?sealed crankshaft bearings?

[Deleted member 12676]

Can anyone tell me which of the bearings listed on this page is correct for the HT Grubee engine?

 

[Barnfresh]

Don't know that I would want any kind of seal or shield on a crankshaft bearing but any of these folks should be able to supply you with the correct bearings for your crankshaft.

http://blowbyu.ca/

http://heliobikes.com/

http://sickbikeparts.com/

 

[Al.Fisherman]

Don't know that I would want any kind of seal or shield on a crankshaft bearing but any of these folks should be able to supply you with the correct bearings for your crankshaft.

http://blowbyu.ca/

http://heliobikes.com/

http://sickbikeparts.com/

The crankshaft bearings use a outside seal (bearing lubed with the fuel mixture), the clutch shaft uses a bearing with seals on both sides (no internal engine lube)

 

[CroMagnum]

You can pry the seals off if you like.

 

[Al.Fisherman]

You can pry the seals off if you like.

Not on the clutch shaft. That bearing needs to be sealed as the lube in the bearing is the only way that it will get lubed. Maybe on the crankshaft but without the inner seal the bearings are lubed with the fuel mix. Some engines have no seal (on the bearing) from factory, and this isn't good, although the crankshaft has a separate seal.

 

[Deleted member 12676]

Yeah, I would pry off the inner seal. Idea is to relieve some of the pressure from the non-bearing seals so they don't wear out as fast. Especially since I just increased the crankcase compression ratio.

If you have the dimensions of the crank seal then send them my way so I'll know which bearing to buy.

 

[Al.Fisherman]

For anyone wondering the bearing size (6202RS) ...it's 15mm X 35mm X 7mm. Both crankshaft and clutch shafts use the same bearings.

 

[CroMagnum]

Not on the clutch shaft. That bearing needs to be sealed as the lube in the bearing is the only way that it will get lubed. Maybe on the crankshaft but without the inner seal the bearings are lubed with the fuel mix. Some engines have no seal (on the bearing) from factory, and this isn't good, although the crankshaft has a separate seal.

Yup, the bearings need the seals and internal grease for the clutch shaft. On the crank bearings (same size) you can pry out the inner seals so the gas/oil mixture can lubricate the bearings. Since I buy the same bearings in bulk for use in both places, I have to remove the seals on the inside of the crank bearings.