(07-10-2025, 07:43 AM)rdprdp01 Wrote: [ -> ]A few questions, my friend. Do not loose your hope. The RS is one of the best motorcycles on the planet, and the Forum has at least two master mechanics that can assist. To balance expectations, you may have to take the leap of faith and allow a certified mechanic to open up the engine. But for now, let’s gather some more information:
When you drive the motorcycle at 10 miles per hour, how does it ride and sound?
When you drive the motorcycle at 30 miles per hour, how does it ride and sound compared to 10 miles per hour?
When you drive the motorcycle at 50 miles per hour (if it is safe to do so), how does it ride and sound compared to 10 miles per hour?
Is there any black exhaust plume at any RPM?
Have you changed the oil? Did you see anything in the oil?
How does the tread wear pattern look on the tires? Is there anything that suggests that either tire is out of round or that one of the tires is out of balance?
Do you have a Honda Motorcycle Dealer within commuting distance to your home?
Can you trailer your motorcycle or have access to a rental place where you can rent a trailer?
My instincts tell me that you have (1) more than one minor issue and (2) they can be fixed easily and relatively inexpensively.
David
Dear David,
- The bike generally it rides OK, no misalignment or wobbling, it stays straight, engine goes "round" no misfires or so. When cold no knockings.
- The problem came, doesn't matter the speed, after 3.200-3.500 rpm or more, when strong high pitch vibrations occurs, felled in the handlebar. I ride it even at 140 km/h, the more rpm raise the more vibrations are, and the middle range when you ride the highway is exactly between 3k- 5(6)k rpm. I try several times at 120-140 km/h and pull the clutch(on free), acceleration on idle and at that speed the bike was smooth as butter so, nothing to do with wheels, tires etc. Everything comes from the engine run after 3.200 rpm...
- No plume/smoke/fog from exhaust at any rpm
- Yes I've changed the oil after I've buy it, from AmsOil 10w40 to Honda 10w30 same problems; the former oil that I rune only ~ 1.000 Km was a little dark but nothing special inside it(like metal/debris etc). I'd tend to believe, if I remember correct, after that AmsOil I recall all this problems begins... but I'm not quite sure, because in spring '25 my first rides where short because of the weather so, not much attention payed.
- Again is not from tires or cyclistics, because e.g. at ~140 km/h and pull the clutch/idle rpm, the bike is very smooth as a normal bike has to be.
- Honda don't have an Oficial Representative in RO, there are only dealers, I was at the biggest one here, they made a kind of check and they declare they don't sell and don't know this bike and engine at all, in short they only can suspect/guess(but they give no clue or a suspicion) and is not OK with me that thing(we open and we will see what's there) I'd like to have a ~ certain diagnose and cause prior opening the engine.
- Tell me please what is your instinct suspicion(nr 1)!?
Let's hope is a minor thing; for me now the knocking thing is more dangerous and warrying then vibrations(or they are linked)
Thank you David!
