450 head on 305

olebmw · 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 · 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 · 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.

G-Man · 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.

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

I believe it was Ellis Holman.

G-Man · 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.

sixtiescycle · 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.