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PostPosted: Sun Aug 28, 2016 3:13 am 
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On the street

Joined: Fri Aug 12, 2016 5:22 am
Posts: 28
Location: Saltash, Cornwall.
Country: UK
Bikes owned: '71 T250. '63 Ariel Leader. '73 T500
Getting close to start up time. I have available Castrol GTX 10-40 semi and Castrol Actevo pre-mix 2T oil. Are these suitable for my bike? :?

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PostPosted: Sun Aug 28, 2016 7:54 am 
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AMA Superbike
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Joined: Tue Oct 14, 2008 6:47 pm
Posts: 1707
Location: Blythewood, SC, USA
I only use 80/90 wt gear oil in the cases, but the injection oil should be fine. Many synthetic and semi-synthetics cause clutch slip.



Lane

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PostPosted: Sun Aug 28, 2016 10:05 am 
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To the on ramp

Joined: Tue Mar 10, 2015 12:35 pm
Posts: 314
Location: Wales
Country: WALES
Bikes owned: suzuki gt 550j
Oil is a much discussed topic on all bike forums.... Its a personal choice really. There are a few NoNo's. As pointed out fully synthetic can cause wet clutches to slip. A lot of guys use ordinary 10\40 mineral oil just change it often. With regards to 2T oil dont mix mineral and synthetic oil as it causes 'Glooping' something similar to clotting which will prevent flow. Good luck with the startup!

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PostPosted: Sun Dec 10, 2017 9:48 am 
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Around the block
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Joined: Fri Nov 03, 2017 3:39 am
Posts: 50
Country: UK
Bikes owned: GT 380, BMW K1600 GTL, Triumph Explorer Xc
Hi

Do semi-synthetic motor oils also cause clutch slip?

I have just bought some Putolene V twin 20W40 oil for my GT380 because it is the right viscosity. Will semi-synthetic cause me problems?

Thanks

David

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PostPosted: Sun Dec 10, 2017 3:45 pm 
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World Superbike
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Joined: Thu Feb 16, 2012 11:50 am
Posts: 2055
Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
Full synth will definitely cause clutch slip when 'spanking'. Semi synth 'might' cause clutch slip - I use ordinary 20w50 in the 550 and 750 gearboxes and change it every couple of thousand miles.
I use semi synth Putoline TT light in all the triples and they run fine. Like the others suggest, don't mix different types of 2T oil, and I would either run the 2T tank low then fill it with whatever you prefer, or empty it if it's been in there a long time or you're not sure what's in, then refill with new and run for the first 20 miles with the pump wedged fully open to get it through as quick as poss. Do it in one run, then let the pump work as normal while doing a bit of 6000rpm+ work to clear it out.


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PostPosted: Mon Dec 11, 2017 3:32 am 
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Around the block
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Joined: Fri Nov 03, 2017 3:39 am
Posts: 50
Country: UK
Bikes owned: GT 380, BMW K1600 GTL, Triumph Explorer Xc
Thanks for all that. :up: :up:

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