RESTORATION BLOG | YD Racer YD-A Yamaha

YD-A Restoration

The unique identity of this YD-A Asama Racer

It occurred to me that I have not provided evidence which highlight this bikes identity in one concise post, so here are the facts which...

Forks

The front forks were dry built to check fitment. It was a very worthwhile exercise as the chrome plating on the oil seal holders had...

Slow progress

After a long while, progress has once begun again on the restoration. I had become very dismayed and lost a lot of enthusiasm after...

Engine rebuild

Engine Rebuild

All the cases were soda blasted & vapour blasted to clean and restore them to look as if they just came out of the sand cast moulds....

Well, it's been a while...

Apologies if you were following this blog ! It has been far too long since I have posted any progress on the YD-A restoration. Since the...

YD-A engine confirmed

Upon closer inspection of the crankshaft removed from the engine, it was found that the crankshaft is the correct long stroke 54mm...

Mock up

A dummy front end was fitted as well as a YD1 fuel tank. The machine is now going away to have it's proper fuel tank made as well as its...

Together Again!

With a bit of help from Chip Hellie in the US (who supplied me with the drawings) and Guy Pearson at Exactweld who did the excellent...

YD Racer vs YD1 Crank Shafts

Here I have compared a standard 1957 YD1 production bike crank and conrod to that of a the YD Racer. It is quite clear that the 2 model...

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YAMAHA YD RACER

The early history of Yamaha Racing