misfire??

samuelhann · Post by **samuelhann** » Thu Jan 17, 2008 6:03 pm

heyyy is there any common cause of a misfire on the zxr400. wen its cold it misfires but wen its warmed up its ok. im kinda thinkin coil but they usually break dwn wen hot. i have new sparklers bt agen thts normally unda load. ne ideas ???? overfuellin etc???

Post by **masterofinsanity** » Thu Jan 17, 2008 10:10 pm

if its doing it when cold i would say its more a fuel or spark plug issue.

RedexRobB · Post by **RedexRobB** » Fri Jan 18, 2008 5:15 pm

Cheack the HT leads mate, my XJR400 had a misfire for the 2 years that i owned it, i always put it down to the valve oil seals leaking oil as is belched white/blue smoke when it fired up. I started it one day with the tank off and saw a bright blue spark jumping from one of the leads!

kion · Post by **kion** » Fri Jan 18, 2008 6:44 pm

carb icing. let it warm up b4 u ride for 3 mins or so.

Post by **rover220** » Fri Jan 18, 2008 7:02 pm

kion wrote:carb icing. let it warm up b4 u ride for 3 mins or so.

highly unlikey this is the problem.

kion · Post by **kion** » Fri Jan 18, 2008 7:44 pm

y, its winter, he says it gets better as it warms up, sounds like carb icing to me.

Post by **Northern ANdy** » Fri Jan 18, 2008 8:16 pm

but the temp hasn't been anything like cold enough for the last week. And carb icing gets worse with engine running time.

Post by **rover220** » Fri Jan 18, 2008 8:18 pm

Northern ANdy wrote:but the temp hasn't been anything like cold enough for the last week. And carb icing gets worse with engine running time.

its not just cold temps that can do it but yes, if it is carb icing it should get worse as the bike has been running longer.

www.zxrworld.co.uk

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