20 Most Recent 2007 Yamaha YZF-R1 Questions & Answers

https://www.manualslib.com/manual/1071702/Yamaha-Yzf-R1-2007.html?page=328#manual

no go over complete bike with wrench and screwdriver--cud also be internal like a bad bearing/loose clutch--gut enuf oil init

Code 52 indicates an immobilizer problem.- Probably "signal interference"
This model is equipped with a selfdiagnosis device for the immobilizer system. If the immobilizer system is defective, the indicator light error code 52 could be one of those displayed. This error could be caused by signal interference.
If this occurs, try the following. 1. Use the code re-registering key to start the engine. NOTE: Make sure there are no other immobilizer keys close to the main switch, and do not keep more than one immobilizer key on the same key ring! Immobilizer system keys may cause signal interference, which may prevent the engine from starting.
2. If the engine starts, turn it off, and try starting the engine with the standard keys.
3. If one or both of the standard keys do not start the engine, take the vehicle, the code re-registering key and both standard keys to a Yamaha dealer and have the standard keys re-registered.
Hope this helps

There was a recall on the r1 for the throttle postion sensor, that's a good place to start.

Could be throttle position sensor