2018 GP300 Crank Big Needle Bearing

[VintagePhill]

Hey Guys,
Does somebody know the Code and manufacturer of the lower main Crank needle bearing for a 2018 GP300?(See picture)I want to rebuild the crankshaft myself and don't need the crank and main shaft contained in the set.
Thank you guys!

 

[blitz11]

If you need to rebuild a crank, you'll need a new rod, bottom pin, thrust washers, and big end bearing as found in this kit.

Connecting Rod - Rieju/GasGas

Built from the strongest and most dependable alloys available today Includes crank pin, big-end bearing, small-end bearing, and thrust washers Fits: 2021-2024 Rieju MR 250-300 1997-2019 GasGas EC/XC 250-300

motocenteraz.com

Not sure why you'd rebuild a crank without a rod/pin change.

 

[VintagePhill]

If the rod and Pin are still in good shape I'd just change the bearing and be done so my thought. Are there any implications to this idea if no visible wear is present?

 

[coopernicus]

If I remember correctly, the rod used in the legacy GG/Rieju 250 and 300 are the same as mid 90s Honda CR 250 rods. You may be able to find a Honda part easier.

 

[VintagePhill]

Thanks for this Tip, for anybody searching, the crankshaft is a PROX 03.1315 and fits 200-250-300 2T from 1997 to 2020. Sadly the Dimensions of the lower big Needle Bearing are unique (maybe on purpose) and cant be bought elsewhere as far as i could tell. (Dimensions: https://gmoto.de/pleuel-satz-prox,163351.html)

 

[MxPhlipper]

I will NEVER rebuild a lower end w/o replacing everything I can! I had a 1982 Maico 490. Had a bearing failure (don't recall which.) Around 1994 if I recall.

There was 1 bearing I couldn't get for another 2 weeks. Said F' it, put it together. Ran great for 1.5 hours and that exact bearing failed. Redid the whole thing again.

Moral, don't get that deep and get rushed and don't replace associated parts. It ain't worth it!