1982 Seca XJ750, ZRX1200 has company now.

[bikerphil]

I have tried to get a hold of Yahman about a year ago with no luck. My friend bought a Yahman YICS tool back in '18 for one of his XJ's and he leaves the tool installed all the time. He wanted another for his second XJ. I think they would be pretty easy to copy, not much to it.

[Bonz]

Most of you guys here won't know CaptainZap. He was a guru, lived north of me in denver. He got me to my first XS11 rally in 2011 out in Durango. He ran the tool in his 80G full-time as well. Going to that rally was the Genesis of the Colorado rally I started in 2014. Unfortunately there's only so much room on the ride and the command central location, however looks like 16 bikes this year. It's the old guard, guys that have been doing this since the beginning with me in 2014.

[Bonz]

Getting back to the Seca 750 as the summer progresses. Three and a half weeks to go on summer break before the ankle biters start showing up again.

Valves... one intake and one exhaust are way tight, IMO. As in .004" #2 exhaust (.006-.008 spec) and .002" #4 intake (.004-.006 spec).

As JeffH said to me recently, hopefully some adjustments start making logical outcomes. Nothing has produced the solution. Specifically #2 not firing at idle, and then fire intermittently as RPM increases. Something I haven't mentioned, #4 runs hot at idle via the IR thermometer reading. Maybe there's something in the tight intake valve on that cylinder, as again, logical adjustments/solutions have not given logical outcomes so far.

Motorcycle shops are closed on Mondays, as they probably are everywhere else. Will make the rounds to a couple local shops tomorrow and swap a few shims with them.

Hopefully tomorrow I'll be able to check this off as a solution or just another step in the process.

Fwiw, used the "zip tie" method (but used a bent piece of 12 ga coated wire) to hold the valves open to pull the shims on all buckets (whether needing adjustment or not) to note sizes after taking measurements. Felt better using the wire as I was neurotic a zip tie could break and be a pain to get out.

For pulling the shims, used a small flat blade screwdriver in the bucket cut out, pried the shim up just a little bit, keeping the screwdriver in the small gap. Put a small squirt of brake cleaner into the gap, pushed the shim back down then repeated once or twice, and the shim popped right out with the screwdriver. I had ordered a dental cleaning kit with a pick and plaque scraper from Amazon for 6 bucks but after using it on the first shim, the method evolved to just using the screwdriver and it was easy peasy.

[cajun31]

I just did a search on Ebay for a set of carbs for your bike and there are several listings available. Saw one set for $99.00.

[Bonz]

The carburetors are not the issue. I've done enough of them to know when they've been cleaned thoroughly, with all candor. They have been taken apart and ultrasonically cleaned and put back together basically new. It's not them.