My pipes on cylinders no.2 & 3 are glowing and extremely hot. It's a 2001 Kawasaki zx7r. I jetted the carburetors and checked the electrical. What can you suggest. Thanks for any help you can provide. B. ninja

You probably have a stuck or maladjusted float in the carburetor.

check the fuel tap & filter that it is not clogged with debris from the tank & the breather pipe

If it's misfiring and running hot, this has nothing to do with a voltage rectifier. It sounds like you've got an extreme lean fuel-air mixture for some reason. They do come from the factory jetted very lean due to EPA regulations but if you've got a manifold vacuum leak, it will cause a misfire and the engine to run extremely hot. I'd check the manifold seal behind the carb, the vacuum hose fitting on the backside of the carb, and the gaskets where the intake bolts to the head. If the slow jet is a #42 jet, I'd go up to a #45 and put a 0.020" thick washer under the needle to raise it just a bit to erichen the mid-range mix just a tad. That is if the bike still has the stock carburetor on it.

Good Luck
steve

Hi and welcome to FixYa,

If all 4 have sparks and 1 cylinder is colder than the others, then it would be fuel starvation on that cylinder. Almost always, it would be a carb problem. The carbs would need to be pulled down, stripped & dis-assembled and all non-rubber parts soaked in carb cleaner. Particular attention/cleaning to the jets and all the small / pin holes. Note the number of turns on the air pilot screw. Ensure float works on all specially the one for the cylinder that is cold.

Good luck and thank you for asking FixYa.

Your timing may have skipped a tooth. This causes the glowing pipe. Ther are 3 positions that look like tdc. The flywheel has "I" "T" and range marks. This can be confusing. Put the "T" on the mark and you will run perfect. If not you can set it up one tooth or down one from that position. One setting makes the bike run like ****, the other one is barely noticeable more or less power. You may have to play with it a bit to get it right. If your pipe still glows after redoing your timing then your can change up your jet to a higher flow. Usually a performance filter will lean out the mix causing a red pipe. To much fuel just fouls the plug. I deleted my filter box and put a cone K&N filter. I had to jet my carbs to compensate for all the extra air flow. The bike had more power after I did this. The main jet I used was 127 or some where around there, the stock jet is 115 I think.

To much gas would never make you glow. Timing being off or being to lean will.