1974 CB360 Fallin' Ditch Hell Ride

No big deal getting a copper gasket from Lani. Cheap enough to make sure it's right.
 
In the meantime, stator cover is finished: etched and painted...

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Haha. The U is for Utilitarian Art & Machine.

378 is for the displacement, for sure.

I lost my circles inside of the 8, so it's far from perfect. LOL
 
With the best I could figure measuring up, I ordered .042" base and head gaskets from Lani. The next size up is .050".
 
Just noticed your question about 71mm piston. Can't be done without a load of work.
Almost sure you use CB450 or 500T pistons as three valve 400 pistons are too short and flat top so compression is around 6:1 You will need new liners as they can't be bored far enough. Get a used Suzuki GS1000 block as it uses 70mm pistons (It's been a long time since I did the measuring)
 
You can contact Lani direct at
http://www.coppergaskets.us/. I think it saves a couple of bucks?
 
crazypj said:
You can contact Lani direct at
http://www.coppergaskets.us/. I think it saves a couple of bucks?
This is true. It's actually what I did. I just noticed that listing this morning. I had no idea he was listing them on eBay now.
 
I didn't know either. I guess it's a lot easier for people to find stuff they didn't know existed if they just put 'gasket' into ebay search?
 
maybe there has been a recent influx of ppl doing these 378 mods again? IDK, it just seems like there are a lot of them on here at the moment, and maybe lani has been getting enough interest that he figured he would put them up on ebay?
 
When I ordered mine from Lani I first contacted him through eBay and then ended up ordering directly from him. He wanted to talk w/ me, insisted actually, and then after we had everything worked out and agreed to, he asked that I send him an email stating everything we had agreed to. No problem, I figure it's better to make sure everything was correct the first time. I recommend you stress the 69.5mm bore, though, because even after we discussed that and it was in the confirmation email I sent, Levi and I found the bore of the gasket I got had to be filed a little to insure a good fit w/ no piston interference. All of my dealings w/ him were easy and professional and he was friendly and polite. The gasket arrived very quickly.
 
Lani hasn't changed, he really likes talking with customers.
I know for a fact he did a 'run' of CB360 to 378cc head gasketts about 6~7 yrs ago, I think it was 8 or 10 at one time? (I bought 2 as it's 'cheaper' and more accurate than cutting them from copper sheet (sheet was $17.00 then several hours cutting, drilling, filing)
May not sound like much but for a bike that's been out of production almost 40 yrs and was never very popular............................
Pretty sure he's done a lot more since then.
I forgot I sold some cylinder blocks bored for 69mm (with GS850 pistons) about 7+yrs ago, No idea where they are now though or even if they got built into complete bikes?
I never thought there would be more than 3~4 'in the wild' plus what I built for myself but pretty sure there are at least a few dozen by now? ;D
 
crazypj said:
I never thought there would be more than 3~4 'in the wild' plus what I built for myself but pretty sure there are at least a few dozen by now? ;D

One build here!


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With .042" copper base gasket

Squish is .040"
Basically, the thickness of the head gasket .


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