Yamaha RD350 DG cylinder heads - Ebay - Livonia, MI

[SoCal250]

(not mine)
I guess buyers REALLY wanted these! Holy smokes
I believe the seller is a member here.

Yamaha RD350 DG Gold Radial Cylinder Heads
https://www.ebay.com/itm/225121199173
SOLD US $1,326.00 [ 17 bids ]
Aug 23, 2022 , 7:38AM

[Hawaii-Mike]

Holy Moley!

[rodneya]

There are a lot of people out there who 100% believe that those thinks add ridiculous horsepower and nothing will change their minds.

[m in sc]

same people that read that article saying DG pipes added 13 hp. 

[RDFL]

This guy must have seen that auction https://www.ebay.com/itm/403847745134

[SoCal250]

Apparently there was some issue with the first sale of the pair in Michigan. They were relisted at $1100 Buy It Now and sold again on Aug 28.

Yamaha RD350 DG Gold Radial Cylinder Heads
https://www.ebay.com/itm/225138599803
SOLD US $1,100.00 [ BIN ]
Aug 28, 2022 , 5:23PM

[IR8D8R]

I've always heard that the original DG heads were made from heat sink extrusions for power switchgear and were basically pure aluminum. People said they have porosity issues. I had a gold set on my blue '77 RD400 back in the 80's. They did not make it faster but they looked pretty good. I recall that a pair of heads was cheaper than a set of chambers from DG. Less than $50 each when I was making $200 a week. Chambers were around $150 the set so I didn't have any.

I think the modern reproductions are better quality and look like they are CNC'd from billet but I dunno... HVC bought the rights from Ottoco so maybe the materials are the same. Certainly the anodizing is better now and the finish seems smoother. The finish details on the DG's I had weren't great. Sharp edges that would cut your fingers changing plugs and small dings in the metal that weren't visible from a few feet away. Things you would get from having the blanks cut by a stoned teenager with a chop saw in 1979 Anaheim, CA.

People called DG heads and others "Porcupine" heads back then. These FMF Elsinore heads look more porcupine than the radials.

IR8D8R