CB360 oil system modification

[crazypj]

oil mods for 360
Inside clutch cover

Generalisation of how oil flows via crank mounted centrifugal filter

The bit you need to remove, getting spring clip off is difficult

Use Dremel and 3/16" grinding points, no need to go all the way to edge, the spring is a close fit inside

This should allow longer high RPM operation.
I believe the transfer piece restricts flow enough that it will move under pressure dumping oil back to sump and causing cam bearing failure.
Using thick (20W/50) oil causes this to happen even sooner

 

[4 stroker]

Great idea, this can solve the problem indeed but what about the middle cam bearing?

grtz

 

[crazypj]

They rely on flow rather than pressure.
If you increase flow, there shouldn't be a problem
Using 5W/40 full synthetic motorcycle oil seems to 'cure' the cam bearing problem as well, except you may get some clutch slip without heavy duty springs fitted

 

[mydlyfkryzis]

The oil also removes heat internally. Better flow = better heat removal.

 

[Bert Jan]

Another mod (external oil line and needle bearing on cam) is on page 2 of my gf's cb200 thread;

http://www.dotheton.com/forum/index.php?topic=32298.0

 

[crazypj]

I Bert,
I have an external oil line mod for 360's but it's a lot more work.
I saw you had to drill a bleed hole on the 200
I have 'gun drilled' cam with outlets on base of lobes and on every journal. (pictures of cam somewhere in the 360's build/blog)
I'm already planning a MKII version with oil feeding into end of cam differently

 

[rockcitycafe]

Another mod (external oil line and needle bearing on cam) is on page 2 of my gf's cb200 thread;

http://www.dotheton.com/forum/index.php?topic=32298.0

not sure on the 200 head, but the 360 head is really hard to convert to needle bearings, you basically need a full machine shop, where the 350 type heads you really only need a basic lathe

 

[frogman]

I can dig all the pictures I have of when I drilled the center bearing for oil passages for my 360 head and post them if anyone wants them. I know had them posted somewhere on here but no issue not to repeat.

I will be back into that engine I think here in a month or so just to see what it did if anything.

 

[crazypj]

I remember seeing someones pics, thought it was roc?
Wouldn't harm to have them put here anyway

 

[rockcitycafe]

the drilling for the center bearing is really easy, honda cast a passage into the head for it in the first place, but never drilled it... we're all convinced the cb360 was honda's cornercutting budget "upgrade" to the really well selling cb350. you could probably do the center bearing drilling in a drill press carefully, just come in through the points side with a 5mm drill, set the depth to just a bit past the center bearing, then drill a 2-3mm intersecting hole through from the center bearing into the 5mm hole, tap the 5mm hole and install a set screw with thread locker. the oil line from the left stud will intersect your 5mm hole because that's how they designed it in the first place. not sure what it will do to oil supply for the left bearing, but that didn't interest me as I had needle bearings anyway

 

[crazypj]

The problem is just getting oil to the top end at high rpm, the transfer piece pushes back and dumps oil back to crankcase.
Doesn't matter how many holes you drill if the oil isn't getting anywhere near them

 

[Untame]

What happened to the pics in the OP?

 

[adventurco]

A lot of the pics were lost when the website transferred to the new format I believe. I still have my pics somewhere of when I modded mine but I will have to dig them up


Sent from my iPhone using DO THE TON

 

[crazypj]

Photobucket also deleted my account as I wasn't going to pay them for a few megabytes of pictures (even $5.00 a month soon mounts up)
I have some of the original pictures, will search them out and see about re-uploading

 

[Untame]

Photobucket also deleted my account as I wasn't going to pay them for a few megabytes of pictures (even $5.00 a month soon mounts up)
I have some of the original pictures, will search them out and see about re-uploading

Thank you!