1. I feel like it’s leaning…
I have felt this since I bought YZF-R125, but when I lift it up with my rear paddock stand, I feels uncomfortable.
When I checked…
“Oh, the moto is leaning to the right!”
＜Tilt state＞
The way how to lift up is wrong or the ground is tilted?
I’m curious, so I checked the following.
- The position of the rear paddock stand and the tilt of the moto.
- The reason why the moto is leaning.
- After all, where is the best position?
| Date | 10th April 2021 |
| Subjects | Maintenance, Failure, Repair |
| Shop or DIY | DIY |
| Difficulty | |
| Working hours | 0.5 |
| Costs [yen] | 0 (Use of owned goods) |
2. Lift up points for rear paddock stand (STEP 1-6)
Swingarm right rear end
＜Swingarm right rear end＞
The round, flat area slightly forward of the axle is where the stand bobbins are fitted. Therefore,
- I would normally want to set the rear stand in this position.
- On the other hand, the flat part is the rear end of the swingarm.
Condition lifted by rear stand 1
Now set the rear stand in position 1 and 2 of STEP 1.
I will use a long roller stand made by J-trip.
As old stand might be a bit bent, I decided to use new one.
I also chose a place where the ground was as flat as possible for lifting.
＜Condition lifted by rear stand 1＞
Left: Position 2
Right: position 1
I can clearly see that position 1 is tilted more significantly than position 2.
The muffler is almost touching the L-fixture on the right side.
In the picture, the moto is tilted by about 3°.
When the moto is pushed gently from the left side, the left swingarm lifts off the stand.
Dangerous.
If a strong wind blows, it is likely to fall over.
The J-trip manual says that the position for lifting up by the rear stand is “In front of the axle shafts, but as far back as possible”.
However, I found that the R125 tilted when lifted in the specified position.
On the other hand, it also leans slightly at position 2? (ground or photo tilted?).
Lower part of swingarm
Looking at the underside of the swingarm, I could see why it was leaning.
The shape of left and right sides is different. (It is natural?)
＜Lower left of swingarm＞
＜Lower right of swingarm＞
The rear ends of the left and right swingarms have been shaved and flattened, perhaps to make the height more consistent.
So, is it correct to set the rear stand here?
Or have they just removed the casting hot-dip?
Condition lifted by rear stand 2
＜Condition lifted by rear stand 2＞
From the results of STEP 2, when I lift up moto, I set the rear stand at the end of the swingarm.
However, I am worried that the rear end might come off in some way.
I’m too scared to straddle the moto with the stand on.
(The J-trip manual says that you should not get on the moto with the stand on in the first place…)
Near axle shaft 1
Furthermore, set it in this position causes problems.
When removing the axle shaft, the tool hits the L-fixture.
＜Near axle shaft 1＞
To avoid the L-fixture and the stand, an extension bar (150 mm) has to be used.
Near axle shaft 2
＜Near axle shaft 2＞
Furthermore, part of the socket hits the L-fixture…
It’s hard to remove…”
So, I decided to put stand bobbins on it.
I wish Yamaha France had screw holes on the swingarm.
3. Summary
Asymmetrical swingarms look cool, but they can be harmful in these areas.
When using the L-fixture,
- I recommend setting the rear paddock stand on the rear end of the swingarm.
However, - Slightly tilted to the right.
- When loosening/tightening the axle, the socket hits on the L-fixture. It makes difficult to work with.
→Best solution is to use stand bobbins.
Goods used：
| No. | Name | Manufacturer | Parts number | Quantity | Amount[Yen] |
| 1 | Long roller stand (L-fixture type) | J-trip | JT-121LWT | 1 | 22,481 |
