Temp guage going into the Red

[Rumble Ripper]

Hi aussiekeeper:

You seem sure about the thermostat. How are you sure? Just don't want to order something I may not need?

Rumble

[NickSully]

Hi aussiekeeper:

You seem sure about the thermostat. How are you sure? Just don't want to order something I may not need?

Rumble

You can test the thermostat by taking it out and dropping it in boiling water. The Thermostat should open up. If it doesn't the thermostat is bad.

You mentioned that you had to take the water pump off. Did you loose any fluid when you did that? If so you may just have air in the system.

Good Luck

[enthalp1]

the gauge would occasionally rise quickly ( within 1-2 seconds) into the red area, then without warning fall back down to normal levels again.
This seemed strange

Here are your basic options...
1. A bad sensor (thinks its too hot when it actually isnt)
2. A bad water pump (not circulating the fluid)
3. A bad guage ( thinks it's getting a hot signal from the sensor)
4. Air in the system
5. Fans not working
6. Thermoswitch not turning the fans on ( sorry don't know if bikes use these)



First thing to do is to verify the complaint - is it actually overheating or does it just THINK it's overheating. Easiest thing to do is swap parts....but if you don't work at a shop then you a re gonna have to diagnose each part starting with the most likely first, my guess is #4, but you drove it and that world normally bleed any air out. Jump the fans and see if they run - that will take them out of the picture. Now you'll need a wiring diag. and a multimeter. Check to see that the temp sensor is getting 12volts. Check the ohm reading of the sensor cold and then hot. Compare these readings against the workshop manual or a buddies bike. Try and figure out if it's an eletcrical problem with the cluster/bad ground thing.....the needle should rise or fall very quickly for this to be the case. An ECT sensor is kinda slow to react, more like the fuel guage on a car (perhaps a little faster) . If you suspect the thermostat you can take it out and do the boiling water test (sometimes there's a temp stamped onto the surface) If you suspect the water pump, take it out and look at it closely - grab the pump at both sides and see if they spin independantly or as a unit. I Don't think this is your problem on such a new bike. Actually , I'll put money on it that this problem is a result of something you did recently....??? Hope this helps.

[BusaBlue]

If I have the battery on and the kick stand down and put it in gear (doesn't happen in neutral) the temp gauge will max out. Also, if I flip the engine kill switch to kill, it will max out the gauge. So, there could be a relay or computer that is making this happen.

[Htown Busa]

I had this problem once and I took it to the dealer. They could not find anything wrong. The has not reoccured. "knock on wood"

[faster]

Rumble.....Do you have an XTRE on the bike? When they start going bad, the green striped wire that is cut when installing it (which carries the serial port data to the dash) causes the temp. gauge reading to go up and down.

If the wire is totally cut, the temp. gauge will go to maximum and stay there.

The gear indicator also goes through this wire. Is that still working normally?

I have a feeling that if the ECU starts going a bit crazy then this can also happen as stated above. Those damn processors.

[BusaBlue]

Check out the electrical section in the k8 manual pinned at the top of gen II topics.

Page 9C-3 Resetting stepper motors.

Page 9C-4 Checking temperture indicating system.

Also, check for any wire that may be abraded and grounding out, this will make the gauge go to full hot and can also be intermittent.

[Rumble Ripper]

Hi again. Well took the fairings off the right and left side tonight and tested the fans (they are working when connected to 12V source). Tested the fan relay and it is within specs also. Rechecked the Fuses all are good. Removed the sprocket cover and removed the water pump and rechecked how I had installed it, and it seemed fine. Reinstalled and was going to take my bike out in the morning to see if the problem still occuring.

Faster, thanks for your input, and yes I do have an XTRE installed, and ever since I installed in my Gear Position indicator will fluctuate. Some times it shows the gear I am in and sometimes it just says "CHEC". I just assumed that the XTRE was a bit finicky and left it at that. Did not notice the Temp gauge ever jumping, that seemed to start after my last round of mods, but then again not right away. I do have a Jumper for my XTRE that effectively removes it from functioning, if I install this would it be able to rule out the XTRE as the source? ie if I install the jumper (came with the XTre) and the problem goes away, and then remove the Jumper, problem back the it is the XTRE, or is it possible that the Temp problem will still occur even with the Jumper and the XTRE being the problem?

This seems like a very likely candidate, due to the intermitant nature of the Gear position indicator also. Thank you very much for this info. I will start looking at the XTRE system and report back.

Busablue thanks for the info on where to look for Temp wiring I will also look that over if the XTre check leads nowhere.

Thanks again for all the great help.

Rumble

[valkyriemc]

Hi again. Well took the fairings off the right and left side tonight and tested the fans (they are working when connected to 12V source). Tested the fan relay and it is within specs also. Rechecked the Fuses all are good. Removed the sprocket cover and removed the water pump and rechecked how I had installed it, and it seemed fine. Reinstalled and was going to take my bike out in the morning to see if the problem still occuring.

