SOHC.co.uk Forums > CB350/400
Exhaust preservation
Johnny4428:
I’m going with a cap full of 2 stroke oil in every tank of fuel on the 750 as a trial. Not used many capfuls so far this summer! Bloody weather! 😡😡
Bryanj:
If you are going to do that why not Castrol R and get the good smell
Johnny4428:
--- Quote from: Bryanj on July 06, 2022, 09:32:24 PM ---If you are going to do that why not Castrol R and get the good smell
--- End quote ---
Nice idea Bryan. Could try local motor factors, might have to get an Amazon order in.
K2-K6:
--- Quote from: Johnny4428 on July 06, 2022, 09:59:14 PM ---
--- Quote from: Bryanj on July 06, 2022, 09:32:24 PM ---If you are going to do that why not Castrol R and get the good smell
--- End quote ---
Nice idea Bryan. Could try local motor factors, might have to get an Amazon order in.
--- End quote ---
Definitely a good idea.
I've been running, ahem, field trials of castor oil in a petrol car for some time and using this https://www.amazon.co.uk/Castor-Oil-litres-Pure-Pressed/dp/B06WVD519M/ref=asc_df_B06WVD519M/?tag=googshopuk-21&linkCode=df0&hvadid=344355771029&hvpos=&hvnetw=g&hvrand=16984152145464781704&hvpone=&hvptwo=&hvqmt=&hvdev=t&hvdvcmdl=&hvlocint=&hvlocphy=1006886&hvtargid=pla-685207637751&psc=1 to dose at 100/1 (10ml per litre of fuel) to assess effect.
Also have mixed static samples of both E5 and E10 base fuel sitting in mixed state to gauge any solubility effects over time period. It mixes completely with these fuel which may have some mitigation to fuel stability when not in use. Both castor from bean and ethanol being plant based may have some compatibility that's useful. The samples show no visible instability over six months when left static.
Smells just like the race oil when used, a little more prominent when used at 75/1 (15ml per litre) without smoke being evident in the engine I'm running it through.
There's many other benefits to using it in other applications to if there's any interest to discuss here.
K2-K6:
--- Quote from: 350Simon on July 06, 2022, 02:00:47 PM ---I've got a cb350f fitted with a brand new 4 into 4 exhaust system. It's a David Silver aftermarket system.
Are these as prone to rust as the originals? I'd like to preserve it if possible as I have the sales invoice and I'd rather not have to replace it any time soon!
Someone I work with suggested removing the system, filling the pipes with gear oil, draining and then running the bike until the smoke disappears. Apparently it varnishes the inside of the pipes and helps to preserve them?
Has anyone done this and does it work or is it an old wives tale?
Cheers
Simon
Sent from my SM-G780G using Tapatalk
--- End quote ---
No means of judging the effects as I've not any experience of it in this application, but can say that it really stinks when burnt on exhaust if it's one of the EP type oils. The EP being "extreme pressure" I believe and facilitated by the use of sulphurous compounds to avoid metal spalling in gear trains under high loading.
I mean really, really stinky ;D
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