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My '08 Trail Touring Edge (550) starts & runs great! The battery is getting charged &, at idle, the lights are bright, the Tach works. But .... rev it up a bit (the exact rpm varies) & the lights go dim (on battery power only??) & the Tach drops to zero. There is precious little information in...

Thanks guys. I'm off to the garage. I have seen that regulator in the footwell & will remove it. I think the service manual has a method to check it but I may just replace it. I'll also check every connection on the machine, ground & live, to ensure they're all secure. Your suggestions make...

My 550 Trail Touring starts & runs perfectly but, when I rev the engine whether on a stand or on the trail, the lights suddenly dim & the tachometer drops to zero. Let off on the throttle and things are fine again. The engine does not seem to be affected. Any thoughts before I start ripping it...

Thanks again 850. Great help. I'll let you know the outcome.

Wow! Thanks 850. I will check that today and let you know the result. Keep your fingers crossed.

Still having trouble. Checked every wire & connection I could find. Battery's good, electric starter working fine, everything seems to be perfect .... until I rev the engine. Then the lights dim to maybe 1/2 power and the tach drops to 0. If I let it idle down, everything is good again. Getting...

Thanks for the good news! I do thank you for responding. I was afraid of that. I'll try to check it out without removing it.

I hate electrical problems!! My near-perfect '08 Trail Touring (550 fan) starts and runs like new, but ... when I rev up the engine just a bit, like from 2000 to 3000rpm, suddenly the lights go dim and the tach drops to 0. The engine keeps running just fine! I've checked all connectors &...