[oilman]

Hi

A 10w-40 is ideal

http://www.opieoils.co.uk/c-782-10w-40.aspx

The best oils there are the Silkolene Pro 4 and Comp 4, Motul 300v, Redline, Amsoil, Shell Advance Ultra 4 and Castrol Power 1 Racing. The Motul 5100, Castrol Power 1, Shell Advance VSX and Silkolene Super 4 are good cheaper alternatives.

Cheers

Tim

 

[Guest]

what about Motul 7100 ?

 

[Teri]

what about Motul 7100 ?

is that your answer to everything

 

[Guest]

is that your answer to everything

No He recommended Motul 5100 and was wondering what the difference between Motul 7100 and 5100 as I thought 7100 is better as its fully synth.

 

[Jed]

Hiiii!

I want to do an oil change on my er6 soon.
What's the best oil I can use?

Jesus Tom, Tim's listed a few times now the best oils to use

 

[oilman]

Sorry, must have forgot it, the 7100 is a really good choice.

Cheers

Tim

 

[Tom Bark]

Jesus Tom, Tim's listed a few times now the best oils to use

Keeping him busy

 

[blackbird]

Make: Yamaha
Model:YZF-R125
Year: 2009
Engine type: Liquid cooled 4 Stroke 124cc
Performance modifications: None
Riding style: Aggressive Road
What recommendation are you looking for? Engine, Gearbox, fork oil etc. - Every oil, fully servicing it over the next few weeks.

 

[Felix]

Nice riding style

 

[blackbird]

Nice riding style

Hehehe, how do you think I get everywhere so fast ? ;D

 

[Jorgeous Jorge]

Make: Yamaha
Model:YZF-R125
Year: 2009
Engine type: Liquid cooled 4 Stroke 124cc
Performance modifications: None
Riding style: Aggressive Road
What recommendation are you looking for? Engine, Gearbox, fork oil etc. - Every oil, fully servicing it over the next few weeks.

Gearbox oil is the same as engine oil on our bikes m8.
Engine oil - any motul, 5100 till 300V. I use 300V myself

 

[oilman]

Make: Yamaha
Model:YZF-R125
Year: 2009
Engine type: Liquid cooled 4 Stroke 124cc
Performance modifications: None
Riding style: Aggressive Road
What recommendation are you looking for? Engine, Gearbox, fork oil etc. - Every oil, fully servicing it over the next few weeks.

Hi

A 10w-40 is ideal for the engine/gearbox.

http://www.opieoils.co.uk/c-782-10w-40.aspx

The best oils there are the Silkolene Pro 4 and Comp 4, Motul 300v, Redline, Amsoil, Shell Advance Ultra 4 and Castrol Power 1 Racing. The Motul 5100, Castrol Power 1, Shell Advance VSX and Silkolene Super 4 are good cheaper alternatives.

For some reason, we don't have the fork oil listed on our databases.

Cheers

Tim

 

[oilman]

Feel free to contact us here for any oil recommendations or any oil related questions you may have.

Alternatively complete our oil recommendation form and we will get back to you asap. You can also give us a call on 01209 202949 Monday - Friday 8.30am - 5.30pm or just drop us an email to [email protected]

Cheers

oilman

 

[Avtech93]

Make: Mazda
Model: mx5
Year: 1997
Engine type: 1.8i
Performance modifications: Aftermarket exhaust, probably going to have an aftermarket air filter at some point too.
Driving style: use on road and occasional track days, so it's going to be driven hard.

I'll start with just the general engine oil

 

[oilman]

Hi

I would use a 5w-40 synthetic.

http://www.opieoils.co.uk/c-656-5w-40.aspx

Out of those, the best ones are the Fuchs/Silkolene Pro S, Millers CFS/CFS NT, Motul 300V, Red Line and Gulf Competition. The Motul 8100 X-Cess, Millers XF Longlife, Fuchs GT1 XTL/Supersyn, Gulf Formula G, Shell Helix and Mobil Super 3000 are good, cheaper alternatives.

Cheers

Tim

 

[Nils125]

I know Yamaha recommends 10W-40 viscosity for the YZF R125 2021 model. With the short change intervals of only 3000km, I´m thinking to use a 5W-40 (e.g. MOTUL 7100 5W-40 4T - Motul ) in the winter season und a 10W-50 (e.g. MOTUL 7100 10W-50 4T - Motul ) in the summer time.
What do you think.

 

[NorthCust]

for the last 2 years the clutch has dragged on my dirt bike, meaning i effectively was not able to switch to neutral when the engine is running, and also I had to start the bike against a wall every time it had been standing for a week or so i.e. so, start the bike with front wheel against the house, rev it, drop it into gear and just grind the back tyre till the clutch breaks loose....fun/exciting process! 😬 .

it turns out I had put the wrong weight of oil in the gearbox... it had 10w 40 rather than 5w 30... I replaced the oil recently once I became aware of my mistake and now the clutch doesn't drag and i can select neutral as intended.

Why is this relelvant? well the new oil is not really all that different from the old (the same change you're suggesting but the other direction) but those 5w made a HUGE difference to the usability/functionality of the bike, because it had been designed to use 5w 30 not 10w 40.

so IMHO if yamaha says use 10w 40 semi-synthetic, use 10w 40 semi-synthetic. You don't know what things depend on that specific viscosity or what knock-on issues you might be causing by having thinner or thicker oil.

I hope that helps.

 

[Nils125]

...if yamaha says use 10w 40 semi-synthetic...

I don´t know if they really recommend mineralic, semi-syntheic, or full-synthetic oil.
On page 31 of this Yamalube catalogue https://www.yamaha-motor.eu/content/dam/fi-esitteet/20-068_2020_YAMALUBE_EU-EN_16.pdf you can use all types on the YZF-R range.

But I have the impression Yamalube is more expensive as e.g. Motul.

 

[NorthCust]

your answer got me thinking to double check what I thought I knew re oil so I got digging in the manual.

I dunno if this is useful but i found this in the owners manual (for gen1), not the service manual. Is there perhaps a similar pdf/manual thing for the 2021? Seems to have a variety of oils it can use, depending on temperature range.

Interestingly no 5w in there, even for very cold temps, and having just had the experience with my dirt bike and seen just how differently that worked on 5w30 vs 10w~, i don't think I'd do that to my shiny new '21.

but yeah they don't really specify mineral/semi/fully synth.

I always used to run fully synth on my cars but they were all dry clutch. Some people (on here) seemed to have issues with fully synth. When I looked into it ages ago there seemed to be a general leaning (on here) towards 'silkolene 4' 10w40 semi-synth which is what i've been using for the last 4+ years and have not had any issues, but it migh tbe worth asking yamaha cos it might be different on the newer bikes..

 

[Nils125]

Thanks again for your helpful answer.