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Messages - Andrewd2667

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CB350/400 / Recommendations on Engineers for Re-bore/ Head skimming/ Valve seats/ Cleaning

« on: January 23, 2017, 11:21:48 AM »

I would greatly appreciate if anyone can advise/recommend on engineering services in (Hertfordshire would be ideal) to do the following on the CB400

1. Re-bore and honing -
2. Head skimming
3. Valve seats / valves lapping
4. Cleaning - Vapour blasting

The picture is of the guilty piston - it must of had a hard life.

CB350/400 / Blown piston - best way forward

« on: January 22, 2017, 11:09:18 PM »

The no 3 piston has blown with what looks like piston ring split and damage, along with excessive carbon.

How much damage to barrel - before you have to re-bore?

looking at all the pistons is it a case of replacement for all?

CB350/400 / CB400F Rust on collector - Repair ?

« on: December 08, 2016, 01:45:09 PM »

Please can you advise if I can get the two rusted areas on the collector repaired - it is on both sides - the downpipes are in good condition. [ Guests cannot view attachments ]

CB350/400 / Oil Filter Bolt Removal - That worked

« on: December 05, 2016, 03:20:35 PM »

I know that there have many discussion son this topic, but wanted to contribute my experience on this one that works.

Basically on my bike 1976 CB400/4 the oil filter bolt was rock solid and I did try everything to remove which included Plus Gas, WD40, GT85, brute force, breaker bar, spanner, socket and extension, vice grips, hammer, propane blow torch etc - nothing it would not budge a mm.

My neighbour suggested using heat combined with Coca cola on the bolt especially around the flange area - the reason being is aluminium oxide is formed which is holding the bolt.

I used the blowtorch several times ( three) to heat the bolt and applied the coke with a turkey baster then just left it for two days, went into the garage today and the bolt moved quite easily - I thought I had won the lottery.

I was close to using a hacksaw to get the oil filter off but this worked and stopped any damage to the oil filter housing - hope this helps anyone else going through the same pain.

New Member Introductions / New 400/4 owner in Hitchin

« on: December 05, 2016, 02:57:54 PM »

Hello everyone,

My name is Andrew I live in Hitchin in Herts, I took the plunge and managed to buy a 1976 CB400/4 in November having been looking for a while, it has been semi restored and was running. In the process of dismantling with the objective of getting it back to it's former glory, this will be my first restoration project and realised that I will need all the help I can get.

Looking forward to the challenge.