RCU Forums - View Single Post - 3W Engine Rebuilding

07-03-2002 | 03:15 AM

#2

cu. in.

Senior Member

Joined: Apr 2002

Posts: 289

Likes: 0

Received 0 Likes on 0 Posts

From: Birchwood, MN

3W Engine Rebuilding

Hi Diablo,

Since nobody else posted, I would suggest contacting RCign because he has the equipment to straighten crankshafts. He may have some experience with these split twin cranks.

I have a 3W 50i engine (half of your 100) apart and noticed that even this single cyl. engine has a pressed-together crank that traps the needle bearing. I would have the same problem with my single cyl. if the lower needle bearing went bad.

The 50i lower needle bearing measures 12mm dia. (.472) by 10mm (.394) length. Seems smallish compared with .433 crank pin dia. on a 35 cc OS BGX or .513 dia crank pin on a ST 4500. The latter two engines have bronze bushed rods, tho.

This is starting to sound like the Red Line Oil thread of June 3.

http://www.rcuniverse.com/showthread...806&forumid=37

Brucee

Reply Like