ok to paint head? - 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 5 Old 04-03-2016, 09:52 PM Thread Starter
Join Date: Apr 2016
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Question ok to paint head?

Hi! Working on cleaning up a 90 KLR650. I have some black "500F engine enamel" that I use on car engine blocks. Is it ok to paint the cylinder head with this? I know its a liquid cooled engine, but the head does have some cooling fins on it.

Its pretty rough looking right now. Bare metal in alot of places. any advice? thanks
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post #2 of 5 Old 04-03-2016, 10:53 PM
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Shouldn't be a problem, they come painted from the factory. I'm not even sure if it's a high temp paint from factory, looks like a regular enamel to me.
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post #3 of 5 Old 04-04-2016, 01:19 AM
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If the KLR has any issues in most climates, IMO, it is too much cooling from air flow onto the engine. I agree with 650Stew (always safe ground) that it's fine to paint.

If you are up to doing two drilled and threaded 1/8" NPT holes, why not install a thermostat bypass to help even up engine internal temperature?

The stock 160 F thermostat will work fine with the bypass although using a 180 F stat from a Sega scooter or a 195 F is even better.
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post #4 of 5 Old 04-04-2016, 07:57 AM
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I paint all my engines so after they are clean and ready to install on my own bike that is, unless asked by customer to do the same to their engines with engine paint from our Cnadian Tire storre up here.....it's high heat engine paint, not exhaust high heat just engine paint and it comes in colours close to the stock greenie gray colour.....to each their own....
BUT I'm also in the leave the coolant system stock unless you are living in a cold climate where you must either plug off the rad in cold seasons or do the dreaded thermo-bob ........if you live somewhere where the temps get hot in the summer you definately do not want to bypass any part of the cooling capabilities of the rad...imho.....I even run two alluminium rads and my engine stays at the stock recommended temperature not so close to the hot levels where some seem to like it to be. Too much heat destroys engines....so just think about that before modifying the cooling system....IMHO.

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post #5 of 5 Old 04-04-2016, 01:18 PM
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Too much heat destroys engines as does not warm enough, FWIW.

The effect of a 3/8" bypass hose is very small as the only pressure differential is the restriction of the radiator, when the thermostat is open. That's the only time it matters.

I prefer a 5/16" hose over the 3/8" used for the T-bob, for that reason.

Thanks for the heads-up on the paint. I'll keep an eye open at CT.
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