ny2001sxr700
New member
- Joined
- Oct 19, 2004
- Messages
- 26
Was at my dealership a while back and was discussing some of the maintenance things that should be taken care of before the season and was told that at 4000 miles I should put in new pistons and rings or I run the risk of "catastrophic engine failure" called two other dealerships and they recommended the same thing. Whats everyone's take on this. Sled is a 2001 sxr 700 with 3800 miles
Dave_Vmax600
New member
hahaha
nooooooo
those sleds are solid
nooooooo
those sleds are solid
richierich
New member
ya dont waste your money.that motor will go another 3800 miles
I would replace the piston rings it a fairly cheap upgrade for the long run.
taylzee
New member
I got the same motor. 7000 miles. I just took it down to check it out. The pistons look brand new still. All cylinders were within .001. Gonna put rings, and a bearing or 2 in but other than that it's going back together.
yamaholic22
Active member
pro116 said:
I agree!!! New rings in my two strokes every 3-4000 miles
taylzee
New member
Maybe your dealer is like the local one around here. doesn't know anything about anything. The ponly pistons I know of that were troublesome were out of the 600 twins.
ny2001sxr700
New member
- Joined
- Oct 19, 2004
- Messages
- 26
Thanks for all the replies, I'll put a new set of rings in it and let her rip for another year
Budweiser
Member
My 2000 has 8500 miles and still runs like the day I got it. I have a friend with same sled with 11,000 miles. Neither have been touched. All I have heard about these motors is they are bulletproof.
If it ain't broke...
If it ain't broke...
PZ 1
Member
- Joined
- Mar 12, 2005
- Messages
- 987
I agree-
If I was to replace engine and clutch and suspension parts as often as some say should be done, I would have to stop riding 2 or 3 times in a season and tear the sled down and rebuild it. Many, many sleds around with 10,000 and more miles and the original rings with good compression. I remember reading in a snowmobile magazine at one time that the rings should be replaced at 800 miles!
And how would worn rings cause "catastrophic engine failure"?
.
If I was to replace engine and clutch and suspension parts as often as some say should be done, I would have to stop riding 2 or 3 times in a season and tear the sled down and rebuild it. Many, many sleds around with 10,000 and more miles and the original rings with good compression. I remember reading in a snowmobile magazine at one time that the rings should be replaced at 800 miles!
And how would worn rings cause "catastrophic engine failure"?
.
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And how would worn rings cause "catastrophic engine failure"?
By letting the piston start to rock back and forth in the bore by reducing stability, this in turn leads to worn skirts on the piston, and instead of traveling straight up and down in the bore they begin to "rock" back and forth, this cracks the skirts off the piston and leads to major engine damage!
Its not really a hidden fact that the piston and rings are the heart of a 2 stroke engine, if they would operate without maintenance for thousands and thousands of miles we would all have one in our cars, they are lighter by more then half and they make more power, a 500cc 2 stroke can make as much power as a 1000cc 4 stroke! So why dont we have 2 stroke cars? simple answer and its not about emissions, that can easily be handled by direct injection standards.............its piston/ring maintenace is required!!! Not too many people would like to have the engine taken apart on their car every 10,000 miles for a ring job!!
heres a pic of what worn rings will lead too, keep on runnin them engines without ring maintenace, and this guy will visit you sooner then later.
If youll also notice the black in the picture on the piston BELOW the rings, this is blow by, exhaust gasses that are partially burnt being reinhaled past the weak rings contaminating the fresh fuel/air charge below in the crankcase, if you were to look at the cylinders from this engine they have black sooty deposits on the trnasfer port openings/sides as well. I must have typed a 100 times to compression and ring post, just because the sled has good compression doesnt mean the rings dont need freshend up, its easy to build compression and its a whole other ballpark to hang onto the pressure(the true ability of the rings sealing), which can only be checked with a leak down test, not a compression guage!
By letting the piston start to rock back and forth in the bore by reducing stability, this in turn leads to worn skirts on the piston, and instead of traveling straight up and down in the bore they begin to "rock" back and forth, this cracks the skirts off the piston and leads to major engine damage!
Its not really a hidden fact that the piston and rings are the heart of a 2 stroke engine, if they would operate without maintenance for thousands and thousands of miles we would all have one in our cars, they are lighter by more then half and they make more power, a 500cc 2 stroke can make as much power as a 1000cc 4 stroke! So why dont we have 2 stroke cars? simple answer and its not about emissions, that can easily be handled by direct injection standards.............its piston/ring maintenace is required!!! Not too many people would like to have the engine taken apart on their car every 10,000 miles for a ring job!!
heres a pic of what worn rings will lead too, keep on runnin them engines without ring maintenace, and this guy will visit you sooner then later.
If youll also notice the black in the picture on the piston BELOW the rings, this is blow by, exhaust gasses that are partially burnt being reinhaled past the weak rings contaminating the fresh fuel/air charge below in the crankcase, if you were to look at the cylinders from this engine they have black sooty deposits on the trnasfer port openings/sides as well. I must have typed a 100 times to compression and ring post, just because the sled has good compression doesnt mean the rings dont need freshend up, its easy to build compression and its a whole other ballpark to hang onto the pressure(the true ability of the rings sealing), which can only be checked with a leak down test, not a compression guage!
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taylzee
New member
Not to mention what it can happen to the pots.
Dave_Vmax600
New member
question...not to high jack but ....my 91 phazer has 8000 miles on it compression is 119 in each cylinder....im thinking if i should do rings? what do you think?
taylzee
New member
As mentioned By mrviper700, A compression test is a go no go test. To pass judgement on a motor as far as rings are involved you are looking at doing a leak down test.