Riding bike engine cuts out wont restart everything works but not heated grips

If heated grips have stopped working it is far easier and usually cheaper to completely replace everything than it is to buy a replacement part from the original manufacturer.
A friends grips stopped working and was quoted £60 ($100) from Honda for the switch alone. We removed everything and replaced with a good replacement (Dr Bike) for £30 ($50) with the added advantage of new soft grips. Not a difficult job at all and all at half the price. New sets come with full instructions unlike replacement parts that are aimed for mechanics who know what they should be doing.

fuel air is my first thoughts

• NOTE: A rich problem gets worse as the engine heats up.
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• NOTE: A lean problem gets better as the engine heats up.
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Check the cam pickup on the nose cone on the right side of your engine. With time, they go bad because of all the heat cycles they go thru. Works fine when the bike is cool, but when it heats up, the bike cuts out and runs bad and the speedo will jump around. If this is the problem, after you replace it, the bike will need to be timed.

Sounds like the starter relay is sticking. Then over heats the fuse and blows it. Check the relay and also check and clean the starter button to be sure it is not sticking on use contact cleaner. Be sure to read the label make sure it is safe to use on plastics.

If you remove the pass switch on the left hand switch housing you have room to fit the round rocker switch in the his housing. This makes for a very clean installation. Since in the day time I ride with high beams on the pass switch was of know use to me plus flashing your high beams at a car you intend to over take seems to produce a rather random out come. I traced out the diameter of hole I would need with a scribe and then trimmed it out with a Dremel, test fitting the switch as I went. Much safer then trying to drill a hole that large in a piece of plastic.

Left Side


Right Side



The empty three wire plug under the nose fairing is intended for the factory heated grips. I cut of the plug and wired into the power here. There are three wires, 12v hot, 12v signal, & Ground. The 12v hot use the fuse in the fuse box marked for the heated grips but remains hot even when the bike is off. So I wired in a 12v relay using the signal wire to switch the 12v hot with the ignition. This will prevent dead batteries if I leave the heated grips on or if a passer by feels the need to flip switches on my bike; it's happed before! You will be able to tell which is the 12v hot and 12v signal by pulling the heated grip fuse and seeing which wire remains hot.

Relay

hope this helps

John

Check the starter relay. Everything you're talking about gets it's power through there on the earlier bikes.

Hi
If all the electrics go off then :-
A) Check tightness of battery terminals & condition of battery
B) Check for dodgy fuse or dirty connections
C) Check voltage across battery terminals when engine running - should be at least 12.5v rising with increasing revs to 15v max - if not then suspect the regulator/rectifier unit or the wiring from it to battery

I hope this helps, if so please mark as helpful.
Positive comments always appreciated

Ride Safe
Bike-Doc

this is very rare. if the engine kill switch is in the same grip, check it , it may be shorting/ loose/ defective. only other possible thing is the starter relay switch

if when your bike gets to riding temp. and, you turn it off; and, then restart... if the crank speed is slow replace your battery if your crank speed is normal replace your ignition module (batteries can be recharged and, measure 12 volts and, still be weak)
Amps can fall off (amps are what give the battery muscle to spin your starter ) ignition modules can be affected by heat and fail to maintain spark

It sounds like something is preventing the bike from getting fuel. Check fuel filter, fuel tank vent, air filter too. If you have vacuum building up in the tank, letting the bike sit for a few minutes slowly releases that vacuum allowing the pump to pull fuel easily again for a bit. Next time the bike quits open your fuel tank. If you hear a whoosh of air being sucked in look for a plugged vent line. A plugged air filter can have a similar effect but the only way to check that is change the air filter or look at the one you have. It would have to be really, really dirty or plugged with some debris to cause this problem.