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mr_arrow
Joined: 23 Apr 2007
Posts: 12
Location: Auckland
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 Posted: Mon Apr 23, 2007 12:29 pm Post subject: KT100 Head Temp |
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Hey, thought Id kick off the yamaha forum with a question for you guys.
What in your opinion is the ideal / max head temp for a new style kt100 head?
cheers  |
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Phil
Joined: 12 Apr 2007
Posts: 36
Location: Tauranga
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| Posted: Mon Apr 23, 2007 4:29 pm Post subject: kt head temp |
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| My KT used to run at around 420-430F all day long quite happily. I think that is getting towards the upper limit of ideal though?? |
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br11
Joined: 28 Apr 2007
Posts: 44
Location: tauranga
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| Posted: Mon Nov 05, 2007 5:31 pm Post subject: |
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hey guys
whats the average temp for a kt100. mine is running at 140? off the top of my head. need to find out wether this is about right, to low or cooking
cheers
br11
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Phil
Joined: 12 Apr 2007
Posts: 36
Location: Tauranga
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| Posted: Mon Nov 05, 2007 7:56 pm Post subject: |
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Most people measure the cyl. head temp in Fahrenheit for some reason.
140C is around 284F so that would be way to cold. Are you using an Alfano sensor?
Also old gen cyl heads cant handle the heat like the new gen heads. I've heard around 380F is max for an old gen head.
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Chris A
Joined: 14 Apr 2007
Posts: 13
Location: Mount Maunganui
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| Posted: Tue Nov 06, 2007 6:31 am Post subject: |
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Suggest you go to the Kartsport website and go to Reports - print off a copy of the article "Gauging your Gearing".
At 284 deg F you are either running way to rich or more than likely running too many teeth.
Old gen motor 390deg F, or new gen 420 deg F should be your target temp - and the sooner in the race the better (Then you have to keep it there , which is another story)
If you are at the track this Sat, I'll give you a hand getting it sorted.
Do you know what the carb pop-off and lever arm height is, and where do you start on the jets? What colour is the plug? |
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br11
Joined: 28 Apr 2007
Posts: 44
Location: tauranga
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| Posted: Wed Nov 07, 2007 2:46 pm Post subject: |
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i run a mychron so i guess the sensor would be the same. i usually run at 1 3 quarters on the low jet and just above a quarter on the high. we will be unable to come out to the track this weekend but thanks for the offer might try to catch up with you at the meeting.
the motor is an old generation, i think?????? but will find out from engine builder next time i see him.
thanks for the help guys most appreciated
br11
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Phil
Joined: 12 Apr 2007
Posts: 36
Location: Tauranga
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| Posted: Sun Nov 11, 2007 8:17 pm Post subject: |
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You are probably too rich on your high speed jet, try shutting it off to between 1/8 and 1/4 of a turn.
For the low speed jet, as Chris says, the carb settings will determine how far out it needs to be, but like everything else in karting- Experiment.
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br11
Joined: 28 Apr 2007
Posts: 44
Location: tauranga
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| Posted: Wed Nov 14, 2007 5:14 pm Post subject: |
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thanks phil
we have everything sorted out know.
cheers
br11
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