Honda-SOHC

Luckily no floods in this part of the UK (North West) so far ! But the rain has been terrible, and every time we have heavy rain my garage floods, only a couple of inches but once it is in it's difficult to shift as the garage floor slopes down at the bench end which is the same level as the garden behind it. Got really fed up with this so this week I installed a rain water channel that I bought from eBay, hopefully it will work !

Cheers

Den

Hi biffta, long time no hear, yes SAMCR750 put me in touch with Bill in Warrington, he was also recommended by the guys at Elite Engineering, so hopefully they will come back all shiny.

Cheers

Den

Well,
      The wheels are off being rebuilt, the braided hoses for the front brake are being made up. so I though I ought to look at the side covers. The original LH side cover is cracked, the RH cover is in good shape. To cover all bets I bought a pattern LH cover, this has been drilled (for the emblem) and both it and the RH cover have been primed.
I have fibre glassed inside the original LH cover to strengthen it, the next job will be to fill and smooth the external crack, no problem there as I am used to making seams disapear on my model kits, but I nearly forgot to drill a hole at the end of the crack.
The spare LH cover that I got on eBay is not in too bad condition except for a badly cracked maroon paint finish (or so I though !), so starting with 280 grit wet and dry I started to sand it, 3 hours latter and down to 80 grit I have discovered the original Honda Phantom black, a grey primer, a blue coat, a white coat, a red coat, and the previously mention maroon coat ! Will start again tomorrow !
While I had the original paint exposed I matched it at Halfords, Ford Graphite grey is very close, will see what it turns out like.


Cheers

Den

Hi Jack,
           I still do not know the set up of your bike but I would not become fixated on one thing if I was you, main jets do not really wear out, they do get dirty though. I would approach the problem logically, if the bike runs fine at low and medium speeds it could be a couple of things:
Retarded timing, not enough fuel flow, not enough air flow, spring to mind.
Ignition timing, check points gap, check timing, check advance and retard unit works correctly.
Carbs, check air filter, check fuel flow, from the tank to the carbs, check the fuel tap, fuel lines, breather on the tank, float valves, note that on the F1 these have filters, float height, check all jets are clean. Check jet sizes are correct and the needle is in the middle position.
Check valve clearances.
Check cam chain tension.
Check plugs and leads/caps, the CB750 HT leads tended to short out where they come out of the coils in wet weather.

Cheers

Den

You may have problems removing the motor with the carbs attached, the other alternative would be to either try a hair drier or cut the rubbers if you are going to renew then anyway.

Cheers

Den

Hi Andrew,
              Steve is correct, when the carb rubbers are new all it takes is to push down and back on the carbs and they will fall off. But with old stiff rubbers it gets to be more difficult. Presumably you have completely removed the airbox and slackened (or removed) the hose clips on the rubbers nearest the cylinder head ? This is for a CB750, not sure about others.
I have just replaced the carb rubbers on my 76 CB750F1 and the difference is amazing.

Cheers

Den

Hi Jack,
          If you haven't got around to the map yet I live on the Wirral, unfortunately as I am very slow and carefull these days (and skint) it looks like my rebuild will miss the summer this year.

Cheers

Den