Is this normal?

Alexxxman

Standard Bore
Joined
Jan 25, 2023
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6
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Triumph rocket 3 gt
Hi fellow riders, I removed the read wheel for the first time for give the bike a deep wash after riding in some very dirty roads, when I noticed this free play on the final drive.
I had already noticed every now and then that sometimes when riding slow and switching gears I hear and feel a small "clunk" on the gearbox. Any thoughts on this?
Final Drive free play
 
Wow. It appears to be exactly the same ammount of free play, so maybe that's just the way it is but still, strange. I have a Suzuki M109r, also shatf driven, tomorrow I'll lift her up and check if it has a similar behavior.
 
Alexxxman said:
Wow. It appears to be exactly the same ammount of free play, so maybe that's just the way it is but still, strange. I have a Suzuki M109r, also shatf driven, tomorrow I'll lift her up and check if it has a similar behavior.
Click to expand...
Let us know- I'm surprised. A third check on a 2.5 Rocket would be nice- it took all of 10 minutes (torque value, btw, = 25Nm 1st, 100Nm second twist). Any takers?

One thing to consider- the movement at the center ("axle") is much smaller than the movement we are seeing at the larger diameter brake disc.

When parking the bike on a hill in gear and allowing it to move back it doesn't seem like all that much, but obviously the wheel is actually rotating much more. I have a feeling now that this is normal. Disclaimer (knocking on wood). I went through two final drives on my 2011 Roadster.

@Alexxxman "Bike has 4k miles on it."
Nearly 30K on my 3R with lots of spirited riding.
 
I would have expected some free play in the transmission if you're going from the axle through to the gear set.
I wouldn't be concerned about it in principle, but if the transmission is snatching under load and off-load then that could suggest a potential problem.

Remember, there is always free-play of this kind in a chain drive system.
 
Does the Rocket 3's have the same cush system as the older III's, that could explain the slack.
 
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