Hi all
Just another update on the Yellow peril (It should be called a bottomless money pit!!!)
Started to "dry assemble" the top end tonight after my cooking session last night!!!
Engine is really starting to come together. And after looking on Norbo "toy store", heart ruled the head (and wallet) and decided to replace the original tatty Yam head bolts with something more pretty! (Thanks Norbo)
IMG_5686 by
Alan Kelly, on Flickr
IMG_5683 by
Alan Kelly, on Flickr
Also as I had a bit of spare time in the machine shop the last few days, and have decided to do as Dusty did in an earlier engine build. And I have now bored out my outer cover where the Gear selector shaft pokes out, and have fitted a nice needle bearing assembly to repair the worn hole, to again reduce any inbuilt binding of the shift system shaft. (And its a nice easy mod')
IMG_5681 by
Alan Kelly, on Flickr
IMG_5682 by
Alan Kelly, on Flickr
Plan now will be to turn up a couple of dust shields to keep the muck out, and this improvement will be complete :-)
Also been looking on the forum and other places about the advantages or disadvantages of possibly adding reed spacers. And the general consensus seems that adding a 6mm spacer between the barrel and reed block helps out the bottom end for a bit of sacrifice of the top end as it increases the gas flow around the reeds themselves and the volume with the lower crankcases slightly. So found a bit of alloy plate looking for a home, and over a couple of lunchtimes have converted it to a couple of nice reed spacers :-).
IMG_5676 by
Alan Kelly, on Flickr
IMG_5678 by
Alan Kelly, on Flickr
IMG_5684 by
Alan Kelly, on Flickr
Next stage of the build is to next check piston ring gaps etc and finally build and "button up" the top end, and then make a leak down kit up at work and test.
Fit the refurb oil pump where it arrives back from that master of oil pumps Arrow (Thank you arrow)
And (told you it was a money pit) replace the cooked / knackered stator and other old ignition parts with a new new Power Dynamo system from Martin at M B designs. (Thank you Martin)
Think that's all for now.
Catch up again soon.
Best wishes Al.