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Enduro Engine 4 stroke (including EFI & Exhaust) 4 stroke engine, EFI, and exhaust discussion


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  #1  
Old 12-27-2016, 05:55 AM
60ratrod 60ratrod is offline
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Default ec400 cold start issues

so i'm having little luck finding an answer using the search function here on this. dead cold my ec400 will crank, but there seems to be something taking the battery's cca away from the starter unless i jump start it with either my truck or my battery charger/tender(the tender has a 2a maintenance and 8a charge mode). i had thought the valves to be suspect(i'd like the clearance spec's if anyone knows them since the manual i got with the bike is conveniently missing the maintenance part), but off charger/jump start source the bike cranks over really slowly and acts as if something is taking amps away from the ignition. what should i look at? on charger/tender or my truck, it cranks fast just like it should. this isn't an old carb'd jap bike so i'm a little lost. also, the kickstarter is a no go. it won't let me kick it hard enough to spin the motor fast enough
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Old 12-27-2016, 11:32 AM
Tafka Tafka is offline
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Dead battery? :/
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Old 12-27-2016, 03:48 PM
60ratrod 60ratrod is offline
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i don't think it's the battery cause it's brand new as of late october, agm, and was sitting inside for all of november and was only reinstalled after getting a new r/r almost 2 weeks ago and has been sitting with a tender since install. maybe it just doesn't have the cca that the bike needs.
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Old 12-29-2016, 02:54 AM
60ratrod 60ratrod is offline
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i confirmed the battery is good today. i took it off the bike and tender last night and left it sit inside on my plastic tool box over night and went back to pacific power batteries to have it tested. it had 12.76 resting vdc and 150 cca with their testers. so i yanked the cam cover and checked the valves, and only 1 intake was a little tight. not sure since i don't have a proper mm feeler gauge. it has .152 and .127 mm leaves, and the .127 goes in, but the .152 doesn't, so that shouldn't be too far out on ONE valve to cause a hard start on a 4 valve one lung motor. so i then went through EVERY starter connection minus the key and start button connections and cleaned them including the battery ground on the engine and applying dielectric grease, and it still cranks slow, but the choke function seems to be a lot better since it seemed to be back firing through the throttle body. any suggestions as to what else to look at? could it be bad gas since i don't know exactly how old the gas is that's in the tank?
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Old 01-20-2017, 12:57 PM
krolik_21 krolik_21 is offline
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Near throttle you have small black switch, use when cold for starting
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Old 01-20-2017, 01:02 PM
krolik_21 krolik_21 is offline
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I change my starter motor to honda cbr 600 or hornet 600. its bigger and much more powerfull.
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Old 04-27-2017, 03:47 AM
Yngvim Yngvim is offline
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Try to change the brushes in the starter motor. It is same as Honda Hornet 600, I have the part numbers if you want

Sent from my LG-D855 using Tapatalk
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Old 04-27-2017, 08:51 AM
60ratrod 60ratrod is offline
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yngvim,

go a head and throw those p/n's at me! it'll be useful to have if the mcct doesn't help. I might just pull the starter off and clean it too. I also think I need to look into the decompressor pin on the exhaust cam since they're known to be weak on the early 400's/450's.
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Old 04-27-2017, 03:32 PM
Gordonian Gordonian is offline
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Hi, l had the same symptoms as you with my 400 for the past 2 years. Always having to jump start from cold. I was using a cheap battery with supposedly 130cca. I've just bought and fitted a Yuasa and guess what, started no problem after not being run for at least a month. Try a Yuasa YTZ7S !!!
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Old 04-27-2017, 05:45 PM
60ratrod 60ratrod is offline
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gordonian,


I suspected the battery at first, but I took it back to the battery store and there they verified the battery is good, and showed me with their tester unit that it had 150cca. and the battery had sat inside, off charger, over night.
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