Topic: 1975 CB550K gift, Cafe build

[rollypoli]

Shell bearings in some sizes are getting very difficult to find and are very expensive so unless badly worn or marked leave well alone BUT they must go back in the same place they come out of.
Primary chains and damper rubbers wear quickly, most gearbox bearings are very overspecked and last a long time, some are not easy to get

Sounds good. I’ll leave them be then.

[calj737]

this thread should be in the project shop, no?

i got my 550 head done by mike, also with oversize intake valves, porting, milling, all his good stuff... he recommended i use the wiseco pistons with it, apparently they're more precisely manufactured.

Thanks for the info.  I believe the wiseco 10:1 only would work with stock valves.
With the intake. I would do something like your setup if I had the stock box. But I don’t and people seem to want a lot for them. So I just decided to stick with these. Or design a breadbox style filter.

Not correct. Flatlander uses +1mm oversized intakes with a 126-00 cam with no interference issues. I don’t know his squish dimension, mine is 0.032 and a much more aggressive cam, hence the pockets milled. Either way, JE or Wiseco are both very good pistons.

[rollypoli]

this thread should be in the project shop, no?

i got my 550 head done by mike, also with oversize intake valves, porting, milling, all his good stuff... he recommended i use the wiseco pistons with it, apparently they're more precisely manufactured.

Thanks for the info.  I believe the wiseco 10:1 only would work with stock valves.
With the intake. I would do something like your setup if I had the stock box. But I don’t and people seem to want a lot for them. So I just decided to stick with these. Or design a breadbox style filter.

Not correct. Flatlander uses +1mm oversized intakes with a 126-00 cam with no interference issues. I don’t know his squish dimension, mine is 0.032 and a much more aggressive cam, hence the pockets milled. Either way, JE or Wiseco are both very good pistons.

No interference on wiseco 10:1 59mm pistons? I’m just going off what I have been told.

[calj737]

It’s all about the cam specs…

[flatlander]

Not correct. Flatlander uses +1mm oversized intakes with a 126-00 cam with no interference issues. I don’t know his squish dimension, mine is 0.032 and a much more aggressive cam, hence the pockets milled. Either way, JE or Wiseco are both very good pistons.

No interference on wiseco 10:1 59mm pistons? I’m just going off what I have been told.

right, i use the wiseco 59mm pistons with +1mm intake valves. this works with the 126-00 and 358a cams, without having to modify the pistons. i have about .040 squish, so more space than cal with a lower lift cam (dammit should i take it lower???).
if mike knows the piston/cam/valve size combo he'll be able to make sure that your squish works out as well.

[rollypoli]

Thanks for all of the information on the wiseco pistons and intake advice so far

Back to the update I was gonna put in that old thread
Well. I haven’t updated this thread is a long time.
After tearing the bike down. I needed a new head and chain and sprocket. Not too bad. The crank and rod bearings seemed in spec still but they were definitely well worn. Once the whole thing was in pieces I realized that the previous owner not only didn’t touch the engine he did not replace a single item on the bike. Stock wheel spokes, stock bearings, stock seals, bushings, stock drum brake, the only thing done was a tapered steering bearing which is nice.
 Anyway. After all that and getting studs, Cush drive rubber, primary chain, all new crank and rod bearings, and oil seals. I decided that I don’t have time and don’t want to spend more on doing the power upgrades this winter. I want to ride the bike especially now that it will be in much better condition. So the head will wait till fall to send to Mike. This also gives me time to find someone in Minnesota/Wisconsin to do the boring and such for the Wisecos.

Here’s some photos of things I’m currently working on.
1. Got the oem wheel bearings out and replaced
2. Case is starting to go back together. Just have to plastigauge the crank journal bearings.
3. All covers were blasted and hit with some engine clear to keep that look. The block,jugs and head will be black.
4. Dual disc conversion is going great. Got a second disc and caliper for $35. Then I found someone parting out their cb650 with a cbr600r brake master cylinder with braided lines. Got that for $50. Should be a great upgrade when it’s all put together.
5. Not shown yet but I stripped the paint on the swingarm and have bushings coming to replace the stock ones. The pivot axle seems a bit too loose to me. And I am 50% of the way done with my wiring harness. Stitching to all Deutsch DT/DTM connectors. I’m an electrical engineering student so I’ve been working on a board built into the stock tech housing that does speed, switching, replaces the ssm. And some other fun things.