Help thread: Suzuki GS500 main relay clicks but injector power is missing

For Suzuki GS500 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 GS500 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 GS500 main relay clicks but injector power is missing

I would treat Suzuki GS500 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 GS500 main relay clicks but injector power is missing, choose the one you can test cleanly first.

For students, this is exactly why I built the free Motorcycle Mechanics Course on this platform. It teaches the method behind fuel, spark, compression, charging, diagnostics and safe workshop habits, so problems like Suzuki GS500 main relay clicks but injector power is missing become a sequence instead of a guess.

Add the model year, mileage, recent work and what changed before the problem started. With that, the next test becomes much easier to choose.

I will test this in order and report back. This is already clearer than the usual 'replace everything' advice. This should make the Suzuki GS500 main relay clicks but injector power is missing thread useful for the next person too.