My header pipes on my z1000 1978 air cooled, glow red hot wen running. wots the problem it has please. only thing ive changed is the coils on the bike. it runs on k n ns air filters. bike runs and drives ok but lacks power at top end speed.

Check fuel mix for being too lean. It will run hotter. If you are caning it around, they will glow.

It sounds like the carb just needs to be adjusted. If the mixture screw (air/fuel) is too far in, it will cause it to run lean/hot. The high idle is also just an adjustment often cured when you get the air/fuel mixture set correctly. Back the mixture screw out in 1/4 turn increments (turn left) until it bogs a bit. Then turn SLOWLY to the right until it just starts to smooth out. Run it a bit there and see if it helps cool the head pipe down & lowers the idle. It really sounds like you currently have a lean condition.

Even when I run my bike pipe is so hot cant ride safely as I have to lift my leg out of the way bc pipe is burning hot. Without touching it already have burn scars on my leg.

That sounds like it is running too lean. You may need some carb adjustments to account for your altitude.

All the wrf's,250 426 400 etc. WILL heat up and boil if they are left running without being ridden.They need air to be flowing over the radiator.1 minute can be enough to get them hot if the choke is used.You wrote that this happened after an oil change.Did you previously let the bike sit and run?.Check your air filter is clean as this can enrich the fuel/air ratio and create extra heat.Main thing is ,shut the bike down if you are stopping for more then a very short time.To satisfy yourself,take the bike for a slow ride as it is warming up.It can take up to 1 mile to get proper temp. into the entire motor.Hope this helps

Air leak causing a lean fuel/air mixture, bad radiator cap killing pressure in the cooling system, low water in the radiator, plugged radiator, broken water pump, not using premium gas and a spark plug with the wrong heat range.

Please rate this solution. Thanks rodsixfifty! < cool name