Thermostats are usually trouble free for the life of the ride, not so much for the plastic water outlet which can warp and seep past the seal along with hose clamp seepage there. Fan removal required and should use heat and weasel juice outlet bolts so you don't snap them. They can turn into a bigger job than anticipated.
The problem is:
I let it idle in the shed until the fans run, then after riding for a while the temp drops back to around 1/4.
The history of the bike is that it was owned by a collector (Japan) and then purchased by previous owner (Australia) .
This guy cleaned himself up on a dirt bike.
It has 20000km (12000 miles) on the clock.
Carbies were full of gunk. Missing, running rich,stinky.
Everything else seems brand new!
What temp should I be looking for on the IR temp gun?
I would guess the IR gun is going to show somewhere around 150-180 degrees
Been 10 years since I used an IR gun on the 1500s that I had before my 1800 that is in the shop now.
on my 1800 and pulling a trailer, the valve covers were running around 125*F when I would stop for gas.
so were the wheel hubs on the bike and trailer, and also on a Harley that just happened to pull in at the same time I did.... I took a wheel hub temp to see what the comparison would be... his bike was less than about 5* difference than my bike.
kind of wish I had thought to take a cylinder head temp on his V-Twin now though
I think 1/4 scale is just about right on a 1500, on a cool day when moving down the road mine stays right around 1/4 scale, It'll get to 1/4 scale fairly quickly and then just stay there. On a hot day in stop/go traffic it can get to 3/4 scale.
All back together.
I decided to leave the thermostat for later (maybe).
Carbies turned out not to be the nightmare that I expected.
Quite easy if you take your time.
Very clean inside. One float level was too low.
The problem appears to have been with the enrichment linkages not fully closing.
Careful re-bending of the linkages allowed the needles to fully seat.
Anyone else seen this problem?
I am certain I am the first to have been into these carbies.
Anyway, some temperature readings. (all taken on the back of the cylinder heads)
Ambient 15c (59f)
1st cycle of the fan 10 minutes 85c(185f)
2nd cycle 2 minutes 92c(197f)
3rd 95c(203f) just over half on the gauge.
After a 50km(30 miles) run (ambient 16c)
77c(170f) and 1/3 on the gauge all the way.
Very happy with the outcome.
There is a very slight surging at idle (idle mixtures?)
But that is for another time.
Also sets off my monoxide alarm in about 30 seconds.
I will update temps when summer gets back downunder.
Thanks for all your imput
The plastic thermostat housing cracked on my `98 S.E. once. Antifreeze all over the place, and engine over heated a little. Luckily I wasn`t far from home when it happened. Bugger of a job to repair. I put in a new thermostat. Bike had over 200,000 miles at the time. Once bike hit 200,000 it was one thing or another most of the time. Time for new bike.