Engine Stall

[coutuser]

Is engine stall under "motorcycle surges forward"or "engine stops"?

What are we supposed to do in an engine stall?

 

Got anybody experience aquaplanning? My instructor say just hold the handlebar tightly and dont brake but the book say apply intermitten braking.

 

Who is correct?

[nbk3]

i'll probably say, to clutch in, and signal + cruise to the side of the road before braking to a stop for engine jams.

 

 

if aqua planing, personally i'll recommend intermittent braking. but primarily to control the bike FIRST, ie: hold on tight and strictly control the bike.

[mechwira]

'engine stall' is specifically the engine stopping when you are moving off from stationary and you let out the clutch too suddenly. also when you engage gear from neutral without properly clutching in.

 

if the engine stops by itself when you're on the move, then the term is different depending on the cause, the most common being 'piston jam' or 'empty fuel tank'. in the case of a piston jam, you absolutely must clutch in, and then cruise and brake gently and safely. if you fail to clutch in, your rear tyre will lock causing a skid. in the case of empty fuel tank, the tyres will not lock whether you clutch in or not, just that if you dun clutch in, the bike will experience engine braking all the way to a stop.

 

aquaplaning is when the tyre is no longer in contact with the road and is instead 'sailing' on top of water. any attempt at braking, even gently, may cause the tyres to immediately lock. if you clutch in, then the engine no longer sends power to the tyres and you're at the mercy of what the puddle wants to do to your bike. if you suddenly change your throttle input, the total lack of grip in the tyres may cause loss of control.

 

hence, the best thing to do is to maintain watever throttle level you're at, grip the bike hard with your thighs, tighten your hands' grip on the handlebars but loosen arms to allow any weaving of the bars without losing control, and then pray hard. this would be the 'best' response but is still no guarantee you will come out unscathed. how alert you are and thus how well you respond this way, plus the speed and angle when your bike starts to aquaplane, your tyre condition, etc etc all determine your fate.

[coutuser]

piston jam: My instructor say immediately do the "SLOW DOWN" hand signal if you on expressway, then pull in clutch fully and cruise to the side.

 

Empty fuel tank: my instructor say put fuel tank to "RES"

 

Aquaplanning: So is must do intermittent braking or just hold handle bar and glide? different people say different.

[mechwira]

piston jam: My instructor say immediately do the "SLOW DOWN" hand signal if you on expressway, then pull in clutch fully and cruise to the side.

 

sure. if the bike nicely lets you do all that. imagine the bike suddenly feeling like you hard step the rear brakes and then the brake gets stuck. thats what piston jam feels like.

 

Empty fuel tank: my instructor say put fuel tank to "RES"

 

sure, if you have a reserve fuel cock. mine doesn. if your bike does, then its always a good idea to ruotinely practice reaching for the reserve cock in the middle of a ride, in the event of empty fuel tank.

 

Aquaplanning: So is must do intermittent braking or just hold handle bar and glide? different people say different.

 

i've already stated my opinion. even at the highest level of racing, experts dun always agree on a common 'correct' way of riding.

[coutuser]

sure. if the bike nicely lets you do all that. imagine the bike suddenly feeling like you hard step the rear brakes and then the brake gets stuck. thats what piston jam feels like.

 

hi mechwira, in that case what should be do in the event of a piston jam?

[mechwira]

hi mechwira, in that case what should be do in the event of a piston jam?

 

bro.... in several threads now i've given you my opinion of wat i think is the best response for all the scenarios you've been throwing out. i know there are different people saying different things. i dun claim to be an expert rider and i definitely dun claim that my methods are 'the correct answer'. in fact, God knows if 'correct answers' exist. if theres always a single correct answer to any hairy situation, MotoGP racers wont skid and crash. i'm sharing my opinion on all your scenarios.

 

for your benefit, i'll share again my opinion on piston jam. the very first thing i'd do is clutch in, and keep it in. then i'd find a way to cruise to the side of the road safely, and come to a stop.

 

the instructor's method of hand signalling to slow down and then clutch in and then go to the side, he's not wrong but its a model answer for an ideal situation. back in the eighties and early nineties when 2-strokers ruled the streets, riders have died when the pistons jammed and threw them off the bike. i would clutch in first just to make sure the bike doesn throw me off.