[Dragtower]

Hi guys and gals,
New to forum. Found because of problems, lots of good info here. Hoping for some new incite with my problem. Sorry about the long read. Original owner, total 850 miles on Eiger. Always ran great.
After couple months sitting, runs at idle with choke on but dies when trying to throttle up, this started to happen after the fuel petcock malfunctioned, and filled crank case with fuel, also thought fuel had gone bad.
1- Drained oil, replaced petcock, fuel, plugged vacuum line. No change in running it.
2- Rebuilt carb, new iridium plug, no change in running. Called friend that's a mechanic for advice, he came over to help.
3- Rebuilt carb again with him, same problem. Enough need this ATV running it's a tool.
4- Purchased new carb, air filter, gaskets for intake tube, and insulator. Would start, run at idle, dies trying to throttle up unless it sits, and idles for a long time then runs ok, thought well cold blooded, put it away for a day. Next day hard to start with choke on, once started wouldn't throttle up, but would idle badly, no throttling up.
5- Use 1 whole can of carb cleaner, and 1 can of WD looking for vacuum leaks. Found none.
6- In the mean time rebuilt old carb using Simple Green, and ultrasonic machine. Online with where I purchased the Suzuki brand carb $500+, I checked to see if they may have sent the wrong carb. Per the company it's correct, they checked with Suzuki. I checked with other websites which recommended the same carb.
7- Can't hurt to try old carb after 3rd rebuild with ultrasonic cleaner, so replaced the new carb. starts with choke on, after warm up will idle normally but will not throttle up.
8- Checked compression at 150psi, waiting for feeler gauges to adjust valves. Have to have offset gauges.
9- Ordered a new coil just in case. Shot in the dark.
10- After researching online found possible magnet could fall off of flywheel, so while turning engine over by hand I could hear a snap or click, thought possible magnet loose, after more investigation with stethoscope sounds like its coming from the upper end and not near the flywheel area. Now what could that be?
Thanks for any help.
Dragtower

 

[amcf18]

Not sure on the Eiger, but the Z has a decompress-er attached to the camshaft, that could be the click you hear.
Does Suzuki Spec an irridium plug, or is that your idea? I would go back to spec if it isnt.
Lots of fuel coming to the carb?
Did you replace the pilot jet in the rebuilt carb, and did you open the fuel screw to give it more fuel?
New carb should have ruled that out, but who knows.
Does changing the idle speed make any difference?
Air filter clean and healthy?

 

[Dragtower]

Not sure on the Eiger, but the Z has a decompress-er attached to the camshaft, that could be the click you hear.
Does Suzuki Spec an irridium plug, or is that your idea? I would go back to spec if it isnt.
Lots of fuel coming to the carb?
Did you replace the pilot jet in the rebuilt carb, and did you open the fuel screw to give it more fuel?
New carb should have ruled that out, but who knows.
Does changing the idle speed make any difference?
Air filter clean and healthy?

Iridium plug my idea, Changed back already.
Good flow of fuel to the carb.
Didn't replace any of the jets, cleaned thoroughly. Before rebuilding, screwed in and seated softly while counting turns 1 5/8, after rebuild set to same, and then tried in/out from setting. Bogging, and farting still.
New carb. worse than the old carb. Back on old carb.
Changing idle speed made no difference. Tried also to run with choke on until high RPM then backed off chock to see if there wasn't enough vacuum to pull fuel through main jets.
New oiled filter from Twin Air.
If I can figure this one out, I'll certainly post the results.
Thanks for the suggestions amcf18

 

[amcf18]

Did you run a welding tip cleaner thru the pilot to remove varnish?

 

[Dragtower]

Sorry for the delay in responding.
Cutting tip cleaners are actually too large, at least mine are, cleaned them out with a piece of small stainless wire. They where soaked in 30% vinegar, which amazingly cleans extremely well, removes all contamination. Learned that from a mechanic. Even regular vinegar works if left soaking for longer. Just a reminder that I purchased a new Suzuki carburetor part # 13200-38F4 also, it made changes but not for the good.
Just received the new coil yesterday, will install and report back.
Thank you

 

[Dragtower]

Replaced coil for no changes.

 

[Dragtower]

Update,
Finally broke down and took it to the dealer with old carburetor on it, the new carburetor Part number 13200-38F4 in the box, explained all of the work done to ATV. They checked the new carburetor part number that I had and informed me that it was the wrong one for the ATV. I explained to them the company that I purchased it from used my VIN numbers to order the carburetor. The dear used the vin number and came up with this part number 13200-38FD1. Told them to fix the ATV it's a tool for me, replace the carburetor. Picked up the ATV with new carburetor from dealer and it runs perfectly.
I have not said where I purchased the original wrong carburetor from because everyone makes a mistake, now I'm expecting that they will own it and return the cost of the carburetor that I purchased from them.
I'll keep you posted.