Radiator block off - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 7 Old 10-25-2018, 09:48 AM Thread Starter
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Radiator block off

Up here in the North west corner of the state's the temperature is getting into the low 40s. This is my first year on my klr and my bike is running super cold with the temp needle just above the cold mark at any speed over 25. The idea I have is to decrease airflow through the radiator. Maybe a strip of duct tape to cover half or a cloth over the whole thing to slow down the air flow.
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post #2 of 7 Old 10-25-2018, 09:49 AM
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you could do that but the best fix is to add a thermobob. Information, Articles the bypass and higher temp thermostat will solve your cold issues


Dave
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post #3 of 7 Old 10-25-2018, 11:25 AM Thread Starter
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T bob is on the list.
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post #4 of 7 Old 10-25-2018, 11:41 AM
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T bob is on the list.
with the T Bob installed, you shouldn't need anything else.

Dave
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post #5 of 7 Old 10-26-2018, 06:08 AM
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with the T Bob installed, you shouldn't need anything else.

Dave
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post #6 of 7 Old 10-27-2018, 02:26 PM
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Quote:
Originally Posted by John93klr View Post
Up here in the North west corner of the state's the temperature is getting into the low 40s. This is my first year on my klr and my bike is running super cold with the temp needle just above the cold mark at any speed over 25. The idea I have is to decrease airflow through the radiator. Maybe a strip of duct tape to cover half or a cloth over the whole thing to slow down the air flow.
With the stock system in sub 40f conditions one could almost cover the entire radiator at highways speeds and the air around the engine block & crankcase would almost be enough radiant area.
The KLR engine is one Giant aluminum Heat Sink!

I will also endorse the use of a Thermo-Bob at your earliest opportunity. Get the temp needle into the middle of gauge scale.

pdwestman
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post #7 of 7 Old 10-28-2018, 02:01 PM
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Probably get away with half of it covered on your average Midwestern July day too. Even in the mid 80's, uncovered, mine runs well below halfway up the scale. Usually sits about 1/4" over the cold mark running down the road.

Never pick a fight with an old man.. If he's too old to fight, he'll just kill you..
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