SOHC.co.uk Forums > CB350/400
CB400F Frustrations - Not firing, low compression (Cyl Block now off)
Bryanj:
From what i can see that is a set of exhaust valves not just one, replacing just one piston along with 4 sets of rings is a mimimum but a full set is better and as oversize cost the same as standard why not rebore if you can see marks, just my opinion its your money to spend how you wish
hairygit:
Or go mad and get a 460cc bigbore kit from cruizinimage, a fairly good quality kit, and a lot cheaper than genuine parts!
ManicGTI:
Yeah I pulled all four exhaust valves to take a look at them and give the ports a clean. Aside from being filthy it looked in fine condition. I'm hoping my car valve compressors are the right size to get them back in again!
Don't get me wrong, I'm happy to do what work is required. But I don't subscribe to blindly changing everything. I'd prefer to get a view on the condition of what's there, if its scrap then so be it.
Having said that...I had spotted the cruizinimage kit on prev threads, could be a good solution. Any downsides aside from losing the taper to get the rings in?
Sent from my Nexus 5 using Tapatalk
hairygit:
Any good machine shop will do the boring and reinstate the tapers.
ManicGTI:
Ah ok, I had thought from various threads (http://forums.sohc4.net/index.php/topic,96453.25.html) that the overbore meant there's not enough meat in the liners to have a taper with the 466cc kits.
BikePusher has an engine for sale at the moment as well...could be an option.
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