This will be my first post so please bear with me if I’m a bit noob-ish.
I am looking for Help / Advice bringing my 2003 WR450 back to its former glory.
So the story goes like this.
My WR450 was ridden both trail and road for approx 3yrs then due to a death in the family / the loss of the farm and my own kids being born the bike was put out of sight and mind. It has sat in a shed for the last 4 years to be exact!
Unfortunately it was not properly prepped before storage therefore was not drained of fuel, serviced or oiled. After much research I now realise the importance of this and my HUGE error in not doing so!
I have only recently been able to focus some money and attention on her with the intent to start riding again but can’t for the life of me get her started!
She did start and run reliably before storage, be it a little rough due to a broken mixture screw and also no working E-Start.
Here’s what I’ve done so far-
Full fluid and filter service with genuine OEM Fluids and Filters
New Starter motor
New Spark Plug
Removed the Carb (it was dry but full of varnish from old fuel)
Cleaned out and treated the fuel bowl and jets with carb dip
Cleaned the needle valve as when I re-installed the carb it leaked fuel like a tap.
Installed adjustable mixture screw
Now that everything is re-installed and back together I just can’t get any life into the old girl!
I’ve tried both electric and kick starting
Roll / Bump start
With and without throttle or choke
With “start you bastard” ether sprayed into the cylinder / intake
With fully charged jump starter connected
The closest that I got was one big backfire and flame pop from the exhaust on electric start?
I’ve checked and there is a spark, although it seems a little weak for my liking but I can’t find any loose earths or connections? Also should the coil boot grab the tip of the spark plug tightly? Mine seems to only loosely secure to the spark plug?
Would the spark plug be at fault seeing that it “has” backfired and popped a flame?
Sorry for the massive spill, I just figured the more info the better for you guys to help with.
I’ll keep trying and researching myself but any help or advice would be greatly appreciated J