Requirements: Jailbroken device. Cydia. iGameGuardian linked below
http://iosgods.com/topic/15951-free-full-igameguardian-7-for-ios-8/page-1
It is easiest to do this on a fresh instal of Road Riot since numbers change faster for money, jem's, and keys. Play till after you spend your 100$ and you will have left over money. Let's say it's 20$
1. Open Road Riot
2. Open iGameGardian
3. In iGameGaridan select Road Riot. A popup will appear. Push Select
4. Goto Search tab.
5. Press Number. Now enter the amount of money you have. In our example we have 20 and so we would enter 20 and press search. There will be a long list of results. Do not close iGameGaurdian!
6. Do not let the screen sleep. It's best to not let anything interrupt the process. You will be switching between Road Riot and iGameGuardian several times.
7. Leave iGameGaurdian and make the number change. In our example we have 20$ so we will play a little and increase our money. Let's say we now have 200$. Do not close Road Riot!
8. Return to iGameGaurdian and press Number.
9, Enter new number. In our example we would enter 200. The search results should be less.
10. Repeat the process of making the number change in Road Riot and then searching in iGameGaurdian until the results are narrowed down. These will be the Ox numbers to change.
I did this process at level 47 on Road Riot 1.24.19 on ios 9.0.2. After being level 700 for a bit I decided to do a fresh install of Road Riot and start with everything. I suggest doing coins first so you can fully upgrade and then jem's as you complete missions, Use the jem's to play the mystery box and do keys and anything else you would like to max out. ENJOY!
Although I am unsure which result changed levels and I do not know if it will be the same for everyone but this picture shows the ox#'s I was able to enter 700 into which is the level cap for Road Riot and change my level to 700
Once again, I do not know if this will be the same for everyone but below is the Ox# for revives.
This is my first post anywhere on this forum. I'm sure there are mistakes. Thank you admins in advance for taking care of them :-)