DT1 flat track project

I bead blasted the hubs and then waxed them with Meguiar's Deep Crystal carnauba wax. The bearings are All Balls Racing.




I bought new rims from MikesXS. I got a 2.15x19 (part #34-2019) for the front and a 2.15x18 (part #34-1902) for the rear. At about $160 for the pair they are a great deal.


They look excellent.


The only thing I don't care for about them is that the markings are stamped on the outside, but not a big deal.


I loose laced the rims, using MikesXS standard spoke set (part #19-0051) on the front.


For the rear I used an OEM Yamaha spoke set (part 322-25304-00). The SC500 hub is wider than an XS650 hub the rims are sold for, but no issues at all with spoke hole angles.


The tires I'm using are Duro HF308, which is a clone of the old Pirelli MT53. I got a 3.50-19 for the front and a 4.00-18 rear for less than $140 for the pair shipped. They make a 4.00-19 HF308, but it is a 6 ply, while these are both 4 ply (although the Duro website shows the 4.00-18 as a 6 ply). I think the 6 ply would be too stiff to work as well. If I ever decide to do an SR/TT500 flat track bike I'll use a modern flat track tire, but I think these should work fine for this bike.


Old looks, but new tires, this is the date code of the front showing it was made in the 40th week of 2013.


Here is the 3.50-19 HF308 with an original 3.00-18 MT53 to show how close they look.


For the rear sprocket I bought a new-old-stock C.T. Alloy 'blackloy'.


The gearing is just a guess until the bike is raced, but I think a 44 tooth is a good starting point. My stock '73 DT3 had 13/44 originally, which I changed to 14/44 for better street use.


The SOK rear brake shoes are from ebay seller Benjamin Shop.

Now I've got to true the wheels, mount the tires, and polish the rear brake plate.