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Author Topic: "La Pastinaca" CB450 498cc Big Bore Engine Built By DWMS Racing!  (Read 59628 times)

Offline joeyputt

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Re: "La Pastinaca" CB450
« Reply #10 on: Jul 15, 2011, 16:33:25 »
Right on Joe! This will be a jewel for sure.

Brother it is definately going to be pretty but a lot of the jewels will be on the inside! Yesterday I received two big boxes of parts that Brother Habanero52 sent and was like a child at christmas going through them all! Hahahaha! You would think after all of these years I would be tired of looking at shiny new parts but for me it never gets old!
« Last Edit: Jul 15, 2011, 16:41:24 by joeyputt »
Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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Offline teazer

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Re: "La Pastinaca" CB450
« Reply #11 on: Jul 15, 2011, 16:44:31 »
New gears are always a nice thing and if the lash is in spec and tooth engagement is deep enough you should be good to go. We do something similar on GT570 using GS gears and it's an old trick on Honda 305s to use a Dream top gear with one less tooth.

Is that a closer top gear or higher first gear? According to NOVA it's bottom gear that uses 30T ( different again). 

Do you have all the tooth pairs and I can compare them to what NOVA has. It is possible that different years used different gear ratios or maybe General Export Vs UK or something.


Offline joeyputt

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Re: "La Pastinaca" CB450
« Reply #12 on: Jul 15, 2011, 17:01:51 »
Brother it is a K5 engine and 5th gear on the main shaft. I am removing the crankshaft and transmission now, I have a computer next to my work table, for final inspection and cleaning and can post all of the gear counts for you.
Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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Offline teazer

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Re: "La Pastinaca" CB450
« Reply #13 on: Jul 15, 2011, 17:25:10 »
Joe,
That's really interesting.  I went on line and trolled through parts list and found most of the gears and 32T is listed as top gear mainshaft as you said. All the gear pairs I could match were around 58/59 teeth but NOVA lists them as 45/46/48 which is very different.  CB350 and 360 and race kit trans are in the 55-58 tooth range. I wonder what NOVA used as their starting point? In fact the gears that NOVA list re very close ratio.  I wonder if that was a race kit trans they were measuring.  I have no data on those.   

If you get a chance to count teeth sometime, I'd appreciate it. From the parts list it looks like 41- (18), 22-(37), 26-33, 29-29,32-27.  The numbers in brackets were guesses based on tooth counts in the other pairs. They are probably fixed.

 

Offline joeyputt

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Re: "La Pastinaca" CB450
« Reply #14 on: Jul 15, 2011, 18:10:34 »
Sure that is no problem at all Brother, I just got the crankshaft and transmission out and am working on cleaning the cases and I am going to record the transmission numbers for Brother Habanero52's build sheet so I can post them here for you as well this afternoon.
Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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Offline joeyputt

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Re: "La Pastinaca" CB450
« Reply #15 on: Jul 16, 2011, 02:31:46 »
Here is a photo of the top case half after I removed the crankshaft, main shaft, countershaft, gears, etc. and started cleaning it.



Here are the transmission numbers -
17-41, 22-36, 26-33, 29-29, 32-27 (31-27 for this engine with the close ratio gear)

So the ratios would be -
1st - 2.41:1
2nd - 1.64:1
3rd - 1.27:1
4th - 1.00:1
5th - 0.844:1
(5th in this engine with the close ratio gear will be 0.871:1)

Brother Teazer I have found the same information with the NOVA standard values being 16-30, 19-27, 21-24, 23-23, 25-23 which as you said run anywhere from 45-48 paired compared to the stock gearing of 58-59 paired. I also wonder if NOVA's standard value measurements are from their old race kit trans which I also do not have the specs for, I know that they are no longer offering the five speed but do have a six speed available. The last time I looked Team Hansen had the last available NOVA 5 speeds but they do not list the ratios for it.
Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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Offline joeyputt

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Re: "La Pastinaca" CB450 Parts List And Photos Added!
« Reply #16 on: Jul 17, 2011, 13:13:47 »
I know a lot of you are interested to know what all is going into Brother Habanero52's engine so here is the parts list and a few photos! I will show each part in more detailed photos as I install them but this will give you all a better idea of what we will be doing.

Parts list -
Complete Athena gasket set
Solid copper head gasket
Mikuni VM32 carburetors
Kibblewhite black diamond intake valves
Kibblewhite black diamond exhaust valves
Kibblewhite bronze intake guides
Kibblewhite bronze exhaust guides
Kibblewhite H.T. steel lash caps
Kibblewhite racing valve spring conversion kit with titanium retainers
The camshafts and rockers have been shipped to Megacycle for regrinding
Tsubaki cam chain
THR 74mm racing pistons
Barnett clutch friction plates and new springs
Electronic ignition
Close ratio 5th gear
New starter chain
Rebuilt starter
Rebuilt stator
Stainless steel engine bolt set
Chrome valve cover bolt set
16 tooth front sprocket
New left cylinder head cover/cam bearing
New right cylinder head cover/cam bearing
New base point cover/cam bearing
New tach gear cover/cam bearing
New rear cam chain guide
New roller cam chain guide
New front roller cam chain guide
New cam chain tensioner
Jet kit

For the cosmetic finish Brother Habanero has decided on a satin black for the engine cases, cylinders, cylinder head, and stator nose cover with polished aluminum clutch, stator, sprocket, oil filter, and all of the cam covers. We will also be polishing the cylinder heads fin edges and the Honda lettering on the stator nose cover as well!

Here is a photo of the new Mikuni VM32 carburetors and K&N air filters!


This photo shows the beautiful THR 74mm racing pistons!


There are still a few parts on the way but here is a photo of what has arrived already!

Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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Offline VonYinzer

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Re: "La Pastinaca" CB450 Parts List And Photos Added!
« Reply #17 on: Jul 17, 2011, 20:40:08 »
Puuuurrrdy!
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline Swagger

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Re: "La Pastinaca" CB450 Parts List And Photos Added!
« Reply #18 on: Jul 17, 2011, 21:45:55 »
That's a giant pile of the good stuff....
.....there's no way that little rice cooker is going 100m/h when the work need to get up to those speeds includes a big fuck off fairing shaped like a giant cock. ~Staffy

Weiner tetanus is nothing to scoff at. ~JustinLonghorn

Offline joeyputt

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Re: "La Pastinaca" CB450 Parts List And Photos Added!
« Reply #19 on: Jul 17, 2011, 23:48:42 »
Puuuurrrdy!

That's a giant pile of the good stuff....

Brother Habanero52 definately supplied a lot of beautiful parts to work with!
Joe - Owner/Operator of DWMS Racing World Class Engine & Motorcycle Building www.dwmsracing.com

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