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Messages - ColCB400 4
1
« on: March 26, 2016, 05:56:49 PM »
So, I finally decided to trip up a 400 four engine. they are selling 460cc pistons online for about £150, cant afford yoshimura  Bought some spare barrels with 0.5 oversized pistons. When it arrived the pistons wont slip in the barrels??? I pondered and saw the pistons have the following markings: POP Y CB450F on the top it has 0.5 and a E for the exhaust valve. The recesses for the valves are bigger than standard and the top looks "fuller" These are the Yoshimura ones right? has anyone seen these... in the flesh as it were? I understand Yoshimura did 54mm and 54.5mm bore and presume the ones I have are 54.5mm because of the 0.5mm? Can anyone confirm this? They measure about 54mm but its hard to tell with a ruler. I have 4 pistons with intact ring sets.... can I just get a rebore and chuck em in ... using a different head gasket will I need different size con rods with different sized little ends?
2
« on: March 19, 2016, 04:45:44 PM »
It would seem logical to just add a little more oil to each leg, maybe an egg cup full and see how it feels, keep adding till it feels ok. At least this way you can leave the drain bolt alone.
If you put half a pint in and it still feels pants then go for a higher grade oil and see how that goes but maybe you should be ready to deal with the drain bolt. You should be able to take the bottom of the leg easy enough... swarf cant be good but probably wouldn't matter... but inevitably would lead to doubt.
Don't you knock the little tang off when helicoiling, don't want that sloshing about?
Just add some more oil, it will stiffen up.
3
« on: March 15, 2016, 08:24:39 PM »
Hi Jon,
these forums are full of stuff, Enjoy your build!
4
« on: March 13, 2016, 08:30:14 PM »
@Brituro, The exhaust is fine, no jetting problems, power issues and looks the part but dosnt have that slightly deeper sound I got from my old Honda silencer. I have been out on the road today, with my open helmet on (I get to hear better) and it wasn't sounding that bad to be honest but I just recall a deeper note. Wish I didn't get rid of my old one to the scrap bloke
5
« on: March 08, 2016, 08:13:04 PM »
I measured another collector box I have and its 42mm od, and they do a dunstall which could fit but they seem to sell in pairs... might ring them.
Thank you Paul Gledhill for confirming my suspicions, I am glad its not just me. I don't want loud just a deeper sound, I know the bike can do it. My last silencer just had to go and the replacement is not cheering me up like it should.
@ Mike the bike, I do agree to some extent, your motad was just killing the thing, it must have felt like it was pulling a car.
I have read somewhere some chap took out the muffling and replaced it with some good stuff but these silencers are sealed.
Think I will be ringing ClassicBikeShop tomorrow... thanks guys.
6
« on: March 07, 2016, 07:43:24 PM »
I bought a silencer for my 400/4 from ds last year and it sounds lame.
Anyone know of a supplier offering a better sounding silencer.
don't want to re-jet or tinker at all just unbolt the old one and fit the new.
Prefer similar styling to standard but happy to look at anything that sounds more the part.
I have a standard set of Honda downpipes.
7
« on: September 30, 2015, 08:04:39 PM »
Paul Jackson, Outlane, Huddersfield, best wheel builder by far but a bit out of the way to find.
8
« on: July 16, 2015, 08:26:04 PM »
yeh, n sounds like the right thing to do.
Polish brake arm and alloy bracket, send to phil, pivot pin sent back perfect... probably all done for £70.
Paint brake arm if you wish but perfect job...
10
« on: May 21, 2015, 09:36:33 PM »
I have had this problem recently with my 400 four.
Searched for days for 4No main bearing yellow shells, read some stuff and some folks seemed to think the tolerances were so fine it didn't matter. An engineer supplier I use told me it wont matter, he was totally sure and has worked on engine set ups for years.
I resigned myself to using a shell size down making the journal effectively loose, bought the shells.
Eventually found a supplier in the states with the shells I needed, bought and fitted them.
I confess I have never seen black or blue for sale but maybe brown.
I have 4 green ones if ya want em part number 13317-333-003.
btw nice project
11
« on: April 12, 2015, 09:58:21 AM »
Thanks for reply Oddjob
I managed to source some from Texas, hope they will be delivered in maybe three weeks, I knew it was the right thing to do.
12
« on: April 09, 2015, 07:47:17 PM »
I needed to replace my crank, one of the journals was shot with a groove for the oil way. very poor.
I bought a crank off ebay and has no wear or none that I can see even the typical banding where the oil way goes is just noticeable. I have the bearings from the crank and they are only showing very slight wear so all in all I was lucky and its all tip top. the bearings are all jumbled up and I don't have the codes for the cases the crank came from.
My Crank case codes are BBBAA (the cases I am going to use)
Crank numbers are 11111
manual states Green for the BBB
and Yellow for the AA
I cant get any yellow shells
Question, does anyone know where I can get some yellow shells from
Question, will it matter if I put green in throughout, I assume 2 of the bearings will be tight but will it matter.
I was very reliably informed that it shouldn't matter if I run it in carefully but logic suggests that I am doing something fundamentally wrong, but I am running out of options.
I have spoken to crank grinders to remove 0.01mm off the two journals but they don't want to touch it.
It seems insane to try to ream out the cases so I have BBBBB across the whole series of bearings
Any advice
13
« on: December 25, 2014, 09:36:41 AM »
Very Nice!! Hope mine come sometime in the new year 
14
« on: December 11, 2014, 07:06:43 PM »
Got my frame back from the powder coaters and started building... like you do.
I noticed two holes have appeared just behind the swinging arm bolt, on the nearside both inside and out.
They are too neat to be corrosion... 5mm dia.
I think they are drain holes brazed up prior to painting during production.
I can use blanking grommits to seal them up, the location isn't structural so it shouldn't be a problem.
anybody else got annoying holes?
did the powder coater get too carried away when blasting?
15
« on: November 29, 2014, 12:50:18 AM »
Thanks guys, got em sent to Chromfix today using the courier service they offer and yes, it looks like a silencer from silvers will be on order soon.
4 weeks £250 ouch
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