Honda-SOHC

This is the clutch cover after stripping with Nitromores before painting I used 1500 grit to remove virtually all of the dark oxidation patches it took me less than an hour..

Cutch Cover by Macabe Thiele, on Flickr

This is after the painting & baking in the kitchen oven - no sheep were harmed in the painting or photography process.

 Painted Cover by Macabe Thiele, on Flickr

Thanks for all the replies and physics theories, interesting reading

All sorted now by rebalancing carbs and resetting idle screws

Ticking over lovely again 👍👍👍

I'm curious as to what you did in what order. I understand adjusting the idle air screw but what did the rebalancing consist of - was it adjusting an individual slider height?

I'm pretty new here myself - welcome it's a great bunch of folk here - very helpful.

Quote from: Macabethiele on October 21, 2020, 04:34:42 PM

If you get these blemishes out and you can get up a good shine why paint your casings , fork lowers or rear brake cover? If I'm to be asked they look way better polished , and it isn't that hard keeping them that way!

Very nice bike too much effort for me - I'll stick to paint on the engine.

I have stripped the clutch case cover with Nitromores is this suitable for painting or do I need to get some 1200 grit and remove the dark patches?Cutch Cover by Macabe Thiele, on Flickr




I was given 2 free oil filters with the bike are EMGO any good they came with the two O rings?


Oil Filters by Macabe Thiele, on Flickr

Okay, I follow your reasoning but am I wrong in thinking that a change in float level on an individual cylinder will also affect the mixture at idle as the fuel pressure head to the idle jet will have changed - thus making it run richer or weaker thus affecting the idle speed especially if more than one cylinder has been affected. I see the logic that once running on the main jet the effect would be less.

The post did not mention how many float levels were adjusted but it appears to be plural.The consequence of this I would have thought could result in an increase in overall engine rpm. The consequence of an increase in mixture/ rpm on one or even two cylinders would then affect the air flow through the remaining cylinders would it not? (assuming no air leaks)

I'm starting to get lost in my own  logic - I accept that sometimes in defiance of all rules engines can do some strange things. I particularly liked the idea that on it's side stand all carbs would be equally affected by a change in float level. The post is a little ambiguous as it starts to read that the new fuel tap caused the increase in idle speed whereas it was more likely that it was a result of changing float level(s). 

Back in the early 1970's the Vauxhall Viva Brabham conversion kits were plagued with hot engine idle speeds as were the early MG Maestro models - in both cases it was caused by fluctuating inlet manifold temperatures. Both manufacturers cured the issue by introducing heated inlet manifolds!

Change in float level will alter the mixture - might need air screw adjustments /  rebalance the carbs.

It can be stripped whilst still in the frame Ted. Even the 400/4 engines are a heavy lump when complete. Remove, rocker cover, head, barrels and then its easier and lighter to lift the bottom end out.

Will it not come out as a  complete unit?
I can easily obtain assistance with a lift out.