I fired my 2007 Honda Rancher 420es up today and it ran fine ,started it back up backed it off the truck then it shut off,hard to start and then when you give it gas it dies.Then it would not start just try and backfire,nothing no start just turning over and back fireing occasionally.I checked my spark plug and its fine but the spark when you trun it over is strong and fast then weakens and slows,,seems like the efi system is loading the cylinder with gas then when I do get a good spark it back fires.any advice for today with the dealership closed,crank position sensor,???

 

If your dealer cannot help you out reasonably, PM me.
Last time I posted anything pertaining to 420 start issues I was verbally torn apart and the thread was deleted.
I know the answer

----- Gimpster -----

 

Most problems with the PGM-FI will show an MIL flash code with using the " FI " light .. Can you hear the fuel pump running when you try starting the bike..

 

spark plug waqs fouled,put new plug in and runs like a champ,no mystery ,crazsy stuff can make things go crazy i guess thanks all

 

It will do it again

----- Gimpster -----

 

hi Gimpster I have the same problem with my 420 could you possible help me out I am a mechanic and this thing has me puzzled

 

i have a Honda Rancher 420 2007 and I'm having starting issues wanting to backfire almost like bad gas any suggestions

 

Glimpster seems to have gone away, so has taken his secret with him. I go for a new plug, just in case, then a new "tea bag" filter in the canister containing the fuel pump. This usually sorts things out. Your 2007 machine will have a round tea bag, unless someone has done the conversion to a square one.