*WARNING*
Coming back to me, the suburban mechanic, this time I had a motorcycle that experienced gasping or smoking like a 2-stroke motorbike, which said that this type of motorbike was the first generation supra fit that came out in 2001.
The reason this motorbike emits smoke, there are many things starting from oil that is not being noticed and pistons that are getting old.
Specification:
Model: Honda Supra Fit
Year: 2004
Production: Indonesia
Machine
** Honda Supra Fit (2003)
** Engine: 4-stroke, OHC, 1 cylinder
** Engine capacity: 97.1 cc (100)
** Bore x stroke: 50 x 49.5 mm
** Compression ratio: 9.0: 1
** Max. power: 7.29 ps @ 8000 rpm
** Max. torque: 0.74 kgf.m @ 6000 rpm
**Air conditioner
** Carburetor: Keihin
** Ignition: CDI-DC, Magneto
** Transmission: 4-speed (N-1-2-3-4-N), rotary
** Clutch: centrifugal, wet, dual automatic
** Battery: 12V-5Ah
** Spark plugs: ND U 20 FS-U / NGK C6HSA
** Starter: electric and kick
This looks clear when you look at the bottom of the cylinder, the boring or bamboo part is very thin or over because this cylinder has been cut 6 times or lathe and the bottom of the gasket has also been badly scuffed, causing oil seepage to be like this,
The cause of blisters on the bottom of the gasket is that when it was unloaded before, it was not properly treated until it was like this.
This part of the bamboo can no longer be corrected because it is over.
This cylinder can still be used if the owner doesn't have enough money to replace it with a new one. The method is to replace the bamboo or boring part, but the price is not much different from buying a new cylinder.
This is in the chain link keteng or timing, this is already bad, to the point where the path ends like this I don't know how the owner takes care of the motorbike so it makes me shake my head😁😁 can the motorbike break down like this, it's like this motorbike isn't just using it but also in jajah if the engine is destroyed like this, how do I fix it again if not buying a new cylinder. if it is repaired again, this will definitely cost a lot of money because the process starts from re-casting in the timing path and then we turn it around. with a standard timing line size,
Yes, the cost is almost the same as buying a KW cylinder or counterfeit goods.
This looks like the inside of bamboo or boring which has made me laugh at the same time curious about the attitude of the motorbike owner and his own property. I think this is very bad because the scratches are almost 0.05mm deep. I think this is crazy.
We can see that the scratches are right on the piston pen, this scratch is caused by the broken lock of the pen so that the broken lock of the lock is sheared so that it causes a very deep wound until the motor is emitting smoke so badly.
And this is the piston or piston which has been subject to the effects of its boring itself, causing such a terrible smoke,
If the piston or piston is like this, it can't be repaired or recycled because there is no tool that can repair the piston, so if the piston is like this, it must automatically be replaced with a new one, but the piston ring is still safe or can still be used. , because the cause of the blackness of smoke was caused by a piston and boring which were badly damaged.
Here I forgot the photo on the side of the piston which is so clearly visible there is a part of the piston that is destroyed if you look at it from the right side, in the part of the piston pen lock has been lost so that the skilp or piston lock has no hold because the locking wall is broken due to a shortage. oil.
Used goods like this can still be used for motor reinforcements or up-drill motorbikes, because the up-drill motor that is needed is only the block because boring will be replaced with a bigger one, what's more, this cylinder is still very good, even though it looks dirty but the material is still guaranteed safe, that's the reason I don't throw used materials like this. Surely one day I need this item for installation on my friend's racing motorbike.
The message from all of these events is to avoid a fairly large loss, especially if you have to frequently change the oil, don't wait for the dirty oil until it thickens, what's more dry, another one for my mechanical colleagues is out there when you dismantle the machine, please glue the packing, not too much, it can. cause a blockage in the oil path so that the oil does not run smoothly.