CharleyH .

raider89, As Rod is 100% correct (as usual). Radical recommends overhauling the 1500 engine at 40 hours TOTAL Time. Many find this unintuitive because to use an extreme example if one engine was idl...

Hi @floridabmx, do you still have a 15" outer barrel for sale? Is you do, please send me some pictures at CharleyH@RadicalSportscarRegistry.com

Hi Rod (@rjbender), It is my understanding that the billet uprights and the Halo are both options... But I am not 100% sure.

Posted by: @parsonsj Thanks Charley! This was interesting for me as my SR800047 (the red one now owned by Joe Poland @joep) is actually a 2008 MY. I had been told it was a 2007. I have to revise my m...

With the help from some friends at Radical I just updated the latest Revision to the "Identifying Radical Model Years By Chassis Number" Guide. The latest version shows the start of the 2022 model ye...

The only Parts List and Exploded view I have been able to find for the Radical SR3 Gear Drive Unit (GDU) has such small writing that it is extremely difficult to read... So I modified it so it is now ...

Hi Joe, I am not an expert on this, but I understand that the SR8 had two different uprights. Here is a picture of a TJ0016 which the radical parts catalog describes as "C.V. Outer - RPE Ptec Transmi...

I don’t know for sure if these will be able to be retrofit on older cars but I suspect that it won’t work. The reason I say that is because it is hard to make a welded structure with four hard mounti...

@meatman< there are a lot of opinions on this subject and I don’t know that I know the correct answer, but reading the tread on the subject is a good idea. With that said, one of the inspections ...

@rojid , that video is very helpful. I didn’t realize that your car is not an XX but has the XX PDM system in it. What chassis number is your car? And who installed the PDM system? How long has th...

@higgins613, unfortunately it isn’t a standard font. I believe that Radical had it custom made and only did these letters.

FYI, I updated the video to more accurately show how the forward and reverse gears work.

@davidf, I would run the engine long enough to determine if each of the cylinders is heating up at roughly the same rate. You can do this with a non contact thermometer on each exhaust primary or th...

Here is a short video on how to change the Gear Ratio sets in the SR3 Gear Drive Unit (GDU). Attachment : Cover a.jpg

Hi @jonasr1, Where are you located and who did you have inspect your gear box? Also how many total hours are on your engine? The reason I ask this is because the symptoms you are describing are often...