Main Motorcycle: Bonneville T100 Black2012
Join Date: May 2012
Location: South Australia
Other Motorcycle: prev: BSA,Suzuki,Yamaha
Extra Motorcycle: I Wish
|Air Cooled Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, Bobber, T100, Speedmaster, America, Thruxton, and Scrambler.
Sponsored by: Triumph Twin Power Ltd
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my test point for the voltage readings was at the battery as it is the source of power, therefore any readings would be constant to the rest of the system, as the distance of all wiring on the bike is very short any internal resistance in the wiring would be pretty negligble.
Since Forchetto has listed the battery type used, I did a quick search on Yuasa battery web site for the battery specs. The YT12B-BS battery which I assume I have without looking is a 10AmpHour battery with a C.C.A @ 0degrees F 215Amp. This means my cold cranking amps of the battery is 215 amps before the battery voltage begins to fall below 12v (approx).
Triumph have been looking for a quick and easy fix already. When the EFI bikes came out they fitted an even smaller battery to accomodate the ECU and a plastic wedge separator next to the battery. This became part YT12B-BS which is around 18mm narrower than the previous carbed battery, the YTX12-BS.
Following people lining up to complain about battery troubles they hastily modified something in the airbox-ECU layout and replaced the previous larger carbed model battery on the EFI bikes.
On the SE at least this took place form VIN number 463262.
What battery do you have on yours?.
I have this issue as well (2012 SE), but at least one time recently it was more than just a minor nuisance, requiring multiple pushes on the starter button before the starter motor would crank long enough to start the bike. Since I was far from home at the time, it was an unnerving experience.
I have two questions that I am hoping more knowledgeable folks might be able to answer:
1.) Are there any aftermarket tunes that change, or could be requested to change, the voltage threshold for starting? In the car world, these days it seems like virtually any ECU parameter can be changed, so I'm wondering if it's the same for bikes.
2.) Does anyone have a recommendation for a specific brand/model of battery that will fit our bikes and provide the highest possible cranking power?
Other bikes I have owned were either old or old-tech, so I am at a loss on this issue. Any input appreciated.
OK, so unless there is some feedback loop I see no way that it could cause the starting issue we're discussing. This has to be related to the battery as stated above.
I hear what you say, but my personal experience is that if I use the control as per the handbook I have no starting problems.
If I don't use the control (which is rare now) then I can have these problems.
The thing I'm trying to put across is, why would you not follow the mfr handbook starting instructions? And when you experience difficulties (not using this control) why wouldn't you use it, just as a trial for a few days to see if it resolves the problem.
After all, Triumph didn't put it in the handbook for fun, did they.
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