I've noticed a change in my bike in the last 1500 miles or so, wondering if it's normal. It feels more rumbly with some low frequency vibes that weren't there.
When new the engine was a little harsh and vibey as they all are. If you pushed it much into the higher revs it would shake a lot and complain, low and high frequency vibes. It did NOT want to rev that high. Easy enough, just don't rev high and all was well.
By around 1800 miles the engine was much smoother and smooth all the way up to 75mph. Most of my riding is between 40 and 60 but I took it faster a few times, up to 75 a few times, 80 once.
Now at 3400 it seems different. It starts easily and runs fine but it seems less smooth. At idle it seems like there are more low frequency vibes, same just off idle while riding. Nothing terrible. It runs fine at regular speeds, maybe a little more rumbly, pretty smooth up to 60mph. 65 gets a little low frequency vibe going, moreso at 70. It's not like when it was new and didn't want to rev and felt bad if you pushed it. It will go but just vibrates more than it did 1500 miles ago. The high frequency stuff is gone and the engine feels looser and more rumbly in general.
I'm planning to loosen all the engine mounts, have someone sit on the bike, and retorque them. It's an old trick used on a lot of British bikes to relieve any pent up tension in the frame and quiet resonance.
Bradey noted something similar in another thread. Is this just what a broken in engine feels like?
Scott