Instead of fighting with this thing further with the hard starting/cold running/idle issue, I am about ready to just throw in the towel & go for an aftermarket carb.

Has anyone put an Edelbrock or other carb on their 660? Any input/ideas/suggestions welcome. I know it is a costly shot in the dark, but unfortunately I live in an area where the shops aren't very competent on

repairs, so I am forced to pretty much diagnose/troubleshoot on my own, or shell out handfuls of money to the shop only to get it back in the same condition as before...

Thanks!

 

Are you sure you just don,t need a free carb cleaning? We go ice fishing with a 03 660 grizzly all the time up here in Northern Ontario Canada.

 

Never seen one on a Grizz but have on a Raptor. Nice step that solved allot of issues including cold start.

 

TLC -

Once the weather breaks & I don't need to use it for plowing anymore I will disassemble it for (another) good carb cleaning. For the time being, I may run a can of Seafoam through it; I read that a fellow did that on another forum & it really helped out a lot.

Dodge -

The Raptor has the same engine doesn't it? Hate to spend $350 on this fix, but I don't see much of an alternative. When I search the 'net, I see this problem time & time again with the Grizzly engine.

I guess they must have put junk carbs on these things...

 

Yes both engine are basically the same. Here is some more info for you to look at.
EDELBROCK GETS 27.9 HP FROM 2002-07 YAMAHA GRIZZLY 660 WITH THE ALL NEW #3205 40mm PERFORMER SERIES CARBURETOR

 

Ouch! That carb is $400 +!

Don't know if I can justify spending that or not on a "fix" that in my opinion Yamaha should have made it right from the start. Spending that on an upgrade is one thing, but this is just a repair to get it running "normal".

Well, ok - there is that 10% gain in HP...will I even notice that?


Will have to give it some considerable thought...

Anyway, thanks for the info.

 

Like they say got to pay to play LOL It does suck to replace a part that should have been corrected from the get go but if that is the only problem you have I dont think you have much to complain about, esp for a gain in performance over stock. Good luck let us know what you decide/do.

 

Just a thought, have you played with the pilot jet sizes any to get more gas to it at idle? I have an '01 600 grizzly that had a cold start issue and I jumped it up one and it helped. My warrior is having carb issues also, I wish Yamaha would have used keihin carbs, I have never had any issues with theirs.

 

Kevin -

Nope - I haven't changed any of the jet sizes. I purchased a (stock) rebuild kit from the Yamaha dealer last fall & that didn't change things at all...well, not very much.

My initial prob. then was a stuck needle/seat, so we cleaned the carb (several times by now) & also had a *competent* shop clean it. It will at least start & run now, albeit the cold running/sputtering issues.

I came across another forum thread today where the fellow said he ran Seafoam through his misbehaving Grizzly & it worked wonders for him.

So, made a quick trip to A-Zone & picked up a can & dumped it in the fuel tank. I will ride it every day for the next few weeks to get the stuff worked through the system...we'll see how it goes.

 

If you've cleaned the carb completly then the seafoam won't help the carb. It might clean some carbon build up inside the head though, so worth a shot.

The 660 motors are known for the intake valve clearance to tighten up, especially the center valve. Adjust the valves and I bet your starting issues will be solved.

Kevin R. had a good idea also. A $5 pilot jet is alot better than buying a new carb. Your stock jet should be a 40. Try a 42.5. The aftermarket carb will still have to be tuned correctly for your area to start and run right.

Also I see alot of people cranking the choke all the way over to start the bike. Most of the time you can get away with 1/2 choke or less if it's jetted correctly.