vibration

I haven't been on for awhile But now I have a issue. I have a 2006 88 TC with 20,000 miles today I noticed that I had vibration @ 35 mph and up at first I thouht wheel bearings. But when Ipull the clutch and let the engine idle @speed it smooths out any ideas.

That was my first thought.

Thanks guys I found cracked sparkplug all is well now in my little world.

Cracked plug causing vibration? That was an odd one. Glad you found the problem.

I'm digging thru old Threads in here, since I'm a newbie to this group, trying to get caught up.

Saw this Thread and decided to regurgitate it with an observation. "My" bike has a front end shimmy that I can't figure out. I can feel it somewhat when I have both hands on the handlebars, and it accentuates when I hold the handlebars with just my left hand (or right).

It seems to only occur at slower "downtown" speeds, and not on the highway, so far as I can tell. We DO have crappy roads around here, and I've had the bike looked over by a Licensed and Certified Motorcycle Mechanic, (who says it's "nothing") so I'm befuddled and bewildered. (lol).

I could have dismissed it, if it was on a 45 degree morning (lol) as being "me" and not the bike, but still.

Read somewhere that if I had mis-matched tires, that the difference in tread pattern could cause this, so I replaced the back tire (since it needed it anyway, and I was pulling and changing the chain and sprockets (just seemed like an opportune time), but the shimmy is still there. It's not uncontrollable or unmanageable, but I'd like it NOT to be there at ALL.

Any other suggestions??

-Soupy

Neck bearings.

I have the Service Manual, yes. I'm looking into it. Thanks for the suggestions on where to start looking!

-Soupy

Get the bike up off floor and level. Set front wheel straight ahead. Slowly moved handle bars a little left the right. If you feel a click your steering head bearings have a flat spot = replace. Put bike on floor. Sit on. Hold front brake tight try and move bike forward and back with legs. If the handle bars click = loose steering head bearings.
If your steering head bearings were never adjusted since new, for sure they will be loose. If bearings are ball bearings there's a chance they have a flat spot. Some bikes use tapered roller bearings which last almost forever if that's what you have may be a simple adjustment.

gumba is on it ! make sure if you adjust the neck bearings . grease the neck zerk fittings while you have them unloaded . they will take quite a bit of grease ! loosen all the fork pinch bolts also when adjusting neck bearings . recheck fall away !when done

Yo Florida Gumba. It's a Honda do they have a fall away???

nope no fall away on a metric bike like a honda .with the load off the front end you let it fall to the stering lock and it should just bounce off the steering stop on both sides .and it should be very light bounce.sorry did not see it was a metric bike , lol

You're forgiven!

Great stuff! I'll try these tests!!

-Soupy

I had to re-balance a front wheel once, if all else fails.......