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Author [ES] [MY] [PL] [PT] [IT] [DE] [FR] [NL] [DK] [NO] [GR] [TR] Topic: Sprag clutch upgrade Tiger '07  (Read 827 times)

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Online Sidewinder

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Re: Sprag clutch upgrade Tiger '07
« Reply #10 on: 05 November, 2019, 08:33:01 PM »
Great!

However, bypassing the clutch switch is a bad idea as the ECU uses it for other things than just a safety interlock.  You're fuel gauge will likely stop working properly for starters.

Offline Freddy

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Re: Sprag clutch upgrade Tiger '07
« Reply #11 on: 05 November, 2019, 11:08:48 PM »
 :0461:   :031:
The best substitute for brains is ........what?

Offline Max

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Re: Sprag clutch upgrade Tiger '07
« Reply #12 on: 06 November, 2019, 02:33:32 PM »
*Originally Posted by Sidewinder [+]
Great!

However, bypassing the clutch switch is a bad idea as the ECU uses it for other things than just a safety interlock.  You're fuel gauge will likely stop working properly for starters.

 :084: That sounds weird, but if you say so I will reinstall it. (I didn't seem faulty when I checked the resistance open/closed anyway)

Another update.. the bike did the same again this morning :157:
Guess it's time for a new starter solenoid..

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Re: Sprag clutch upgrade Tiger '07
« Reply #13 on: 06 November, 2019, 04:37:02 PM »
Checked condition of solenoid's 30a fuse - contacts etc?  Also consider the starter relay (rearmost in set of three) may be a cause.

Offline Max

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Re: Sprag clutch upgrade Tiger '07
« Reply #14 on: 07 November, 2019, 09:34:13 AM »
*Originally Posted by Sidewinder [+]
Checked condition of solenoid's 30a fuse - contacts etc?  Also consider the starter relay (rearmost in set of three) may be a cause.

Yes I checked it in multiple ways, but it seems to function perfectly.
When starter disconnected I measure correct resistances and it engages (and stays engaged) on every press of the starterbutton.
With everything hooked up it will rotate the crank a couple of times but then the solenoid disengages and headlight turns back on.

I also read somewhere the ECU can stop the starting process when it reads too low voltage, so maybe that's the issue here.
I measured less than 9V over the battery while starting :084:
So before I give up on the solenoid, I will upgrade my cables with these; https://www.squaredeals-ltd.co.uk/triumph-tiger-1050--se-starter-battery-cables-upgrade-45382-p.asp

Keep you posted if that helps.

Offline Paul2bikes

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Re: Sprag clutch upgrade Tiger '07
« Reply #15 on: 07 November, 2019, 10:33:45 AM »
*Originally Posted by Max [+]
I also read somewhere the ECU can stop the starting process when it reads too low voltage, so maybe that's the issue here.
I measured less than 9V over the battery while starting :084:

Shouldn't a good battery show a minimum of 10v while cranking?

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Re: Sprag clutch upgrade Tiger '07
« Reply #16 on: 07 November, 2019, 11:13:59 AM »
Yes if the ECU sees the voltage drop too far it will disengage the starter relay.   Voltage shouldn't drop below 10-11v while cranking.

Have you checked the earth side?  Earth point on gearbox and neg battery terminal?

Also you have a lithium battery?  Have you tried putting the lights on for 30secs or a minute before trying to start to 'warm' the battery?

Finally, consider stripping/cleaning the starter motor and installing new brush plate.
« Last Edit: 07 November, 2019, 11:27:05 AM by Sidewinder »

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Re: Sprag clutch upgrade Tiger '07
« Reply #17 on: 07 November, 2019, 03:41:49 PM »
*Originally Posted by Paul2bikes [+]
Shouldn't a good battery show a minimum of 10v while cranking?

Think most say 9.6v absolute minimum, less than 9v though definitely aint good
Ex Sport owner now on KTM 1290 SAS

Offline Max

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Re: Sprag clutch upgrade Tiger '07
« Reply #18 on: 08 November, 2019, 09:31:13 AM »
*Originally Posted by Sidewinder [+]
Yes if the ECU sees the voltage drop too far it will disengage the starter relay.   Voltage shouldn't drop below 10-11v while cranking.

Have you checked the earth side?  Earth point on gearbox and neg battery terminal?

Also you have a lithium battery?  Have you tried putting the lights on for 30secs or a minute before trying to start to 'warm' the battery?

Finally, consider stripping/cleaning the starter motor and installing new brush plate.

Thanks for confirming the ECU story, it starts to make more and more sense.   

I disconnected and cleaned connectors on all cables including earth. So all the cables I'm about to replace with the upgrade kit.

Yes it's a Lithium, and I've tried warming it up, didn't help. And after some starting attempts one would think the battery also warms up?

I think the starter is not to blame, because when I shorted the solenoid it went round like never before... when I'm typing this I think it's really just too much voltage drop over the solenoid? I measure 4.7 Ohm over the solenoid terminals when its closed, read that "around" 4 Ohm is normal.