how would a piston get jammed?

[PinKcHicK]

I heard that if your piston jams, you gotta clutch in and balance.. and maybe pray hard.

 

is that true??

[kurarensu]

piston jam best is faster clutch in and try to brake and control.. =) normally the reason is due to improper 2t tuning(too little 2t flowing in) or worn out piston/block/conrod ? =x

[MrLester]

hmmm I am riding a honda NSR150SP FT plater.

 

Well congrats to me, my piston jammed again, This time round is my block went as well..

 

Well that is why in forum u can see me looking for block.

 

But maybe I will be getting a brand new block etc and will do up my whole bike,

 

change rear suspension,

block

piston

re spray

 

intending to ride my bike for another 1yr ++ till ORD. then changing to car I guess =) so maintain my bike so that it will serve me well.. =)

[stRobe]

I never owned a 2-stroke bike before, but im curious to know..

 

If piston jam then the rear whel will lock?

 

So this means that the bike will 'slide' forwards, even at high speeds right?

[boofeng]

I never owned a 2-stroke bike before, but im curious to know..

 

If piston jam then the rear whel will lock?

 

So this means that the bike will 'slide' forwards, even at high speeds right?

 

your engine is connected to clutch to the drive chain to the rear wheel. if engine jams, rear wheel cannot roll also. so, yes it will slide. unless you disengage the clutch. in which case the wheel can start rolling again.

 

so when your piston jams clutching in will help stop the sliding. playing clutch has a braking effect i think. and you can also use your normal brakes. it's never happened to me before so i don't know.

 

 

MrLester: hey maybe you have some problem other than piston/block? have you checked your 2T settings, or your carburetion? unless you maintain very high revs, PLUS clock high mileage, most piston/block can last quite a while. you also need a greater 2T ratio if you're revving a lot. read this?

[Aalex82]

I never owned a 2-stroke bike before, but im curious to know..

 

If piston jam then the rear whel will lock?

 

So this means that the bike will 'slide' forwards, even at high speeds right?

 

ya.. the rear wheel will lock..

cos the engine is force to stop, forcing yr rear wheel to stop spinning too..

it slide forward and left and rite too..

once experience piston jam, must clutch in straightaway..

[stRobe]

What about bikes with no clutch lever like the wave?

 

I read in the cubs section that piston jam is possible if engine oil change is very long overdue.

 

If the rear wheel locks, the only thing to do is pray?

[boofeng]

What about bikes with no clutch lever like the wave?

 

I read in the cubs section that piston jam is possible if engine oil change is very long overdue.

 

If the rear wheel locks, the only thing to do is pray?

 

try to shift neutral? try to control the slide (the fishtail) so that you come to a stop without letting the bike (and yourself) drop? all this while trying to use your front brake to stop the bike sooner (if there are no cars behind).

[stRobe]

try to shift neutral? try to control the slide (the fishtail) so that you come to a stop without letting the bike (and yourself) drop? all this while trying to use your front brake to stop the bike sooner (if there are no cars behind).

 

Ill keep this in mind..

 

But hope never to be in such a situation.. haha

[undead]

try to shift neutral? try to control the slide (the fishtail) so that you come to a stop without letting the bike (and yourself) drop? all this while trying to use your front brake to stop the bike sooner (if there are no cars behind).

 

This is worrying. How about scooter with auto gear?

If rear wheel jam and w/o possibility to clutch, what is the best option?

[Guest Eason]

if piston jammed the kickstarter will be loose as in when u kick start it will not be so hard to press down ????

[mdarto]

to prevent piston jam, my instructor told me to pour some 2T into ur fuel tank then shake ur fuel tank around. Just in case if ur 2T runs low in the 2T container, there will be at least some 2T in the fuel tank mix with the fuel which will at least help to lubricate the piston. Let's say if your 2T is low and you don't have enough 2T, use cooking oil.

[aRcHeR]

to prevent piston jam, my instructor told me to pour some 2T into ur fuel tank then shake ur fuel tank around. Just in case if ur 2T runs low in the 2T container, there will be at least some 2T in the fuel tank mix with the fuel which will at least help to lubricate the piston. Let's say if your 2T is low and you don't have enough 2T, use cooking oil.

 

that will cause excessive white smoke.. pouring 2t into the tank is also known as premixing.. a slightly lesser chance of getting a piston jam as the flow of 2t is dependent on the amount of petrol going to the piston, not thru the 2t pump.

 

use cooking oil? that i have yet to hear before..

[redbeacon]

if piston jammed the kickstarter will be loose as in when u kick start it will not be so hard to press down ????

I wouldn't take the ease of kickstarting as a gauge on whether the piston's jammed or not.

 

I'm guessing the design of the (kick) starter is different across bikes...when it's jammed, the lever will refuse to budge, or that the kickstart lever can still move...but since the starter is frozen in position because of the jammed piston, all you hear is clicks when you operate the kickstart lever.

 

Anybody here with a degree in bike-mechanic engineering here?

[panclanrider]

Let's say if your 2T is low and you don't have enough 2T, use cooking oil.

 

:faint:

[Echo]

few questions, if let say u pillion some1 on 2-stroke bike, will the piston has to work as usual or much more harder? i seem to guess the answer is the latter.. but guys here to advise?

 

And if the piston never overhaul before for a 13 yr bike, do u think the piston will stil work well throughout the 7 years?

 

out of topic question............ if regular top-up 2t tank, still need to premix? or both ways will be the best? any way to reduce smoke emission before inspection? clean carburator good enough?

[aRcHeR]

you only do premix if you are not using 2t pump. using both premix and 2t pump at the same time will cause excessive smoke.

 

if using premix only, best to warm up the bike properly before going to inspection. 2t pump, just ensure 2t flow rate is correct.

[blacktide]

is there by any chance a loose piston ring sounds like a key vibrating on a metal surface..??

my engine sounds something like that if i pillion sumone for long distances..

[RESPECT]

you can always ask our dearest amba (find him in racing section) he has jammed about 7 to 8 pistons in 18months riding a tzm. now he is a 4stroke LACER.

[RESPECT]

to prevent piston jam, my instructor told me to pour some 2T into ur fuel tank then shake ur fuel tank around. Just in case if ur 2T runs low in the 2T container, there will be at least some 2T in the fuel tank mix with the fuel which will at least help to lubricate the piston. Let's say if your 2T is low and you don't have enough 2T, use cooking oil.

 

you think this one honda cub ah? haha. drop from dunno which floor(10+) also can run. you can look for the video on youtube. the worlds best bike HONDA CUB.

[Jengo]

hey guys, any ideas or advices to reduce smoke emission before inspection?

[CoStar]

decarbonize ur pipe..if havent change spark plug..go change..new EO should do the trick

if u havent done any radical mods to ur bike..the emissions should be ok.

[buttbutt8]

BTW regarding white smoke = piston ring chui for 4 stroke bike... How much smoke must we see to confirm this?? Or issit any sign of white smoke = piston ring chui?? Coz i thot i saw some white smoke coming out of mi exhaust but mi bike is new.

[Guest Mr LPG]

If I may react to this one (stepped over from 2T to 4T just because of 2-stroke piston overheating; main cause #1 IMO is mixture to lean BTW):

 

4 stroke:

blue smoke = oil consumption: can be bad sealrings on the valve guides, carbon build up on the oil scraper rings, loss of compression (wear), too much engine oil...

whit smoke = wate consumption: head gasket blown, cracked cilinderhead. On a water cooled one off course. And, with a heated up engine

[CoStar]

i think if u see smoke on a 4 stroke..u need to see the doctor(mech i mean).