Help thread: Suzuki GSXR 600 main relay clicks but injector power is missing

For Suzuki GSXR 600 main relay clicks but injector power is missing, make the stock setup healthy before tuning anything. Compression, valve clearance, air filter, plug color, chain/CVT condition and tire pressure all matter before chasing power.

I learned this the boring way: do one test, write the result down, then move on. Five changes at once only tells you that one of five things mattered. That is how I would approach Suzuki GSXR 600 main relay clicks but injector power is missing before spending money.

If the bike runs fine most of the time, would you still replace parts, or keep riding with a notebook and test plan?

Thomas Spagnoli: workshop approach for Suzuki GSXR 600 main relay clicks but injector power is missing

I would treat Suzuki GSXR 600 main relay clicks but injector power is missing as a diagnosis, not as a shopping list. The first job is to turn a vague complaint into a repeatable test.

1. Make the motorcycle mechanically healthy first: compression, valve clearance, plug, filter, fuel delivery, chain/CVT and brakes.
2. Choose changes that match the use case. City scooter, commuter, trail bike and highway bike need different compromises.
3. Confirm legal and insurance rules before derestriction, ECU work, exhaust changes or power kits.
4. Change one thing at a time and keep the original parts until the result is proven reliable.

Do not let forum confidence replace measurement. If two possible causes fit Suzuki GSXR 600 main relay clicks but injector power is missing, choose the one you can test cleanly first.

This is also the kind of method I teach in the free Motorcycle Mechanics Course here on the platform: observe, measure, confirm, repair, then test again. It is much easier to solve Suzuki GSXR 600 main relay clicks but injector power is missing when the process is clear.

If you report back, include the measured values, not only whether it felt better. Numbers make the thread useful for the next rider too.

I have enough to work with now. No heroic parts cannon today, just tests, notes, and hopefully fewer dramatic noises. I like that this turned into a checklist instead of a guessing contest.