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450 head on 305

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olebmw
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450 head on 305

Post by olebmw » Fri Nov 18, 2011 2:05 pm

Is there a site that goes into detail about what is involved in installing a 450 top end on a 305?

teazer
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Post by teazer » Sat Nov 26, 2011 5:01 pm

Pete Rhodes in the UK did that trick a few years ago. It's not complicated - a little welding and drilling to move all the studs and open up the crankcase mouths.

Pistons that size tend to come with larger pin and that means a different crank & Rods or at least a crank rebuild to take different rods and that's manageable with a full machine shop.

bill440cars
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Post by bill440cars » Sun Oct 23, 2016 1:43 pm

I remember seeing that one on her or somewhere online. Lot of work, but quite the build. Also saw once, where someone put a Suzuki Top End on a CB77 as well. I Think it was a GS400 top end? Now that I would like to look back into both of those, I don't know where to find them.
Working Toward Being Able To Work On MY Motorcycle Projects (Trying To Get Past "Other" Projects & I Think I Am Making Progress?

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G-Man
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Post by G-Man » Sun Nov 06, 2016 10:01 am

Ellis Moore did the GS400 Version

http://bringatrailer.com/2011/10/05/rep ... 7-replica/


Here is a CB450 top end on a CB77

https://www.youtube.com/watch?v=7_AxDxy5FGY

G
bill440cars wrote:I remember seeing that one on her or somewhere online. Lot of work, but quite the build. Also saw once, where someone put a Suzuki Top End on a CB77 as well. I Think it was a GS400 top end? Now that I would like to look back into both of those, I don't know where to find them.
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

rrekr
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Post by rrekr » Sun Nov 06, 2016 1:42 pm

I believe it was Ellis Holman.

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G-Man
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Post by G-Man » Sun Nov 06, 2016 1:53 pm

Yep - you're right. I was thinking about an English guy who makes gearsets.

http://www.mpe07.co.uk/mpeprevcoms.html

G

rrekr wrote:I believe it was Ellis Holman.
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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sixtiescycle
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Post by sixtiescycle » Mon Nov 07, 2016 12:41 am

rrekr wrote:I believe it was Ellis Holman.
Les Barker of Vancouver, WA did much of the machine work to adapt the the GS400 top end to the CB cases. I remember talking with him at the time of the modifications for Ellis.
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'61 CB92
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