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Post by ricardoguitars on Mar 6, 2015 14:37:45 GMT -5
I don't get it, why a gasket if there's no fluid or air coming in or out of there?
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Post by chucky on Mar 6, 2015 15:01:38 GMT -5
Dust
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Post by rcq92130 on Mar 6, 2015 15:10:00 GMT -5
But the front of the cover is a nice big opening. Dust'ent make sense. |
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Post by JerryScript on Mar 6, 2015 15:26:38 GMT -5
The gasket absorbs some of the vibrations, and prevents wear between the metal engine case and CVT cover. It is definitely not essential, I have not had one on my 50cc since I installed my BBK a year and a half ago.
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Post by ricardoguitars on Mar 6, 2015 19:55:13 GMT -5
The gasket absorbs some of the vibrations, and prevents wear between the metal engine case and CVT cover. It is definitely not essential, I have not had one on my 50cc since I installed my BBK a year and a half ago. I guess the engine would be long gone before metal fatigue causes failure on the case  |
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Post by JerryScript on Mar 6, 2015 21:45:17 GMT -5
More to mask the noise I think
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Post by geh3333 on Mar 6, 2015 22:04:15 GMT -5
The gasket absorbs some of the vibrations, and prevents wear between the metal engine case and CVT cover. It is definitely not essential, I have not had one on my 50cc since I installed my BBK a year and a half ago. Same here ,haven't had one in yrs. |
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Post by rockynv on Mar 7, 2015 10:04:02 GMT -5
Prevents oil leaking from engine from contaminating the belt and clutch and makes up for imperfections between the castings so that the cover dosn't crack during initial assemble. The front opening is supposed to have a filter on it to prevent road dust and sand from getting into the CVT. Most aren't as well designed as the Piaggio which has a much larger surface area and can go 3,000 to 6,000 miles before the CVT filter needs cleaning. It also helps maintain airflow through the entire CVT from front to back so hot spots do not develop by cooling air exiting prematurely. Having slight pressure inside the CVT cover helps promote heat transfer as does the pressure transition when air exits the lightly pressurized CVT case.
All part of a balanced design however many miss the mark on this point,
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Post by lain on Mar 7, 2015 12:37:52 GMT -5
I don't see much of a point either. When I first got my scoot about a year and a half or so ago the CVT case cracked and I had to replace the cover. When I did I could not get the new gasket to stay on because I did not have those guide things that stick out of the CVT case into the block. Since I could not get it on then I just never bothered, the only place dust comes in from anyways is that huge air port on the case facing the front of the scoot. I have the rubber "filter" on it but it on'y protects from large rocks and whatnot. I once got a tiny rock in there through the air port that destroyed my first belt, I have thought about putting a mesh screen in there but haven't had any issues since and I use kevlar belts now that hold up to abuse.
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Post by geh3333 on Mar 7, 2015 18:47:30 GMT -5
I don't see much of a point either. When I first got my scoot about a year and a half or so ago the CVT case cracked and I had to replace the cover. When I did I could not get the new gasket to stay on because I did not have those guide things that stick out of the CVT case into the block. Since I could not get it on then I just never bothered, the only place dust comes in from anyways is that huge air port on the case facing the front of the scoot. I have the rubber "filter" on it but it on'y protects from large rocks and whatnot. I once got a tiny rock in there through the air port that destroyed my first belt, I have thought about putting a mesh screen in there but haven't had any issues since and I use kevlar belts now that hold up to abuse. The first engine that came with the scoot had a filter that was sorta curved downward. It had a fine screen inside that filtered most dirt that would try to go through . the new engine came with one that just has bigger holes in the rubber with no type of filtration. |
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Post by rockynv on Mar 8, 2015 0:10:34 GMT -5
I don't see much of a point either. When I first got my scoot about a year and a half or so ago the CVT case cracked and I had to replace the cover. When I did I could not get the new gasket to stay on because I did not have those guide things that stick out of the CVT case into the block. Since I could not get it on then I just never bothered, the only place dust comes in from anyways is that huge air port on the case facing the front of the scoot. I have the rubber "filter" on it but it on'y protects from large rocks and whatnot. I once got a tiny rock in there through the air port that destroyed my first belt, I have thought about putting a mesh screen in there but haven't had any issues since and I use kevlar belts now that hold up to abuse. The first engine that came with the scoot had a filter that was sorta curved downward. It had a fine screen inside that filtered most dirt that would try to go through . the new engine came with one that just has bigger holes in the rubber with no type of filtration. Like I said many miss the mark and are not well thought out. I have to give Kudos to Piaggio for the structural design of the cover even having an outer bearing to help support the end of the clutch shaft while providing cooling airflow and good filtration. If you clean the filter in mild soap and water every 2,000 or 3,000 miles you will rarely have a problem with the Piaggio design. I expect to get around 50,000 miles from my OEM variator and pretty close to the same from the clutch on my Piaggio powered Aprilia 250. Owning the $2,999 Aprilia 250 has been quite a refreshing experience for the most part and I really believe the Chinese should consider using some of the concepts from the Piaggio bikes to improve the current GY6 models they make. It would not take much and would vastly improve the bikes. |
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