Ignition timing question

[Bryanj]

The last one i had from ds about 6 months ago was genuine honda in a sealed bubble bag with part number lable and looked like tec

[Craizeehair]

Nice new complete plate delivered today, sealed Honda bag and marked TEC, a nice job for the weekend. Hopefully these will solve the issue.

Is there any particular lubricant that I should use for the felt?

[Oddjob]

I use silicon oil. Very versatile oil.

[Craizeehair]

I use silicon oil. Very versatile oil.

I have some of that

[Craizeehair]

Thanks for all the replies and suggestions, much appreciated by a novice, I know this stuff is 101 but I’m determined to learn and do more.

I fitted the new points plate over the weekend, set points gap and static timing along with new plugs and caps and set the valve clearances. There is a definite improvement, before there was a very distinct flat spot, this is much better now.

All I need now is to muster up the courage to do my first ever carb work!

[Trigger]

Cb750K0 to K6 carbs are so easy to get out and work on 

[Bryanj]

The effort to set points gap at 14 thou and get the timing spot on the F is worth it but do keep rechecking it as moving the plate alters the gap and altering the gap moves the timing so takes a lot of care and time as a novice but well worth it

[Craizeehair]

Thanks for the advice, I have some free time today so I will spend a bit of time checking the points and timing again.

I was also going to check the valve clearances again and maybe see if I can get my hands on a compression tester.

Looking through the book, the engine tune up lists the tasks in order, would this be the best and recommended order to carry out these checks…

Ignition timing and points gap, tappet clearance then can chain adjustment?

The air filter is new and the carbs are going to wait until the weather turns.

[Oddjob]

I would move check and adjust ignition timing down the list myself. Ok if you're doing a static test but if using a strobe or a dwell meter that involves running the engine and that means adjusting the tappets is affected as they're best done stone cold.

Firs thing we did was drop the oil and filter and that way it was draining as you worked on the rest.

[Craizeehair]

Thanks, only doing static timing so I guess that’s should be ok as listed.

Much appreciated.

[Craizeehair]

The effort to set points gap at 14 thou and get the timing spot on the F is worth it but do keep rechecking it as moving the plate alters the gap and altering the gap moves the timing so takes a lot of care and time as a novice but well worth it

Thanks for this advice, I finally got round to checking it again today and it wasn’t exactly where it should be. As you say, adjusting one threw others out and I hadn’t realised.

I spent what felt like an age, adjusting and setting points gaps and the timing marks on the F marks. I just couldn’t get 1-4 and 2-3 all adjusted bang on correctly at the same time.

As you rightly said it was a lot of care and time as a novice, although I did get there in the end.

But by ‘eck… was it worth it! A marked difference, the bike is running so much better.

Tick over when warm is now so much better, it used to tick over very low, perhaps 700-850 rpm. Now a steady 1050 rpm I would say, which also makes it sound so much better.

It has opened up more at higher revs and higher speeds, it always felt restricted approaching 60-65mph and never really hitting the higher revs comfortably, tonight she ran like a top.

Thanks for the help and advice all.

[Trigger]

CB750's do sound nice once they are spot on 

[Craizeehair]

Don’t they just and they don’t look too shabby either! Here is the bike during the run this evening. What you can’t see is me grinning from ear to ear!

[Trigger]

Nice looking early CB750. That would of originally come with the Hitachi plate and ND points 

[McCabe-Thiele (Ted)]

A very tidy looking bike you have there.