Thermo-Bob 3 - Page 3 - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

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post #21 of 38 Old 10-30-2015, 10:50 AM Thread Starter
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I had the original T-Bob totally bassackwards.

Fixed it.

The original T-Bob won't fit at the lower location because it has to go in backwards. That puts the fat, flat end on the down side where it won't fit between the hose at the front of the engine and the headtube.

Tom

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“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.

Last edited by Tom Schmitz; 10-30-2015 at 12:12 PM.
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post #22 of 38 Old 10-30-2015, 11:55 AM Thread Starter
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While I'm doing this because it's fun, interesting, and keeps me out of the bars, the real intent of this is for someone who has an IMS 10 and no T-Bob.

This is an option for such a person, as the T-Bob 2 won't fit. Installing the T-Bob 3 in the lower hose fits better, overall, than the original does in the upper hose.

Using the original T-Bob backwards in the lower hose is not a part of the equation.

Tom

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“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.

Last edited by Tom Schmitz; 10-30-2015 at 12:13 PM.
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post #23 of 38 Old 11-05-2015, 12:18 AM Thread Starter
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The new hoses arrived, there was a round tuit on the counter, and the planets were aligned.

First thing, clear the front of the engine:



There were a lot of fits and starts, trying to find the perfect position and the perfect hose cuts, but I finally wound up with a good mock-up and pulled it out and built this, working on getting all the hose clamps correctly positioned for easy access and non-interference:


Installed:


Functionally it works identically to the original Thermo Bob.

It fits really nicely and doesn't touch anything. Should be good to go.

Tom

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“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.

Last edited by Tom Schmitz; 11-05-2015 at 12:23 AM.
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post #24 of 38 Old 02-11-2016, 05:30 PM Thread Starter
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It took a while, but I finally got a 1000 miles on the 195° thermostat.

I have ridden in 25°-30° with snow, mid 30°s clear and dry, 40°-60° with rain, and 55°-70° clear and dry.

The temperature at the T-Bob is always ~188° and the head temperature is rock steady at what looks like between 215° and 220°. Never varies.

Tom

Tom [email protected]

“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
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post #25 of 38 Old 02-11-2016, 05:57 PM
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Good to hear that Tom.
And your engine oil temperature at mile 20 is usually what??

Inquiring minds wish to know.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #26 of 38 Old 02-11-2016, 06:50 PM Thread Starter
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It depends.

The oil takes forever to heat up.

In 70° ambient with the Poor Man's "Block Off The Engine" the temp will be up towards 195°-205° after 20 miles and it will finish off at 215° after about 30.

In 50° ambient in might only be up to 180° after 20 miles.

Without the BOTE mod it takes a lot longer, of course.

I tried to judge how long it took to get up to a stable temperature on the last trip. It seems that a half hour of 65-70 mph will do it, and the final temperature depends on the ambient conditions.

Running up the Grapevine at 30-40mph (max for conditions) I watched the oil temperature drop from about 185° (about 50° ambient in the rain at the bottom of the hill, 65mph) to 150° (25°-30° and snowing as I went up the grade). That drop occurred in about 5 miles.

These are rough numbers from recollection, as I didn't specifically look into this. I remember being surprised that it took as long as it did.

I need to find a way to elevate and stabilize oil temp, keeping it over 200°.

Tom

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“She went out slowly. The way she did it hadn’t been learned at business college.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
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post #27 of 38 Old 02-11-2016, 08:41 PM
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This is Half of the reason that I do not ride my KLR the 1.1 miles to and from work every day! My pick-up has a proper Positive Crankcase Ventilation system on it. No Milky OIL. Normk is working on this issue!

The $400 exhaust system is the other Half of the reason! vs $70-$100.00 for the pick-up.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #28 of 38 Old 02-13-2016, 12:32 AM
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Thermo-Bob 3

I am enjoying reading how you guys really get stuck into your bikes!

Quote:
Originally Posted by pdwestman View Post
This is Half of the reason that I do not ride my KLR the 1.1 miles to and from work every day! My pick-up has a proper Positive Crankcase Ventilation system on it. No Milky OIL. Normk is working on this issue!



The $400 exhaust system is the other Half of the reason! vs $70-$100.00 for the pick-up.

(British humour warning - following comments made 'tongue in cheek')

You not tempted to walk the 1.1 miles? Lots of benefits:
- engine at full working temp within 2 blocks
- exhaust system good for life of 'vehicle'
- exhaust gases able to flow freely (and colleagues appreciate these being burned off prior to arrival)
-daily operation positively extends 'vehicle' lifespan
- $30 annual budget for 'tyres' needed
- opportunity for walk through coffee on route
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Last edited by Temporaryescapee; 02-13-2016 at 12:35 AM.
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post #29 of 38 Old 09-26-2019, 04:14 PM
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Quote:
Originally Posted by Tom Schmitz View Post

Tom

Dang, that's a lot of hose clamps!
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post #30 of 38 Old 09-26-2019, 05:33 PM
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Quote:
Originally Posted by Schoen View Post
Dang, that's a lot of hose clamps!
I agree.

I've spent years, ~19, designing and working on Multiplex hydraulic control systems for use on subsea BOP stacks and for the sake of reliability, you always strive to minimize the quantity of potential leak paths on a hydraulic control system. I'm in the minority when I say this, but the advantages of the Thermobob do not offset the cost of the system and the inherent increase in failure points.

But if you enjoy adding stuff to your KLR, you could do far worse than installing a Thermobob. So, if it's caught your eye, go for it. But the Thermobob should be way down on the list of things you need to do to get that bike up to scratch.

Jason
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