cb915 (you poor stupid crazy son of a bitch engine build)
- Thread starter rockcitycafe
- Start date
crazypj
Split personality, I fake being smart
Re: cb915
Did you run out of quill travel?
I would machine sleeves to CB750 size or match to block
Make sure to use a replaceable carbide tip as it will have smoother radius (don't want a sharp edge)
You will probably need to make a plug to fit into top of liner and an oversize bull nose to fit in the bottom, liner machining is easy but they are fragile and easy to crack if not supported
As for rods, lighten pistons
Did you run out of quill travel?
I would machine sleeves to CB750 size or match to block
Make sure to use a replaceable carbide tip as it will have smoother radius (don't want a sharp edge)
You will probably need to make a plug to fit into top of liner and an oversize bull nose to fit in the bottom, liner machining is easy but they are fragile and easy to crack if not supported
As for rods, lighten pistons
rockcitycafe
I make things.
cb915
Didn't run out of travel, the heel is what's left of the heel machined in the cb750 block, I can bore it wider, or cut the sleeves heel down, but I worry making the sleeve heel narrower will weaken the seal at the head by letting the sleeves slip down
Didn't run out of travel, the heel is what's left of the heel machined in the cb750 block, I can bore it wider, or cut the sleeves heel down, but I worry making the sleeve heel narrower will weaken the seal at the head by letting the sleeves slip down
rockcitycafe
I make things.
cb915
Meant flange, learned most of my machining from die maker, is a heel only on square stuff?
Meant flange, learned most of my machining from die maker, is a heel only on square stuff?
crazypj
Split personality, I fake being smart
Re: cb915
Generally, particularly on keys to locate parts or when using shaper's
If your talking about the counter bore at top of block for flange, open it up until it breaks through between cylinders, machine flange down and put a flat on it so pairs don't butt against each other, needs about 0.020" between liners
CB400F does the same thing as bore spacing is narrow
Generally, particularly on keys to locate parts or when using shaper's
If your talking about the counter bore at top of block for flange, open it up until it breaks through between cylinders, machine flange down and put a flat on it so pairs don't butt against each other, needs about 0.020" between liners
CB400F does the same thing as bore spacing is narrow
rockcitycafe
I make things.
Re: cb915
cool, we'll see how I do... going to have to figure out what to do about those 6mm screw holes on the outside of 1 and 4
cool, we'll see how I do... going to have to figure out what to do about those 6mm screw holes on the outside of 1 and 4
rockcitycafe
I make things.
cb915
machined the flange, machined the liner flats on, dropped them in, flycut the top, going to drop an end mill through the 6mm holes and retap as 8mm, that way they'll have partial engagement instead of none where the flange of the liner sits... then need to machine around the dowels, looks like those are just oil returns, so no need for super precision, just clearance, then need to mildly machine the oil feeds, then I'll need some bigger pistons
... good thing kawasaki provided me some
machined the flange, machined the liner flats on, dropped them in, flycut the top, going to drop an end mill through the 6mm holes and retap as 8mm, that way they'll have partial engagement instead of none where the flange of the liner sits... then need to machine around the dowels, looks like those are just oil returns, so no need for super precision, just clearance, then need to mildly machine the oil feeds, then I'll need some bigger pistons
... good thing kawasaki provided me someAttachments
rockcitycafe
I make things.
crazypj said:Works for me ;D
Guess you'll be doing some extra's now you know how easy it is?
How big are you going? 360 liners won't like more than 69.5mm
HA! fuck no, this has gotta be the MOST backasswards way of doing something, but since I'm not billing myself for my weekend time, and the parts were all junk (minus the rings) it's worth it to me, to say I did it all in my shop with tools that were really never meant to do what I made them do... kinda burt munro style...
rockcitycafe
I make things.
yup... I also realized I could have used cb350 liners, which would have eliminated breakthrough issues, but by using 360's I accidentally built a block I can bore to 70
rockcitycafe
I make things.
rockcitycafe
I make things.
this is actually coming together pretty quick, I already have the cam, and am just cleaning and bead blasting the bottom case stuff, I'm going to have to start thinking about what I want the bike to look like soon
rockcitycafe
I make things.
