Cold weather starting - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
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post #11 of 18 (permalink) Old 11-14-2018, 10:58 PM
Grand Prix 250
Main Motorcycle: TT900
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Location: Gabriola Island, BC, Canada
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Other Motorcycle: SV1000, XS11, XS400.
Extra Motorcycle: XS1100 Trail90
If it fires just after you take your finger off the button, that would indicate something is drawing too much power. As in volts.
On my 79 1100 Yamaha, I removed the headlight relay, as it was not working as planned. So the headlight comes on when the key is turned on. Yami fires right away, even without a headlight cut out switch. The starter is usually the biggest current draw, or it should be.
I may have more to say after it gets closer to freezing, about my 900 Trophy.

UK
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post #12 of 18 (permalink) Old 11-14-2018, 11:08 PM
Powerbike
Main Motorcycle: 2014 Bonneville
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Location: Huron County, ON
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Other Motorcycle: 2007 Ural Patrol
Extra Motorcycle: 2008 KLR 650
Have you tried tweaking your idle speed up a 1/4-turn, or opening the throttle just a crack while you crank?
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post #13 of 18 (permalink) Old 11-14-2018, 11:18 PM
Grand Prix 250
Main Motorcycle: TT900
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Location: Gabriola Island, BC, Canada
Posts: 76
Other Motorcycle: SV1000, XS11, XS400.
Extra Motorcycle: XS1100 Trail90
Quote:
Originally Posted by Mike K. View Post
Have you tried tweaking your idle speed up a 1/4-turn, or opening the throttle just a crack while you crank?
My Trophy responds to a slight throttle opening after a couple of cranks, and the first indication of fire. The manual says to leave it alone. But I would prefer to have it start. My XS400 is the same as it gets colder. My SV1000 Suzuki also the same. The 79 Yamaha is the only one that fires right away, and does not require any throttle.
All have carbs except the Suzuki which is FI with a magic box. ECU I suppose.
We have come a long way from tickling the carbs and push starting.

UK
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post #14 of 18 (permalink) Old 11-14-2018, 11:39 PM
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Main Motorcycle: 2014 Bonneville
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Quote:
Originally Posted by Unkle Krusty View Post
We have come a long way from tickling the carbs and push starting.
One frosty morning in Saltillo I had to hold my lighter under the bowl of my KLR650 for a few seconds to get the gas to vaporize enough to get it to start. Unlike in Canada and the USA, it seems Mexico does not change formulations to account for seasonal changes, even though several regions can get freezing temps at night in the winter. In cold temps, I find boosting idle speed 1/4-1/2 turn helps starting on any bike I have owned (Honda CM250, KLR650, Ural), even my 2014 FI Bonnie. The Bonnie seems to need some throttle on very humid days as well as cold ones. I love being able to push start. I get nervous out on the highway on my Bonnie because the battery is 4 years old now and push starting is impossible afaik.
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post #15 of 18 (permalink) Old 11-15-2018, 10:02 AM
SuperBike
Main Motorcycle: 2002 Triumph America
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You might also consider having it's valve clearances checked. This is known to cause these issues. These carburetted twins usually start like a dream. Mine ('02) has stock everything. Just big jets and aftermerket mufflers. It starts in about 2-3 revolutions every time, hot or cold, even on this crappy gas we get here in California. They seem to be a lot more trouble free than the injected ones. ...J.D.
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post #16 of 18 (permalink) Old 11-15-2018, 02:23 PM Thread Starter
Grand Prix 125
Main Motorcycle: My '06 America
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Location: Bulgaria
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Thanks to all who posted replies. Weather is now against me to ride so time to put it into hibernation. However I will be checking and testing the components that have been suggested by your goodselves. It may take a while but will let you know how I get on (or not).
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post #17 of 18 (permalink) Old 05-06-2019, 02:17 PM Thread Starter
Grand Prix 125
Main Motorcycle: My '06 America
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Starting Problem Sorted

Hi Guys,
Thanks to all who suggested various fixes for my starting problems last year.

Eventually I found that Both ignition coils were suspect. Off-load secondary coil resistance checks didn't bear any resemblance to those specified in the Haynes manual. The primary windings appeared to be in-spec.
I purchased a new pair of coils last month and after fitting them the bike started up immediately as it should with no delay or prolonged turning of the starter motor. Now just waiting for good weather to give it a blast.

Still can't see why both coils failed at the same time.

Thanks again
Papageno
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post #18 of 18 (permalink) Old 05-22-2019, 07:26 PM
SuperBike
Main Motorcycle: 2002 Triumph America
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Coils. That makes perfectly good sense. ...J.D.
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