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Author Topic: GT650 S/R Lugging/Power Failure  (Read 1295 times)

umop-ǝpisdn

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Re: GT650 S/R Lugging/Power Failure
« Reply #10 on: April 17, 2017, 02:49:19 AM »

Make sure they are the single output type. ie not the twin spark ones.

Early SV650. I forget what year model, but anything pre twin-spark.
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TheEhTeam

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Re: GT650 S/R Lugging/Power Failure
« Reply #11 on: April 28, 2017, 05:50:32 AM »

Hey there, so an update and a query.
My "new" used SV650 coils showed up today so I installed them after work. The boots that came with them were not corroded and looked in way better condition than my Hyo ones. So I took her out for a test ride through some back roads, down the highway and then back home. I want to say I felt a for sure power increase as well as the idle was very steady. However once again riding home on the short bit of back roads the problem arouse and started kicking around again unless I throttled well above 7k any gear. So perhaps are my "new" used ignition coils also faulty or can there be any other possible explanation?
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umop-ǝpisdn

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Re: GT650 S/R Lugging/Power Failure
« Reply #12 on: April 28, 2017, 07:16:19 AM »

The symptom is a perfect match for a bad coil, but I really don't know what to say, two sets of bad coils?? Seems unlikely.
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TheEhTeam

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Re: GT650 S/R Lugging/Power Failure
« Reply #13 on: April 29, 2017, 06:14:43 AM »

I'm not sure how some parts may affect performance but could it be rectifier related? Or perhaps a bad vacuum somewhere along the lines? As stated I can temporarily get past the lurching by revving then engine up which could be increasing voltage to spark plugs or parts and helping or adding fuel and the carbs are running lean?? Is there anything that would cause carbs to run lean while hot only. Could a bad charge appear when engine/parts are hot and resistance is increased causing misfires?

One more possible idea that could be overlooked I guess. I'm using CR8E spark plugs. Should I perhaps switch to CR7E?
Although both spark plugs currently installed are very very new and they look mint and seem to be in a healthy condition showing neither rich or lean; however one of the two happens to have a very slight amount of white dust on the outside tip of the ground electrode. I read that this can mean it's too hot?
« Last Edit: April 29, 2017, 07:25:33 AM by TheEhTeam »
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