| Listed in parts books | Not catalogued by year yet |
BEARING,T140 TIMING SIDE - METRIC NSK JAPAN/ POLAND - - Replaces NM17822, 6306, 70-3835, 49-00038
Metric NSK ball bearing (6306, 30x72x19) for the T140 crankshaft timing side, replacing NM17822, 70-3835, and 49-00038.
This is the timing side main bearing used on the T140 unit-construction twin, sold under the metric bearing size 6306 (30x72x19). It's a ball bearing made by NSK, sourced from either their Japan or Poland production, and it carries over the numbers that older parts books and earlier supplier runs used for the same physical bearing.
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If your parts book lists NM17822, 70-3835, or 49-00038 for the timing side main bearing, this is that same part under its current metric designation. The timing side main bearing supports the crankshaft on the timing side of the crankcase, where it has to deal with the load off the timing gears and cam drive.
We don't have extra fitment notes on file beyond what the catalog carries here, so if you're not sure this is the exact bearing your crankcase takes, give us a call before you order and we'll confirm it against what you're rebuilding.
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