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BHPian SnS_12 recently shared this with other enthusiasts:
Last hurrah:
With just a day left to draw the curtains on 2024, we are now closer than ever on firing up the RZ. Since, my friend Tony was rebuilding the crank himself we didn’t rush through the process and fitted back everything together only when we were 100% sure. Now, the bottom part of the engine is done and only the blocks and pistons will need some shaper work before they are fitted on. So, now the engine has all new oil seals and bearings and good we opened the engine as there was dirt particles which could only be accessed after opening the engine. The clutch plates were replaced as well along with the new springs I had sourced from Yambits. The pressure plates unfortunately are not of the correct size for some reason so were not fitted on, but the ones on the bike are in good shape so we are good on that. Also, the new clutch worm kit would go on too before the magnet cover is fitted on.
This build has turned out to be a mammoth one and I prefer posting regular updates than writing down the whole build thread post completion as it would mean I could possibly end up missing out on a lot of small details/updates with the timelines involved and the amount of photos one would have to sort out at the end of it. There aren’t many early Yamaha RZ 350 in India and certainly none as comprehensively rebuilt and documented like BLA (thinking of calling it by its registration identity) so updating has been an absolute pleasure
Now, for some pictures…
New bearings and Long branded connecting rods
Four crank bearings in total. Two on each side of labyrinth seal and one each end of the crank webs
The internals are now nice and clean
Installed after proper truing and now ready for action
Top portion of the crankcase along with the block and head
From left the kick gear and shaft, clutch bell and primary gear
Top view
Bottom portion of the casing..
Crank opening coveted up to prevent dust from entering
Clutch cover with the water pump
New clutch springs bolted down
New clutch plates
New water pump pipe
Up close
Top view with the O ring
New studs. 20 in total
All set to unleash hell at 10k+ rpm
Check out BHPian comments for more insights and information.