(05-10-2019, 02:30 AM)Houtman_imp Wrote: I am not so certain that it is the plugs, could the reflash perhaps messed things up ?

(05-10-2019, 10:10 PM)jimgl3_imp Wrote: $12 on amazon

https://www.amazon.com/NGK-LMAR8A-9S-Spark-Plug/dp/B006DI4AT0

(05-10-2019, 01:42 AM)mvk24_imp Wrote: Hey guys, 6 years later are there any other spark plug options out there now? I had my ECU flashed by Guhls, Speed limiter and Ignition Timing, didn't get to ride it much this winter but now that I've been out for a few days the bike has plenty of power but doesn't want to just "Cruise". I used to do 60-70mph in 6th gear no problem (alot of highway). But now it barely wants to maintain 80mph without acceleration in 6th gear. Even in 4th or 5th if just feels like it wants to bog out unless I'm accelerating. And the slightest twist of the wrist almost makes it jump at those speeds.

I just went over the 10k mile mark, stock headers, Shorty GP exhaust tip, ECU flash by Don for speed limiter and Ignition timing, Honda CB500 handlebars, everything else is stock.

I checked the air box and filter - Clean no issues
Changed the oil and filter to Honda GN4 new formula( whatever it's called) oil
Pulled the plugs and they looked almost perfect, little white on the top and little black on the threads so I put them back in and it was still doing it.
So last night I pulled the plugs, hit them with WD-40 and gave them a gentle nylon brushing to clean and gap them.
Put them back in today and I'll see what happens but the only thing I can think of is maybe it just needs new plugs? But can't find them under LMAR8A-9S now?

I have also noticed the top crankcase breather has been full again in the last 500 miles, the bottom has been bone dry, the oil already looks like cuss ans low in the window and I literally just did the oil change maybe 500 miles ago with no obvious leaks... I kinda wanna change the oil and plugs and see where this goes but do we have any ideas?

Valve cover was done by my local shop when they sent the ECU to get flashed so if anything was weird in there I would've known back in October when it was open.

I think that's a long story to get to the punch line of - should I change the plugs and what options are out there now in 2019
Wait also when I checked the plugs the first time I forgot to put the harness back on the far right plug and started it. Ran it for maybe 5 seconds and when it didn't sound right I realized I forgot to cap that plug and turned the bike off. Almost seems like the cruising issue has been since then? Could the brief misfire have messed up the ignition timing or plug somehow?