Mac R-1 Restoration

[Jeff Clark]

Some of you already know about this kart from another board, figured I would share it here. I purchased this kart off a wanted add I ran a few weeks ago, I was very happy with the deal and didnt last long till I decided to get it apart for a restoration, Im taking it back to more as raced then a original new from Mac.
Im still not quite sure if it is a R-1 Or a R-300 it has a number on the lh support the brake rod goes through and a number 3 stamped on top of the seat hoop, also another number 37346322 on the front axle by the throttle pedal.
The kart is quite complete as seen it came with a single 101 engine (at one point it had twins) the uphostery has been redone but used factory pattern.

[Jeff Clark]

I took the Kart down to my hobby shop for a tear down and rebuild, I bagged and tagged everything and boxed it up. The floor pan was quite beat so a new one is in order, I kept the rear section in the lower seat hoop and will just weld it at the base.

This wheel is going back on.



Bag and Tag



Cut line

[Jeff Clark]

Took it out back for a blasting.



Closer inspection showed some damage under the rear frame mount. The kart has been raced hard some gussets have been added and they are staying.

[Jeff Clark]

I decided to go a little heavier on the pan than oem, I thought this old kart has been doing alot of flexing over the years and thought it would help with the rigidity, the original looked to be 20 guage .0359 I went with 18 guage .0478

Fitting the pan.



Pan installed.



I sanded the pan before installation, makes life a little easier later.

[Jeff Clark]

Number stamp on front axle, I didn't notice it until first prime and was stating to wet sand, figure I better snap a shot

[Dean Seavers]

Hey Jeff-

Looking good! It's almost certainly a R-300, with the giveaway being the tabs on the front axle- in those go bolts to keep the steering from going over center. R1s didn't have them, the R-300s did.

Keep us posted on the progress!

Dean

[Jeff Clark]

The tabs are oem, the gussets have been added but tabs appear stock by welds.



The main frame is ready for paint second prime with PPG K-36



I fount this interesting the rear frame section that unbolts has the same number as on the front, I have not seen this posted on any other Mac resto.

[Jeff Clark]

I was getting some stuff togeather tonight to send to chrome, I was real worried about letting those pedals out of my sight and have never had good luck on a re chrome on cast, So I decided to go to the dirty room fire up the old polish wheel and see what I coud do with what I have. This is the outcome out of some almost half century old chrome

[Jeff Clark]

BIG FLAKE!! Pics dont show it well very bright in the sun..