As a new owner of a Thunderbird 1600 i am looking for some advice on engine noise. So, bike has 1800 miles on it. Broke it in by the book,got it serviced at 500 miles. The day i was riding it home from the dealer i noticed a light rapping nosie as 3K RPM was approached. I wasent pushing the reves any higher due to the break in period.
At the first service made the dealer aware, was told no problems found. Now i am riding the bike in the 2500-3500 range and the rapping knocking noise is audible under light acceleration from 2800 RPM on up. At idle no noise. however i have obsessed over this to the max and spent last night out in the garage listening to it with a stethescope. with no load slowly bringing the RPMs up you can clearly hear it clacking from the right side cylinder wall. To me it sounds like piston slap or a loose wrist pin. Any succes with dealers fixing this noise for anybody. I have read all the other noise postings and noises usually get blamed on the valves adjustment, cam chain or decompressor mechanism.
At the first service made the dealer aware, was told no problems found. Now i am riding the bike in the 2500-3500 range and the rapping knocking noise is audible under light acceleration from 2800 RPM on up. At idle no noise. however i have obsessed over this to the max and spent last night out in the garage listening to it with a stethescope. with no load slowly bringing the RPMs up you can clearly hear it clacking from the right side cylinder wall. To me it sounds like piston slap or a loose wrist pin. Any succes with dealers fixing this noise for anybody. I have read all the other noise postings and noises usually get blamed on the valves adjustment, cam chain or decompressor mechanism.