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lpmundy

Joined:

Mar 13

Posts: 2

lpmundy says:

vtr firestorm running problems

hi folks,

i have a 1999 vtr firestorm which has been running fine as i use it regularly until a couple of days ago. the bike started fine and was ticking over ok then when i try to put any revs on it starts spluttering/mis-firing and eventually cuts out. i have replaced the plugs and still the same problem. could this be a problem with the coil ??

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  • Posted 2 years ago (13 March 2013 10:35)

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jaffa90

Joined:

Mar 09

Posts: 9004

jaffa90 says:

VTR

Welcome Ipmundy,when you start the bike from cold does the choke make the engine rev faster than tickover ? Say 3,000rpm or what? 

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kcmc

Joined:

Jan 08

Posts: 7732

kcmc says:

Honda VTR 1000 Firestorm 1999

Hi Lpmundy and welcome to the site :smile

With the info you have given it would be so hard to make a diagnosis,which is already incredible hard anyway without being able to hear and see the bike.The answer to your question could it be a coil is yes,but it could be so many other things as well.When you remove the plugs,were they both the same colour?or was one black or wet with fuel?.The thing is if the bike starts OK running on both cylinders then its probably not a coil,could be,but probably not,so it could be water getting into the plug cap and or the HT lead arcing to the cylinder head?.Try starting up and turn the lights off to see if there's any arcing going on,especially on the front cylinder,if possible have a bottle of water with a spray mister(atomiser)  and spray on the HT leads and plug caps while the bike is idling.It could be dirty fuel,a blocked tank breather,a pipe off the carbs,water and or debris in the carb float bowls,or even a hole or two in the carb slide diaphragms as the bike is now 14 years old.But saying all that i have replaced many cam-chain tensions on these bikes over the years and when one lets go,it often does the same thing(drops a cylinder when trying to rev it up until it cuts out) if it happens at high RPMs which would bend a valve or two.Has yours been a bit rattly lately? it doesn't have to be,they do just break,so as you see it's so hard to make a diagnosis with so little to go on:smilebut we try for you.Whats the milage?when was the oil last changed?hope this gives you a bit of a heads up?Good Luck

KCMC:tongue: 

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davidstowe358

Joined:

Jun 08

Posts: 185

running rough

check the diaphragm in the fuel tap i bet its got a small hole in it i've just changed one in my nephews vtr makes it sound like its running on one cylinder.

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