk head seems to have a partition to separate the top and bottom halves, but does not.

I will have to show you pictures to explain this better.

I think I have found the culprit, but not sure. A little rubber piece that may have a function in isolating the path across the radiator.
 
This first picture is to show that both inlet at outlet dump into same chamber.
DSC08336.JPG

This next one shows how the thermostat assembly lines up
terra-thermostat-proximity.jpg

The next photo is the parts separated. The brass operates the thermostat. I put it in a pan of water and boiled it to see it in action. The pin pushes in and out.
DSC08348.JPG

This is the sealing seat of the thermostat to the upper radiator bulk head. The brass piece is in the seating plastic. That piece has a stout spring, hope it is temp sensitive, but did not check.

DSC08349.JPG

Now go back to picture one and see how it all aligns with the radiator tank.
 
Hansi said:
Are you removing the Thermostats because you are running the ZipTy waterless coolant ?
Click to expand...

There are tradeoffs. Waterless coolants do have a higher viscosity than pure water and are more difficult to flow. Thermal flow characteristics are a mathematical calculation no mater what your coolant type, therefore higher flow rates of any coolant will increase heat transfer from your engine to your heat exchanger. Flow rates from a motorcycle water pump are not the highest either, especially when sitting at low rpm/idle at a stop light. You can sit longer at the stop light with a waterless coolant than with pure water which tends to form a hotspot bubble, but the waterless coolant is tougher to flow. For example, at 50°F the viscosity of pure water is 1.3cP versus 2.0cP of Ethylene Glycol. This viscosity decreases at higher temperatures.

Hansi said:
What are the advantages/disadvantages running without a t-stat ?
Click to expand...
Depending on your climate, it may take a few more minutes to bring your Terra up to operating temperature without the thermostat. From what I have seen across the threads though is that these 650s generally run pretty hot, so I don't believe there would ever be an issue of running them at less than ideal temperatures.
 
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