Thermostat too much for me. - SV1000 Portal
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post #1 of 10 (permalink) Old 3rd September 2019, 09:11 PM Thread Starter
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Thermostat too much for me.

What was I thinking? Oh its easy, they said. Just loosen up on this to get to it, they said!

Ive been turning wrenches since I was five years old mostly on air cooled engines, VWs and Porches and motorcycles but this thermostat on my SV1000s broke me! Its suspended from the cylinder heads by radiator tubing so when I applied pressure to my 10mm wrench the whole thing just twists and I cant get a good bite on the two bolts I want to remove so I may replace the thermostat! I considered removing all the tubing but then the question becomes, How do I replace the tubing, assuming I can remove the thermostat housing?

So, Ive got the parts on order. My radiator should arrive today after sending it to Mylers for refurbishment, so Im gonna install the radiator, add new coolant and schedule the shop to replace the thermostat. Problem solved!

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post #2 of 10 (permalink) Old 4th September 2019, 01:02 AM
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Do you know that your thermostat is in need of replacing ?
Yes, they are a bit of a dog, but, perserverance pays off....

My turdo-stat is still kicking over 175k miles later..... yippee....

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
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post #3 of 10 (permalink) Old 4th September 2019, 01:56 AM Thread Starter
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Actually, Im not certain that its not working as it should. My old school SOP compels me. Bike runs great but if Im in stop & go traffic or too many signal lights in a row, traveling at less than 40 mph, it gets hot! 220+ is a bit much but as soon as I get moving she cool right down.

Is there a troubleshooting step youve got in mind?

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post #4 of 10 (permalink) Old 4th September 2019, 05:38 AM
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220 is 104 celcius in my language, which is where the fan will kick in......
Its not unusual in traffic for these things to get that hot at all.....the problem is if it
wont come back down from that temperature, then there is an issue....

You refurb radiator MAY work better than the original, especially if the core has been replaced somehow...never seen that done on an OEM radiator before though....

Just make sure you get all the air out of the system by gving the hoses a good pump as the coolant goes in....and fill it on the sidestand, so the cap is the highest point....

I run an ebay unit, its welded together, petty obvious lookiing if you do a search....i sanded it a touch and painted it in heatproof black paint, and the bike runs heaps cooler than previous.....a it too cool in winter maybe.....
07blacksv1ks likes this.

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
One owner..... 290,000kms and counting...
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post #5 of 10 (permalink) Old 4th September 2019, 11:48 AM
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I replaced the thermostat on my SV. It was definitely faulty as the bike was underheating at highway speeds.

Anyway, the key to removing/replacing the thermostat is to first remove the regulator-rectifier.

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post #6 of 10 (permalink) Old 4th September 2019, 03:44 PM Thread Starter
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I did that too. Thanks!

RealShelby / Werks clutch basket mod. It works great!
Flush mount LED indicators.
Dave Moss suspension tuning.
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post #7 of 10 (permalink) Old 5th September 2019, 11:40 PM
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Sitting in traffic, my bike sees temps upwards of 225F. When it hits 221F the fan kicks in and cools it down. But the hot weather in Sac just doesn't allow the ambient air around the radiator to cool effectively. Once it gets moving it goes back down to normal until I hit another set of stop lights. I haven't replaced the thermostat on my '03.

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post #8 of 10 (permalink) Old 6th September 2019, 01:06 AM
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I am sorry that it is hot around the SAC.....maybe thinner underpants ?

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
One owner..... 290,000kms and counting...
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post #9 of 10 (permalink) Old 6th September 2019, 07:46 AM
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Quote:
Originally Posted by 07blacksv1ks View Post
I did that too. Thanks!
I'm 100% certain that after removing the reg/rec you'll have the space you need to replace the thermostat. IIRC I used a wobble attachment on a socket to loosen the bolts in the cover.

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post #10 of 10 (permalink) Old Today, 01:46 PM
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Quote:
Originally Posted by amidroc View Post
Sitting in traffic, my bike sees temps upwards of 225F. When it hits 221F the fan kicks in and cools it down. But the hot weather in Sac just doesn't allow the ambient air around the radiator to cool effectively. Once it gets moving it goes back down to normal until I hit another set of stop lights. I haven't replaced the thermostat on my '03.
I imagine replacing the stock fan switch with a lower temp unit would help.

the thermostat is wide open well before that, so I wouldn't bother with it.
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