I have an '06 WR 450 with a carb (not FI)
I have checked all of the valve clearances a short while ago and they are in spec
If I have started the bike recently ( within 1 week) it lights almost instantly
If I have not run the bike in 1 - 2 weeks, it is incredibly hard to cold start.
Ambient outside air temp does not seem to matter too much ....ie, warm or cold out same problem
Here is my theory, and I'd like to bounce it off people who know and own this bike:
I think the fuel cock leaks just a tiny bit
I think the bike is basically a bit flooded when this happens
When I put the choke on to cold start it probably makes the situation worse.
To test this theory, If I have not run the bike in a few weeks I should start it as if it is a flooded bike and see what happens
Hold bike at WOT and hit the starter
If it starts better, my assumption is prob correct
If it does not, back to the drawing board I guess
Has anyone had a problem like this?