Breaking In an Engine?

[funky]

Well chaps the running in process is almost done 60mile to go 10 litres of running in oil used and 3 oil filters later, Mobil 1 extended life in the post the bike pulls well and the jetting is getting there. done almost 500 miles keeping it aroung 3k to 4.5k RPM with no issues.

 

[funky]

Hi all runnig in process done Pilot jets arrived today so 42.5 pilot out 35 pilot in...new blanking rubbers also Mobil1 extended life 10/60 in new oil filter ... Valve clearances check timing chain check timing 15 degrees BTDC on a snapon timing gun Check did not start first go it needed chokeThats great as it never needed choke before means the mix is about right mixure screw out 1.5 turns Idle set 1200 RPM ...... Ready to Rock and Roll...
I may have to adjust the needle Valve to a richer setting as its 2 notches dow from top but i will take it for a run tomorrow and see hopfully all will be fineI have pilot jets 37.5 and 30 if i need to go up or down a little.
All the best Funky

 

[peanut]

sounds like you're almost there well done.

 

[funky]

sounds like you're almost there well done.

Hi all I think i have done it I changed the old pilot jets to 35 from a 42.5 but had popping and back fire on deceleration, I look at the plug and it seemed to be too lean , so adjusted the needle jet to the third notch from the second notch from the top, which is where the origina postition was I then richend the mixture screws 3.5 turns out and this is the result

The bike runs well on the fully synthetic Mobil1 good gear change I am happy with it.
All the best funky

 

[peanut]

still looks like it might be a little lean but its difficult to tell with those plugs. Its tons better than when you started though !

You sure need some new plugs or at least file the ends of the ground electrodes flat so that there is a nice sharp edge for the HT spark to jump to from the centre electrode.

 

[funky]

yep going to buy some new ones its all the wire brushing lol

 

[peanut]

heres my plugs from yesterday.

The left cylinder is running too lean .The right cylinder has a nice light biscuit colour but is still a bit leaner than I'd like it. I prefer to run at a medium biscuit colour like a digestive biscuit

I'm changing my 1.40 main jets back to the 1.45 jets which should return the mix back to where it needs to be for this engine (21670 miles)