Need guidance diagnosing no-start symptoms

[DGXSER]

Isn't the G model an 80 model, and therefore have the 80-81 style carbs with the push in float needle seat, that has an o-ring seal?

[crazy steve]

Isn't the G model an 80 model, and therefore have the 80-81 style carbs with the push in float needle seat, that has an o-ring seal?

Yep..... If you don't have the o-ring, they're not original carbs....

[TopCatGr58]

Hey LoHo,

I just have to ask, did you get the XV920 style float needles? That's what had been reported as the right size to fit, the XS viton tipped ones are too big and will stick in the seat. The other thing I remember reading about the swap is folks also putting in the plastic floats.

T.C.

[LoHo]

I took the carbs apart again. I have a Kawasaki that has an O-ring seal for the needle to fit into, but the XS has an O-ring that the seals the seat itself into its passage. I adjusted the floats to 23.0000mm, more or less, and did the "blow-through-the-fuel-line" test to check for needle sealing. Air bubbled around the seats for #1 and #3, which explains the overflowing carbs. Thanks for bringing the O-rings up, Diver Ray.

I have replaced the O-rings for all four, remeasured to 23mm, and will now put them back in. Again.

[BA80]

He specifies a G model. No Oring.

The G does have the O ring on the float valve skids. That could very well be the problem.

[skids]

Yep..... If you don't have the o-ring, they're not original carbs....

Yep, I stand corrected. Sorry about that! :-)

[LoHo]

For the first time in quite a while, Effing B**** started up and ran...poorly. I have to have the throttle WOT to get her to go, and must maintain some throttle to keep her going. Plug #1 was dry but carbony. Floats were set to 23mm, pilots are out 2 1/2 turns. She smoked quite a bit. I am assuming rich...what's my next move?

[DGXSER]

Having to hold the throttle wide open would indicate it is a rich mixture, your letting more air in. Did it run well with this jetting before you had the spark issues?

[BA80]

Let it warm up to operating temperature and do a sync on the carbs.

Counting turns on the mixture screws is a good place to start but since each cylinder is different the carbs will need different settings.

You can't really adjust things correctly until the engine is warmed up.

As DGXSER said, it sounds like it's still rich, flooding. It may be fuel from before though.

[motoman]

Let it warm up to operating temperature and do a sync on the carbs.

Counting turns on the mixture screws is a good place to start but since each cylinder is different the carbs will need different settings.

You can't really adjust things correctly until the engine is warmed up.

As DGXSER said, it sounds like it's still rich, flooding. It may be fuel from before though.

Been a few years since I've seen your scoot Larry. I presume it still has stock intake and exhaust?

[LoHo]

Yep, as stock as I can be. Same jets as when she ran great.

[LoHo]

Also, getting warmed up cleared up the smoking issue.

[soccer4m]

oil

Hi LoHo,,,I know it sounds redundant but if there is any gas in the oil from flooding, it will run terrible until the oil is drained and new oil is put in. SO,, if you are absolutely sure the oil is perfect leave it but if there is a chance its been flooded a time or two or there is a float issue,,,,change the oil and it will help. Good news about starting so the electrical issue is over, hopefully, good luck and keep us informed, the BTCH is back...................Mike in Sun Diego

[LoHo]

Yeah, Mike, changing the pick-ups regained spark. Number 3 isn't getting hot, and I know I have spark there, so it might be a stuck needle. At least getting it to run gives me encouragement to keep tinkering. Months of shooting blanks had worn me down.

[LoHo]

Well, #3 has almost no compression, so I guess I'll first check valve clearance. Hopefully, one is too tight and keeping a valve open...hopefully.