Engine get's so hot!!

[carlperkins00...]

went out on my hornet today for a quick ride, realised that the needle on my heat guage was right at the top. never seen it that high before.
when i got onto the faster roads it went down because it was getting cold air in it.

any suggestions on what could be making it get so hot??

its got plenty of coolant in the radiator,
plenty of engine oil, (could old, mucky oil be causing this?)

and lastly, could a service sort it out for me? ive been meaning to get it serviced but havent got any money

any help is much appreciated.

[DaveH]

Is the fan working?

How are the fins on the radiator looking?
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https://www.timhastingsracing.co.uk/

ZX7R & ER6F

[Timmeh]

^ that,

and check that your water pump is running ok.
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GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
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[iooi]

^^ That,

And check stat ain't stuck shut.
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Just because my bike was A DIVVY, does not mean i am......

[ms51ves3]

Did it actually go into the red?

If not I'd just put it down to riding slowly and the outside temperature being very hot.

Unlikely to be the thermostat as he said it went down once riding on faster roads.

[Pete.]

Have you cleaned the bike with a jetwash? Many people flatten the radiator fins by jetwashing then the airflow through the rad is severely reduced.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[carlperkins00...]

nah not into the red, inbetween the red line and the last black line. (if that makes sense)

nope no pressure washing.

yeah it was very hot outside

yeah the fan comes on when it gets too hot.

can riding slowly increase heat? because i was riding through the city at the time, stopping and starting at the lights.
then i got onto the a140 doing 65mph and it went down to the middle line.

not sure how to check the stat and water pump to be honest...

[ms51ves3]

[MarJay]

[carlperkins00...]

ahh right... cheers ms51ves3, and everyone else. yeah i can hear the fan kick in when im sitting at the lights.

i shall use that excuse if i get caught speeding

...sorry officer i had to ride fast to cool the bike down

[carlperkins00...]

yeah i can do oil change, plugs, air and oil filters. But am in abit of a tight spot at the moment, im giving all my money to parents to pay bills etc.

hopefully ill be getting it serviced within the month, id rather have a professional do it incase they notice something that i wouldnt .

cheers for the advice.

[DaveH]

Are the fins on the radiator clogged? If so try carefully/gently cleaning them out using an airline, or soaking and rinsing with low pressure hose/water spray - from the back
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https://www.timhastingsracing.co.uk/

ZX7R & ER6F

[chris-red]

[StevRS]

If it's a carbed bike and one the balance is off between the carbs it can result in hot running too.
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MV Agusta Brutale 800 RR, Unfinished 1978 XS250

[carlperkins00...]

[Noxious89123]

If you derestricted it wrong, it could maybe be running a little lean.

I've just made a post in your other thread HERE, take a look...
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[bladerunner]

Just the weather alone over tha last couple of days has been enough for any motor of that state of tune to get hot in traffic. thats what the fan is there for! I know the fan on a 2006 hornet dont kick in untill 102' C is met and it turns off at 95'C carb inlet restrictors should not cause it to run lean...the std honda kit has washers in the inlet rubbers about 1/5th the size of the inlets ( I jest you not) but that and carb top restricors wont bother it in that respect. Also the honda kit had a different CDI unit. most probs to allow max torque at lower revs!
HTH

P.S. at 30mph and above you should be fine...if not post up again
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[carlperkins00...]

yeah i had 4 inlet blades in the rubbers between the carbs and inlet manifold.
didnt have the carb-top restrictors (the cylinders that restrict the slide movement)

M0l0t0v said that his friends hornet had a CDI restriction but he said if they restricted the CDI unit they would have given me the original. how can i find out if the CDI is restricted?

im starting to think it may just be the hot weather.

[Phoenix]

First stop is just to change the coolant, if it's been in there since day one it won't be working as well as it should, make sure you use the right mix.

My Blade was running hot in this temp, it's a digital guage so not sure what the red starts at but would assume red is considered about 115-120 degrees, most fans kick in between 100-105. At 80 on the motorway mine was running at 80 degrees yesterday, that's hot, after being stopped for 5mins it'd get upto 100 before the fan kicks in and keeps it around there. Even in croatia a few days ago the bike was only running at 76-77 while riding so it is pretty damn hot here at the moment.