[kprey73]

got an issue with my 07 grizzly 350irs.
runs great cold but when warmed up it spits and sputters then backfires through the exhaust and dies.
try to restart, it pops through the carb a couple times and might backfire through the exhaust again (very loud). after a few minutes it does restart. any ideas?
carb?


CDI?


thanks

 

[dezz]

Start with inspecting the carb adapter boot for tears (boot between carb and cylinder head). If ok, then clean the carburetor.
There could be many things wrong....but try those first.

 

[guipago]

There's 100 & 1 things it could be so it's a matter of elimination to find the problem, simple things 1st.
Fouled spark, change it, what colour is it?
Air filter blocked with "stuff".
Water or "stuff" in carby bowl, drain into a glass jar for a look, best bet to is remove bowl ( bad float level?).
Read adjust valves, tight valves can create a bad seal when hot.
What was the last service type work done to the bike & how long ago, did problem start after doing any work to the bike even electrical?
Loose battery terminals?
Does it do it after hitting a bump?