Losing faith in plug chop results

[pittss1c]

I did a plug chop, and one cylinder looked a little lean and the other had a wider band, but not very dark.

Just for fun, I increased the jet sizes from 165 to 172 to do another test where I should be plenty rich.

Well, I didn't feel like I lost any power, but now I am cutting out after running for a while in 6th at WOT. I am guessing that I am running the bowls dry of my PWK 28mm carbs. Should I assume any plug chops I do now are poisoned by the fact that I could be running lean due to a reduced fuel level in the bowl?

[Hulio-mv]

6th wot for a while is not good on anything you can run the carbs dry as well as you are burning alot more of your oil off at wot. plug chop in 3rd or 4th not 6th wot. imo

[gregrob]

What plug chop procedure are you using?

 

 

And yes, I would say you could have your jetting spot on or even a little rich but if your bowls run dry when you hold it open for long periods of time, you could be going lean.

 

Do you have a pingle?

Edited March 21, 2008 by gregrob

[pittss1c]

I just have the stock petcock. I am wondering if that will fix the behavior at wot.

 

For plug chop... warm up, put in new plugs, jump on and give as much throttle as possible and go through all gears till it tops out. kill switch and pull the clutch. remove the plugs.

not quite WOT for 1st and 2nd gear...I am trying to keep the front end down.

 

I am now just suspect that it might be running with bowls less then full bowls during the test (now that I know I can run them dry)