Bike start up issue..help?

[r0g3r]

hey everyone,

so i've been having problems with my bike starting up on COLD days.

On a normal warm day, it fires up right away but on cold days it just won't fire up. It turns over but no spark/start.

I wanted to ride to uni today but since it was cold in the morning (the bike is outside), it just wouldn't fire up; just turned over.


Any help on what the problem could be? and how to resolve it?

thanks for your help!

[revelations]

Uh? type of bike? miles? age? mods?

[r0g3r]

sorry

1990 Yamaha FZR600

29xxx

no mods.

[revelations]

a) battery is suspect (lower temps, less voltage to the plugs)

b) carbs need tuning/cleaning

c) cold-idle switch isnt working

[r0g3r]

what can i do for the battery?

i opened up the carbs few months ago and they were clean completely



which is the cold-idle switch? Sry I'm not too experienced

[revelations]

Well if youre not using the cold idle switch, or choke as its called on some bikes... that would likely be your problem.

[RedlineMS]

It could be all those things but it could also be that your valves are getting tight. Starting problems can be a symptom of valves being out. They should have been done at around 26,000 kms