Hi all,
I split the cases on my Stella 150 4-stroke manual to rebuild the cush gear. But now I'm all the way in the engine I would like to replace the crankshaft main bearings as well.
The current bearings have 5000mi on them and especially the left one has some axial play. Is there a replacement alternative for the Indian 'quality' bearings? If I search online for the part number on the bearing, nothing shows up.[/b]
Main crankshafts bearing alternative [Stella 4-stroke]
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- az_slynch
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It's the same bearing used in the pre-LEADER Vespa ET4, the Italjet Dragster and the Gilera Runner engines. Similar ID and width to a 2T bearing, but markedly bigger OD.
Part number is NTN SC05831CS37. Dimension is 25mmx68mmx12mm.
I got two sets, one for my 4T and one for a friend's 4T. Had to source them from SIP in Germany. Still need to pop the crank apart and find a decent big end bearing replacement option.
Part number is NTN SC05831CS37. Dimension is 25mmx68mmx12mm.
I got two sets, one for my 4T and one for a friend's 4T. Had to source them from SIP in Germany. Still need to pop the crank apart and find a decent big end bearing replacement option.
Last edited by az_slynch on Wed Feb 01, 2017 1:21 am, edited 1 time in total.
At what point does a hobby become an addiction? I'm uncertain, but after the twelfth scooter, it sorta feels like the latter...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...
- Neurotic-Hapi-Snak
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That's good to know. I have a suspicion that the "bad cranks" that kill 4T engines, are actually bad bearings. Do you have a list of the other bearings? Like the camshaft bearings? Are the transmission bearings same as the 2T?az_slynch wrote:It's the same bearing used in the pre-LEADER Vespa ET4, the Italjet Dragster and the Gilera Runner engines. Similar ID and width to a 2T bearing, but markedly bigger OD.
Part number is NTN SC05831CS37. Dimension is 25mm�68mmx12mm.
I got two sets, one for my 4T and one for a friend's 4T. Had to source them from SIP in Germany. Still need to pop the crank apart and find a decent big end bearing replacement option.
- az_slynch
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Camshaft uses a 6202 on the driven end and a 6002 on the far end. The needle bearing for the cam gear is an HK1412.Neurotic-Hapi-Snak wrote:That's good to know. I have a suspicion that the "bad cranks" that kill 4T engines, are actually bad bearings. Do you have a list of the other bearings? Like the camshaft bearings? Are the transmission bearings same as the 2T?
The trans bearings are spelled out in my transmission thread. The caged needle bearing for the intemediate shaft is an HK1616 and the roller bearing is a 6302. Bearings for the final shaft are the same as a PX Lusso.
At what point does a hobby become an addiction? I'm uncertain, but after the twelfth scooter, it sorta feels like the latter...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...
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- az_slynch
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- Joined: Wed Sep 12, 2012 4:56 pm
- Location: Tucson, AZ
Still working on this. The dimensions for the rod/bearing are close to a Honda CRF150. Waiting for parts to be sure. Will post when I have the answer.
At what point does a hobby become an addiction? I'm uncertain, but after the twelfth scooter, it sorta feels like the latter...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...
Seriously...I've lost count...
Seven mopeds ...that's still manageable...