Faster, thanks for your input, and yes I do have an XTRE installed, and ever since I installed in my Gear Position indicator will fluctuate. Some times it shows the gear I am in and sometimes it just says "CHEC". I just assumed that the XTRE was a bit finicky and left it at that. Did not notice the Temp gauge ever jumping, that seemed to start after my last round of mods, but then again not right away. I do have a Jumper for my XTRE that effectively removes it from functioning, if I install this would it be able to rule out the XTRE as the source? ie if I install the jumper (came with the XTre) and the problem goes away, and then remove the Jumper, problem back the it is the XTRE, or is it possible that the Temp problem will still occur even with the Jumper and the XTRE being the problem?

This seems like a very likely candidate, due to the intermitant nature of the Gear position indicator also. Thank you very much for this info. I will start looking at the XTRE system and report back.

Busablue thanks for the info on where to look for Temp wiring I will also look that over if the XTre check leads nowhere.

Thanks again for all the great help.

Rumble

I had some of the same problems; temp gauge erratic, chec came on, long story short, XTRE -removed, jump installed. Everything good. May send it back.

[gill_grissom]

I think the problem is with the sending unit for the temp needle.. When a thermalcouple goes bad it always indicates max temp. I think that the thermalcouple is going bad or you have an open in the circuit causing the gauge to think the thermalcouple is bad. just my $0.02........

[Rumble Ripper]

Hi Everyone:

Well removed XTRE (actually just installed the jumper that came with it) and everything is back to normal. I am going to contact Heal Tech to see if I can get a refund for this unit that I purchased only 2 months ago.
Thanks everyone for the input in tracking down this issue. I was about to pull off the ECT sensor and test it and then test the thermostat. Glad I did not have to drain everything and do that.
Now back to riding!

Rumble

[valkyriemc]

Hi Everyone:

Well removed XTRE (actually just installed the jumper that came with it) and everything is back to normal. I am going to contact Heal Tech to see if I can get a refund for this unit that I purchased only 2 months ago.
Thanks everyone for the input in tracking down this issue. I was about to pull off the ECT sensor and test it and then test the thermostat. Glad I did not have to drain everything and do that.
Now back to riding!

Rumble

Pls post their response, they can have mine too....

[Rumble Ripper]

Pls post their response, they can have mine too....

Valkyriemc here is the response I received and the email I sent them

Hello Rumble Ripper,

Thank you for your email - I'm sorry to hear about the problem.

Sounds like something is wrong with your unit, or it was not secured
properly and the connector pins got loose.

Apart from this problem, are you not satisfied with the performance?
Our tests show significant improvement in all gears (other than 5th) at all
RPMs.
Here are some dyno charts.

If it is ok for you, we will replace your unit and it should work fine then.

Kind Regards,
/Norbert
healtech-electronics.com


-----Original Message-----
From: Rumble Ripper [mailto:rumbleripper@me.com]
Sent: Friday, August 21, 2009 22:52
To: support@healtech-electronics.com
Subject: Purchased XTRE for 08 Busa

Hello:

I purchased an XTRE for my 08 hayabusa and started having problems
with my Gear shift indicator and my Temp Gauge. Took me one week to
realize the problem was the XTRE. After installing the Jumper Temp
Gauge and Gear Position indicator back to normal.
I purchased the unit about two months ago from Pashinit.com and am
not very satisfied with it. I would like to get a refund on my
purchase if at all possible. Could you advise how I would go about that?


So it seems a refund is out of the question. I will ask that they send a new unit out to me though.

Rumble

[faster]

Hi Everyone:

Well removed XTRE (actually just installed the jumper that came with it) and everything is back to normal. I am going to contact Heal Tech to see if I can get a refund for this unit that I purchased only 2 months ago.
Thanks everyone for the input in tracking down this issue. I was about to pull off the ECT sensor and test it and then test the thermostat. Glad I did not have to drain everything and do that.
Now back to riding!

Rumble

Sorry that I couldn't get back to you in a timely manner but I see it was your XTRE. A serial data stream goes through the green wire and this controls the temp. gauge and the gear indicator among other things. As you found out the shorting plug is a great way to find a bad XTRE.

If the connection is bad at the point where the green wire was spliced then the shorting pin wont help much. Most likely one would have to use a multi-meter to find the bad connection.

So glad to hear you found the problem.

You are definitely not the first person to have problems with a failing XTRE and it sure creates some crazy symptoms. I'm still not too fond of the idea of having to cut a wire that has a data stream on it because of all the crazy symptoms it can create. It can have you tearing the whole bike apart looking for a trouble that really doesn't exist.....it just make it seem like there's something wrong when in reality; there isn't.

[Rumble Ripper]

Hey Faster:

Thanks for all your help. Saved me a lot of trouble, work, and riding time!!!

Rumble.

[valkyriemc]

I was told I had a probable "bad connection". Well I've been a comm tech for 30+ years and I solder almost daily to include surface mount technology. I hand soldered and heat shrunk/shrank the connections. If anybody implies that my interconnect(s) were "bad" they can go pound sand...